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| MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH DESCRIPTION The M52348SP is an semiconductor IC for RGBHV interface that switches signals input from two types of image source and outputs them to CRT display etc. The synchronous signal meets the frequency band of 10 kHz to 200 kHz and is output with TTL. The IC adopts 250 MHz for the frequency band width of video signal, providing high resolution images. CRT. It is optimum as an IC for interface with various types of new media including high resolution PIN CONFIGURATION (TOP VIEW) VCC1(R) INPUT1(R) VCC1(G) INPUT1(G) VCC1(B) INPUT1(B) INPUT1(H) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 32 31 30 29 28 27 VCC2(R) OUTPUT(R) GND VCC2(G) OUTPUT(G) GND VCC2(B) OUTPUT(B) GND OUTPUT (for Sync on G) NC VCC M52348SP 26 25 24 23 22 21 FEATURES INPUT1(V) GND INPUT2(V) GND INPUT2(G) GND INPUT2(B) * * * Frequency band : RGB..................................................250MHz HV.........................................10Hz to 200kHz Input level : RGB..........................................0.7 V P-P (typ.) HV TTL IN PUT 3 to 5 Vo-p (bipolar) Only the G channel is equipped with output for sync-on-video. HV output adopts TTL format. 20 OUTPUT(H) 19 OUTPUT(V) APPLICATION CRT display, TV, VCR, etc. INPUT2(H) 15 INPUT2(V) 16 18 GND 17 SWITCH RECOMMENDED OPERATING CONDITION Supply voltage range.....................................................4.5V to 5.5V Rated supply voltage..................................................................5.0V Outline 32P4B NC:NO CONNECTION BLOCK DIAGRAM OUTPUT(R) VCC 2(R) 32 31 OUTPUT OUTPUT (for sync on G) VCC 2(G) GND (B) OUTPUT (G) GND GND NC VCC 2 (B) 30 29 28 27 26 25 24 23 22 OUTPUT VCC OUTPUT (H) 21 20 19 (V) GND 18 17 SWITCH 1 2 INPUT1(R) 3 4 INPUT1(G) 5 6 INPUT1(B) 7 8 INPUT1(V) 9 10 INPUT2(R) 11 12 INPUT2(G) 13 14 INPUT2(B) 15 16 INPUT2(V) VCC1(R) VCC1(G) VCC1(B) INPUT1(H) GND GND GND INPUT2(H) 1 MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH ABSOLUTE MAXIMUM RATINGS (Ta=25C) Symbol VCC Pd Topr Tstg Vopr Vopr' Sarge Parameter Supply voltage Power dissipation Operating temperature Storage temperature Recommended operating supply voltage Recommended operating supply voltage range Electrostatic discharge Ratings 7.0 1603 -20 to +85 -40 to +150 5.0 4.5 to 5.5 200 Unit V mW C C V V V ELECTRICAL CHARACTERISTICS (VCC=5V, Ta=25C) Symbol ICC1 ICC1 Parameter Circuit current 1 (no signal) Circuit current 2 (no signal) Output DC voltage 1 Output DC voltage 2 Output DC voltage 3 Output DC voltage 4 Maximum allowable input 1 Maximum allowable input 2 Voltage gain 1 Relative voltage gain 1 Voltage gain 2 Relative voltage gain 2 Voltage gain 3 Voltage gain 4 Frequency characteristics 1 (100MHz) Relative frequency characteristics 1 (100MHz) Frequency characteristics 2 (100MHz) Relative frequency characteristics 2 (100MHz) Frequency characteristics 3 (100MHz) Relative frequency characteristics 4 (250MHz) T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.23 T.P.31 T.P.28 T.P.25 Test point A A Power supply Test conditions SW2 Rin1 SW4 Gin1 SW6 Bin1 SW7 Hin1 SW8 SW10 SW12 SW14 SW15 SW16 Vin1 Rin2 Gin2 Bin2 Hin2 Vin2 SW SW17 Swich Limits Unit Min. 46 46 Typ. 66 66 Max. 86 86 mA mA Vcc 5 5 b b b b b b - b b b b b b - b b b b b b - b b b b b b b b b - b b b b b b b b b - b b b b b b b - b b b b b b b - b b b b b b b - b