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CF5761 series
CMOS Analog Clock IC with Alarm Function
OVERVIEW
The CF5761 series are analog clock ICs with alarm functions that derive their timing from a standard 32.768kHz oscillator element. Two kinds of alarm output are available and can be selected using a control pin. The series lineup comprises devices with various alarm patterns and motor outputs for a wide range of clock specifications. They support convenient functions, such as input chattering elimination circuit and power-on clear functions. They are fabricated using Molybdenum-gate CMOS process, realizing low power consumption.
FEATURES
I I
PAD LAYOUT
(Unit: m)
I
I I I I I I I I
32.768kHz fundamental frequency oscillator Feedback resistor and oscillator capacitor CD built-in Supports various alarms: piezo-alarm, electromagnetic speaker Snooze function Switchable alarm function using SEL pin Alarm auto-stop function (see series lineup) Input chattering elimination circuit (SEL, AI, SN) Test function 1.2 to 3.6V operating supply voltage Molybdenum-gate CMOS process Chip form (CF5761xx)
VDD TI O1 O2 VSS AO2 1 2 3 4 NPC 5 6 7
13 12
(1410, 1370)
HA5761
11 10
AI SN XT XTN
9 8
(0,0) AO1 AO3 SEL
Chip size: 1.41 x 1.37mm Chip thickness: 300 30m Pad size: 100 x 100m Reverse side: VDD level
ORDERING INFORMATION
Device CF5761xx Package Chip form
SEIKO NPC CORPORATION --1
CF5761 series
SERIES LINEUP
Built-in capacitance1 Motor output CG [pF] CD [pF] Active level Needle period tCY [s] Pulsewidth tPW [ms] Active level Bounce delay [ms] Active level Snooze time tSNZ [s] Bounce delay [ms] SEL pin Application Pin Active level Frequency fPW [kHz] Step 1 Modulation Step 2 fCY [Hz] Step 3 Step 4 Alarm output Step 1 Step 2 Duty [%] Step 3 Step 4 Step 1 Step 2 Step time [s] Step 3 Step 4 Auto-stop [s] IOH [mA] min. IOL [mA] min. CF5761CA 4 27 - 0.0625 (8Hz sweep) 62.5 (50% duty) HIGH (pull-down) 62.5 HIGH (pull-down) 300 62.5 LOW HIGH Simple alarm Simple alarm AO1, AO3: tone AO1, AO3: tone AO2: motor bell AO2: Magnet speaker AO1 AO2 AO3 AO1 AO2 AO3 H H L H 4 DC 4 2 8 - 8 8 - - - - - - - - - - - - 64Hz 32Hz 50 - 50 50 clock clock - - - - output output - - - - - - - - - - - - - - - - - - - - - - - - None -0.9 0.9 -0.9 0.01 -0.9 0.9 -0.9 0.9 -0.9 0.01 -0.9 0.9 CF5761EA 4 27 LOW 1 23.4 HIGH (pull-down) 62.5 HIGH (pull-down) 300 62.5 LOW Step tone alarm AO1, AO2: motor bell AO1 H - AO2 L - AO3 HIGH Simple alarm AO1, AO2: motor bell AO2 L DC - - - - - - - - - - - - -0.01 0.9 AO3 CF5761HA 4 27 LOW 10 13.7 HIGH (pull-down) 62.5 HIGH (pull-down) 300 62.5 LOW Simple alarm AO1, AO3: tone AO1 H 4 1+16 - - - 50 - - - - - - - -0.9 0.9 AO2 H - 1+16 - - - - - - - - - - - -0.9 0.01 HIGH Simple alarm AO1, AO3: tone AO2 H - - - - - - - - - - - - - -0.9 0.01 AO3 L 4 See special timing in functional description. -0.9 0.9 Not used -0.9 0.9
AI input
SN input
AO1 H DC 1+2+4+8 1+2+4+8 - 1+2+8 1+2+8 - 1+8 1+8 - DC DC - 32kHz 50 50 - F 50 50 - output 50 50 - - - - 0-8 0-8 - 8-16 8-16 - 16-24 16-24 - 24- 24- - None -0.9 0.01 -0.01 0.9 -0.01 0.01 -0.9 0.01
32kHz F output
AO3 AO1 L H 4 4 1+16 - - - 50 - - - - - - - None -0.9 0.9 -0.9 0.9 See special timing in functional description. H 2 1+8 1+8 1+8 - 12.5 25 50 - 0-8 8-16 16- - 300 -0.9 0.9
-0.01 0.01
1. CG and CD built-in parasitic capacitance (CG = CD = 4pF)
Built-in capacitance1 Motor output
AI input
SN input
CG [pF] CD [pF] Active level Needle period tCY [s] Pulsewidth tPW [ms] Active level Bounce delay [ms] Active level Snooze time tSNZ [s] Bounce delay [ms] SEL pin Application Pin Active level