b b b b b b b b - b b b b b b b b b - b GND a OPEN b GND a OPEN b GND a OPEN b GND a OPEN b GND RGB SW block VDC1 VDC2 VDC3 VDC4 Vimax1 Vimax2 GV1 GV1 GV2 GV2 GV3 GV4 FC1 FC1 FC2 FC2 FC3 FC4 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.23 5 5 5 5 5 5 5 1.8 1.8 1.1 1.1 1.4 1.4 -0.5 -0.6 2.2 2.2 1.5 1.5 1.6 1.6 0.1 0 0.1 0 0.2 0.2 0 0 0 0 1.5 1.5 2.6 2.6 1.9 1.9 0.7 0.6 0.7 0.6 0.8 0.8 1.0 1.0 1.0 1.0 1.0 1.0 V V V V VP-P VP-P dB dB dB dB dB dB dB dB dB dB dB dB T.P.23 T.P.2 T.P.4 T.P.6 T.P.10 T.P.12 T.P.14 T.P.31 T.P.28 T.P.25 abb bab bba SG1 SG1 SG1 b b b - abb bab bba SG1 SG1 SG1 b b b - abb bab bba SG2 SG2 SG2 Takes ratio of the values above 5 b b b b b abb bab bba SG2 SG2 SG2 b b a OPEN -0.5 -0.6 Takes ratio of the values above. 5 5 5 b b a SG2 b b b b b b b b b b b b b a SG2 b b b b b b b b b b b GND a OPEN b GND -0.4 -0.4 -0.1 -0.1 T.P.23 T.P.31 T.P.28 T.P.25 abb bab bba SG4 SG4 SG4 Takes ratio of the values above 5 b b b b b abb bab bba SG4 SG4 SG4 b b a OPEN -0.1 -0.1 Takes ratio of the values above 5 5 abb bab bba SG5 SG5 SG5 b b b b b b b b b b b b b b b GND a OPEN -3.0 -3.0 abb bab bba SG5 SG5 SG5 2 MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH ELECTRICAL CHARACTERISTICS (cont.) Symbol Parameter Crosstalk 1 between 2 inputs (10MHz) Crosstalk 2 between 2 inputs (10MHz) Crosstalk 3 between 2 inputs (100MHz) Crosstalk 4 between 2 inputs (100MHz) Crosstalk 1 between channels (10MHz) Crosstalk 2 between channels (10MHz) Crosstalk 3 between channels (100MHz) Crosstalk 4 between channels (100MHz) Pulse characteristics 1 Tf1 Tr2 Pulse characteristics 2 Tf2 HV SW portion VOH1 VOH2 VOL1 VOL2 Vith1 Vith2 Trd1 Trd2 Tfd1 Tfd2 Vsth1 Vsth2 High-level output voltage 1 High-level output voltage 2 Low-level output voltage 1 Low level output voltage 2 Input threshold voltage 1 Input threshold voltage 2 Rising delay time 1 Rising delay time 2 Falling delay time 1 Falling delay time 2 Switching threshold voltage 1 Switching threshold voltage 2 T.P.19 T.P.20 T.P.19 T.P.20 T.P.19 T.P.20 T.P.19 T.P.20 T.P.7 T.P.8 T.P.15 T.P.16 T.P.19 T.P.20 T.P.19 T.P.20 T.P.19 T.P.20 T.P.19 T.P.20 T.P.17 Test point T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 T.P.31 T.P.28 T.P.25 Power supply Test conditions SW2 Rin1 SW4 Gin1 SW6 Bin1 SW7 Hin1 SW8 SW10 SW12 SW14 SW15 SW16 Vin1 Rin2 Gin2 Bin2 Hin2 Vin2 SW SW17 Swich Limits Unit Min. Typ. -60 Max. -50 dB Vcc 5 C.T.I.1 abb bab bba SG3 SG3 SG3 b b b - b b b b b b b b b b b b - b b b b b b b b b b b b - b - b - b - b b b b b b b b b b b b b - b b b b b b b b b b b b - GND OPEN OPEN GND GND OPEN OPEN GND b GND a OPEN b GND a OPEN b GND b GND a OPEN a OPEN -50 -40 dB -40 -35 dB -40 -35 dB -60 -50 dB C.T.I.2 5 abb bab bba SG3 SG3 SG3 b b b - C.T.I.3 5 abb bab bba SG4 SG4 SG4 b b b - C.T.I.4 5 abb bab bba SG4 SG4 SG4 b b b - C.T.C.1 5 abb bab bba SG3 SG3 SG3 b b b - C.T.C.2 5 abb bab bba SG3 SG3 SG3 b b b - - -50 -40 dB C.T.C.3 5 abb bab bba SG4 SG4 SG4 b b b - - -30 -25 dB C.T.C.4 Tr1 5 5 5 5 5 abb bab bba SG4 SG4 SG4 b b b b b b - - -30 1.6 1.6 1.6 1.6 -25 2.5 2.5 2.5 2.5 dB nsec nsec nsec nsec a a a SG6 SG6 SG6 a a a SG6 SG6 SG6 b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b - a a a SG6 SG6 SG6 a a a SG6 SG6 SG6 b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b - 5 5 5 5 5 5 5 5 5 5 5 5 c c 5.0V 5.0V b c 0V b c Variable b c 0V b c Variable b b GND c a c 5.0V 5.0V OPEN b b b GND c a c 0V 0V OPEN b b b GND c Variable 4.5 4.5 2.0 2.0 0.5 0.5 5.0 5.0 0.2 0.2 2.5 2.5 100 100 50 50 1.5 1.5 5.0 5.0 3.0 3.0 150 150 100 100 2.0 2.0 V V V V V V nsec nsec nsec nsec V V b - b - c Variable a OPEN a a SG7 SG7 b b a a SG7 SG7 b b - b b b GND a a a SG7 SG7 OPEN b b b GND a a a SG7 SG7 OPEN c c T.P.17 a a a a a b b b b b SG1 SG1 SG1 SG7 SG7 b b b b b a a a a a - SG1 SG1 SG1 SG7 SG7 3 MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH ELECTRICAL CHARACTERISTICS TEST METHOD Note) Omitted because the signal input pins and SW No. have been described in the Electrical Characteristics Table. SWA shall take side a unless otherwise noted. ICC1, ICC2 Circuit current 1, circuit current 2 (no signal) The conditions shall be as provided in the Electrical Characteristics Table. When SW17 is assigned to GND (or OPEN), and SWA is placed on side b, take measurements in ampere meter A and specify the value to be Icc1 (or ICC2). VDC1, VDC2 Output DC voltage 1, output DC voltage 2 When SW17 is assigned to GND (or OPEN), and no signal is input, measure T.P.31 (T.P.28, T.P.25) output DC voltage. Specify the voltage to be VDC1 (or VDC2). FC1 = 20LOG VDC3, VDC4, Output DC voltage 3, output DC voltage 4 Measure the output DC voltage of T.P.23 in the same manner as in VDC1 and VDC2, and specify the voltage to be VDC3 (VDC4). Vimax1, Vimax2, maximum allowable input 1, maximum allowable input 2 Assign SW17 to GND and input SG1 into pin 2 2. When this is the case, measure the output amplitude of T.P.23. 3. As in the case of GV1, GV1, GV2 and GV2, find GV3 and GV4. FC1, FC1 frequency characteristics 1, relative frequency characteristics 1 (100 MHz) FC2, FC2 frequency characteristics 2, relative frequency characteristics 2 (100 MHz) 1. The conditions shall be as provided in the Electrical Characteristics Table. This measurement shall use active probe. 2. Assign SW17 to GND and input SG2 into pin 2 only. When this is the case, specify the output amplitude of T.P.31 to be VOR1. In the same manner, specify the output to be VOR2 with SG4 input. 3. In this case, calculate frequency characteristics FC1 by the following formula: VOR2 VOR1 4 [VP-P] [VP-P] and pin 6 (dB) 4. In response to inputs into pin only, find frequency characteristics Fc1 in the same manner. 5. Calculate the difference in frequency characteristics between channels to find relative frequency characteristicsFc1. 6. Assign SW17 to OPEN. In the same manner, find FC2 and FC2. only. Gradually FC3, FC4 Frequency characteristics 3, frequency characteristics 4 (250 MHz) In the same manner as finding FC1, FC1, FC2 andFC2, find FC3 and FC4 in response to input signal SG5. C.T.I.1 Crosstalk 1 between 2 inputs C.T.I.2 Crosstalk 2 between 2 inputs (10 MHz) 1. The conditions shall be as provided in the Electrical Characteristics Table. probe. 2. Assign SW17 to GND and input SG3 into pin to be VOR3. 3. Assign SW17 to ONPEN, measure the output amplitude of T.P.31 at that time and specify the value to be VOR3'. 4. When this is the case, calculate crosstalk C.T.L1 between 2 inputs by the following formula: (dB) C.T.I.1 = 20LOG VOR3' VOR3 [VP-P] [VP-P] (dB) 2 increasing the SG1 amplitude, read the amplitude of the input signal when the output waveform of T.P.31 is strained. The value is specified to be Vimax1. In the same manner, measure Vimax 1 in response to inputs into pin , , and 4 and pin 6 only. Then assign SW17 to OPEN, measure the values at inputs into pins 10 12 14 only. Then specify the values to be Vimax2. GV1,GV1, voltage gain 1, relative voltage gain 1 GV2, GV2, voltage gain 2, relative voltage gain 2 1. The conditions shall be as provided in the Electrical Characteristics Table. 2. Assign SW17 to GND and input SG2 into pin 2 only. When this is the case, read the amplitude of T.P.31 output and specify the value as VOR1. 3. Calculate voltage gain GV1 by the following formula: VOR1 0.7 [VP-P] [VP-P] This measurement shall take active only. Measure the output amplitude of T.P.31 at that time and specify the value GV1=20LOG 4. In the same manner, find voltage gain GV1 in response to inputs into pin 4 and pin 6 only. 5. In the same manner, find crosstalk between 2 inputs in response to inputs into pin 4 5. Calculate the difference in voltage gain between channels to find relative voltage gain GV1. 6. In the same manner, find GV2 and GV2. GV3, GV4 Voltage gain 3, voltage gain 4 1. The conditions shall be as provided in the Electrical Characteristics Table. and pin 6 only. 10 6. Assign SW17 to OPEN and then input SG3 into pin the value to be VOR4'. only. Measure the output amplitude of T.P.31 at that time and specify 7. Assign SW17 to GND and then measure the output amplitude of T.P.31 at that time. Specify the value to be VOR4'. 4 MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH 8. When this is the case, calculate crosstalk C.T.I.2 between 2 inputs by the following formula: VOR4' VOR4 [VP-P] [VP-P] (dB) 2. With active probe, measure rising Tri and falling Tfi for 10% to 90% of the input pulse. 3. With active probe, measure rising Tro and falling Tfo for 10% to 90% of the output pulse. 4. The pulse characteristics Tr1 and Tf1 (Tr2 and Tf2) are as follows: 100% 90% C.T.I.2 = 20LOG 9. As in the same manner, find crosstalk between 2 pints in response to input into pin 12 and pin 14 only. 0% 10% Tr Tf C.T.I.3 Crosstalk 3 between 2 inputs C.T.I.4 Crosstalk 4 between 2 inputs (100 MHz) Specify input signal to be SG4. In the same manner as in C.T.I.1 and C.T.I.2, find crosstalk C.T.I.3/C.T.I.4 between 2 inputs. C.T.C.1 Crosstalk 1 between channels C.T.C.2 Crosstalk 2 between channels (10 MHz) 1. The conditions shall be as provided in the Electrical Characteristics Table. probe. 2. Assign SW17 to GND and input signal SG3 into pin 2 Tr1(Tr2) = Tf1(Tf2) = (Tro)2 - (Tri)2 (Tfo)2 - (Tfi)2 (nsec) (nsec) VOH1, VOH2 High-level output voltage 1 and high-level output voltage 2 The conditions shall be as provided in the Electrical Characteristics Table. Assign SW17 to GND (or OPEN), apply 5V to the input pin only. and measure the output voltage. Specify the value to be VOH1 (VOH2). VOL1, VOL2 Low-level output voltage 1 and low-level output voltage 2 The conditions shall be as provided in the Electrical Characteristics Table. Assign SW17 to GND (or OPEN), apply 0V to the input pin (dB) and measure the output voltage. Specify the value to be VOL1 (VOL2). Vith1 Input threshold voltage 1 10 This measurement shall take active Specify the output amplitude of T.P.31 to be VOR5 at that time. 3. In the same status, measure the output amplitude of T.P.28 and T.P.25and specify the values to be VOG5 and VOB5. 4. When this is the case, calculate crosstalk C.T.C1 between channels by the following formula: VOG5 or VOB5 [VP-P] VOR5 [VP-P] C.T.C.1 = 20LOG 5. In the same manner, find crosstalk between channels in response to inputs into pin 4 and pin 6 only. 6. Assign SW17 to OPEN and then input signal SG3 into pin time. Vith2 Input threshold voltage 2 The conditions shall be as provided in the Electrical Characteristics Table. Assign SW17 to GND (or OPEN). Gradually increasing the voltage of input pin from 0V, measure the input voltage when the output voltage is Hi (4.5V or more). Specify the value to be Vith1 (Vith2). Trd1, Trd2 Rising delay time 1 and rising delay time 2 only. Specify the output amplitude of T.P.31 to be VOR6 at that 7. In the same status, measure the output amplitude of T.P.28 and T.P.25. Specify the values to be VOG6 and VOB6. 8. When this is the case, calculate crosstalk C.T.C.2 between channels by the following formula: VOG6 or VOB6 [VP-P] VOR6 [VP-P] (dB) C.T.C.2 = 20LOG Tfd1, Tfd2 Falling delay time 1 and falling delay time 2 The conditions shall be as provided in the Electrical Characteristics Table. Assign SW17 to GND (or OPEN), input SG7 into the input pin and measure the output waveform. Rising delay time Trd1 (Trd2) and falling delay time Tfd1 (Tfd2) shall be found according to the following diagram. 9. As in the same manner, find crosstalk between channels in response to inputs into pin 12 and pin 14 only. C.T.C.3 Crosstalk 3 between channels C.T.C.4 Crosstalk 4 between channels (100 MHz) Specify input signal to be SG4. In the same manner as in C.T.C.1 and C.T.C.2, find crosstalk C.T.C.3/C.T.C.4 between 2 channels. Tr1, Tf1, Tr2, Tf2 Pulse characteristics 1 and pulse characteristics 2 1. The conditions shall be as provided in the Electrical Characteristics Table. Assign SW17 to GND (or OPEN). 5 OOO SG7 Trd Tfd 50% 50% MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH Vsth1 Switching threshold voltage 1 Vsth2 Switching threshold voltage 2 1. The conditions shall be as provided in the Electrical Characteristics Table. Input SG7 into pins SG7 into pins 7 2 TYPICAL CHARACTERISTICS THERMAL DERATING (MAXIMUM RATING) 2000 , 4 and 6 . Input POWER DISSIPATION Pd(mW) and 8 . Do not input signal into other pins. 17 2. Apply a voltage of 0V to pin and check each of TP19, TP20, , specify the output at 1603 1600 TP23, TP25, TP28 and TP31 for output of signal. 3. Gradually increasing the voltage at pin pin 17 17 1200 to be Vsth1 when the signal is not output from the above , and and pins. 4. As in the same manner, input SG1 into pins input SG7 into pins pins. 5. Apply a voltage of 5V to pin 17 15 10 12 14 800 and 16 . Do not input signal into other and check each of TP19, TP20, , specify the output at 400 -20 0 25 50 75 85 100 125 150 TP23, TP25, TP28 and TP31 for output of signal. 6. Gradually decreasing the voltage at pin pin 17 17 AMBIENT TEMPERATURE Ta (C) to be Vsth2 when the signal is not output from the above pins. INPUT SIGNAL SG No. signals Sine wave (f=60 kHz, 0.7VP-P, amplitude variable) SG1 0.7VP-P (Amplitude variable) SG2 SG3 SG4 SG5 Sine wave (f=1 MHz, amplitude 0.7VP-P) Sine wave (f=10 MHz, amplitude 0.7VP-P) Sine wave (f=100 MHz, amplitude 0.7VP-P) Sine wave (f=250 MHz, amplitude 0.7VP-P) Pulse of 0.7VP-P in amplitude (f=60kHz, duty 80%) SG6 0.7VP-P Square wave (Amplitude 5.0 VO-P TTL, f=60 kHz, duty = 50%) SG7 5V 0V 6 7 TP28 G 0.01 0.01 47 SW17 b c 0.01 a OPEN TP25 B TP23 GOUT (for Sync on G) TP20 H TP19 V 31 30 29 28 27 26 25 24 23 22 21 22 19 18 17 SW GND:INPUT1 SW OPEN:INPUT2 2 TP4 TP6 TP7 TP8 TP10 TP12 0.01 0.01 3 4 5 6 7 8 9 10 11 12 13 14 TP14 15 TP15 16 TP16 TEST CIRCUIT 0.01 A 47 a b SW A Vcc 5V TP31 R 0.01 32 M52348SP 1 0.01 47 47 47 TP2 0.01 47 0.01 SW7 a SW4 SW6 b a a c ab c ab b b a SW10 SW8 b SW12 a b 47 47 0.01 47 0.01 47 SG1 SG2 SG3 SG4 SG5 SG6 SG7 0.01 47 SW2 0.01 SW15 a SW14 b SW16 c abc ab WIDE FREQUENCY BAND ANALOG SWITCH MITSUBISHI ICs (Monitor) Units Reslstance : Capacitance : F M52348SP MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH DESCRIPTION OF PIN Pin No. 1 3 5 Name VCC1(R) VCC1(G) VCC1(B) Peripheral circuit of pins DC voltage (V) 5.0 Description of function Input at low impedance. 2 INPUT1(R) INPUT1(G) 620 2.8V 800 4 2.0 6 INPUT1(B) 1.0mA Input pulse of 3V or more and 5V or less. 7 INPUT1(H) INPUT1(V) 3 to 5V 8 0V 0.2mA 9 11 13 18 24 27 30 GND GND Input at low impedance. 10 INPUT2(R) INPUT2(G) 620 2.8V 800 12 2.0 14 INPUT2(B) 1.0mA 8 MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH DESCRIPTION OF PIN (cont.) Pin No. Name Peripheral circuit of pins DC voltage (V) Description of function Input pulse of 3V or more and 5V or less. 3 to 5V 15 INPUT2(H) INPUT2(V) 0V 16 0.2mA Enables switching between OPEN and GND. 10k 12k 17 SWITCH 7.3k 2.6 13k 2.3V Contains output resistance. 19 OUTPUT(V) OUTPUT(H) 1k 20 21 VCC1(R) (H,V,SWITCH) NC 5.0 - Apply the same voltage. 22 Contains output resistance. 23 25 28 31 OUTPUT (SYNC ONG) OUTPUT(B) OUTPUT(G) OUTPUT(R) 50 430 25 , 28 , 31 50 23 500 1.5 2.2 26 29 32 VCC2(B) VCC2(G) VCC2(R) 5.0 9 MITSUBISHI ICs (Monitor) M52348SP WIDE FREQUENCY BAND ANALOG SWITCH CAUTIONS FOR USING THE IC 1. Standard video inputs for R, G and B are specified to be 0.7 VP-P. 2. The H and V inputs are specified to be 5.0 VTTL. 3. Input signals into input pins at fully lowered impedance. 4. The H and V output pins (pins 19 CAUTIONS FOR MANUFACTURING BOARDS Built-in wide band analog switch may cause oscillation due to the wiring shape on the board. Be careful for the following points. * * * * * * and 20 ) are as shown in Figure 1. Resistance can be inserted into a portion between power supplies to improve the rising speed. However, set the R value to limit the current to 7.5 mA or less. In Figure 1, R is 2 k or more. 5V 5V R When inserting an output pull-down resistance, make wire between the output pin and the resistance as short as possible. Make the load capacitance of output pins as small as possible. Install the Vcc-GND bus controller capacitance near the pin. Vcc shall use a stable power supply. (Individual Vcc should use an independent power supply.) Insertion of a resistance of several tens of between the output pin and the circuit at the next stage makes oscillation harder. GND should be as wide as possible. Basically, solid earth should be used. 1k I=7.5 mA or less Fig. 1 5. The R, G and B output pins (pins 25 , 28 and 31 ) are as shown in Figure 2. Pull-down resistance can be added to between GNDs according to the driving capability. However, set the R value to limit current I to 10 mA or less. In Figure 2, R is 500 or more. 5V I=10 mA or less 50 430k R Fig. 2 6. The switch (pin 17 ) can be switched with GND and OPEN. GND: Outputs signal from the INPUT 1 side. OPEN: Outputs signal from the INPUT 2 side. For switching by applying voltage as shown in Figure 3; 0 to 0.5V: Outputs signal from INPUT 1 side. 2 to 5V: Outputs signal from INPUT 2 side. The applied voltage shall be less than Vcc. 17 Fig. 3 10 |
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