CF5761LB 4 34 LOW 1 31.3 LOW (pull-up) 62.5 LOW (pull-up) 300 62.5 LOW Step volume alarm AO1, AO2: tone AO1 AO2 AO3 H L 2 2 1+8 1+8 1+8 - 6.25 12.5 50 - 0-8 8-16 16- - -0.9 0.9 1+8 1+8 1+8 - 6.25 12.5 50 - 0-8 8-16 16- - -0.9 0.9 HIGH Simple alarm AO1, AO2: motor bell AO1 AO2 AO3 H DC - - - - - - - - - - - - 300 -0.9 0.9 -0.9 0.9 -0.9 0.9 -0.9 0.9 -0.9 0.9 -0.9 0.9 H DC - - - - - - - - - - - -
CF5761MB 4 34 - 0.0625 (8Hz sweep) 62.5 (50% duty) LOW (pull-up) 62.5 LOW (pull-up) 300 62.5 LOW Step volume alarm AO1, AO2: tone AO1 AO2 AO3 H 2 1+8 1+8 1+8 1+8 6.25 12.5 25 50 0-4 4-8 8-12 12- L 2 1+8 1+8 1+8 1+8 6.25 12.5 25 50 0-4 4-8 8-12 12- HIGH Simple alarm AO1, AO2: motor bell AO1 AO2 AO3 H DC - - - - - - - - - - - - 300 -0.9 0.9 -0.9 0.9 -0.9 0.9 -0.9 0.9 -0.9 0.9 -0.9 0.9 H DC - - - - - - - - - - - -
CF5761NB 4 34 LOW 1 23.4 LOW (pull-up) 62.5 LOW (pull-up) 300 62.5 LOW Step volume alarm AO1, AO2: tone AO1 AO2 AO3 H 4 1+8 1+8 1+8 - 6.25 12.5 50 - 0-8 8-16 16- - L 4 1+8 1+8 1+8 - 6.25 12.5 50 - 0-8 8-16 16- - HIGH Step volume alarm AO1, AO2: tone AO1 AO2 AO3 L 2 1+8 1+8 1+8 - 12.5 25 50 - 0-8 8-16 16- - -0.9 0.9
Frequency fPW [kHz] Step 1 Modulation Step 2 fCY [Hz] Step 3 Step 4 Alarm output Step 1 Step 2 Duty [%] Step 3 Step 4 Step 1 Step 2 Step time [s] Step 3 Step 4 Auto-stop [s] IOH [mA] min. IOL [mA] min.
Not used
Not used
Not used
Not used
Not used
-0.9 0.9
1. CG and CD built-in parasitic capacitance (CG = CD = 4pF)
SEIKO NPC CORPORATION --2
CF5761 series
BLOCK DIAGRAM
XT XTN
6-stage divider
5-stage divider
4-stage divider
4-stage divider
Motor output control
T1 AI SN
Test control Alarm input control Snooze input control
Alarm pattern control Alarm output control Alarm pattern select
O1 O2
AO1 AO2 AO3
SEL
PAD DESCRIPTION and DIMENSIONS
Pad dimensions Number 1 2 3 4 5 6 7 8 9 10 Name O1 O2 VSS AO2 AO1 AO3 SEL XTN XT SN I/O O O - O O O I O I I Function X [m] Movement motor drive output 1 (CMOS output) Movement motor drive output 2 (CMOS output) Ground Alarm output 2 Alarm output 1 Alarm output 3 Alarm function select. Pull-down resistor built-in Crystal oscillator output. Oscillator capacitance CD built-in Crystal oscillator input. Crystal connected between XT and XTN Snooze input Pull-down resistor built-in (CF5761CA, EA, HA) Pull-up resistor built-in (CF5761LB, MB, NB) Alarm input Pull-down resistor built-in (CF5761CA, EA, HA) Pull-up resistor built-in (CF5761LB, MB, NB) Test pin Supply 155 155 155 155 155 351 583 1255 1255 1255 Y [m] 1215 1023 835 567 155 155 155 166 399 587
11 12 13
AI T1 VDD
I I/O -
1255 1217 1029
821 1215 1215
SEIKO NPC CORPORATION --3
CF5761 series
SPECIFICATIONS
Absolute Maximum Ratings
Parameter Supply voltage range Input voltage range Operating temperature range Storage temperature range Symbol VDD - VSS VIN Topr Tstg Condition Rating -0.3 to 5.0 VSS to VDD -30 to 80 -65 to 150 Unit V V C C
Electrical Characteristics
1.5V operation Ta = 25C, VSS = 0V, VDD = 1.5V, X'tal (f0 = 32.768kHz, CI = 35k max, CG = 20pF) unless otherwise noted
Rating Parameter Operating voltage Oscillator startup time1 Frequency voltage characteristic Current consumption1 O1, O2 motor output current2 AI HIGH-level input current AI LOW-level input current SN, SEL HIGH-level input current Symbol VDD t1 f/f No output load IDD IOUT IIH1 IIL1 IIH2 IIH3 SN LOW-level input current AO1, AO2, AO3 LOW-level output current3 AO1, AO2, AO3 HIGH-level output current3 T1 LOW-level output current T1 HIGH-level output current F output voltage4 Built-in capacitance 1. 2. 3. 4. IIL2 IIL3 IOL1 IOL2 IOH1 IOH2 IOLT IOHT VF CD No output load, F output VDD = 1.2V, RL = 400 VDD = 1.5V, VIH = 1.5V VDD = 1.5V, VIL = 0V VDD = 1.5V, VIH = 1.5V VDD = 1.5V, VIH = 0.5V VDD = 1.5V, VIL = 0V VDD = 1.5V, VIL = 1.0V VDD = 1.5V, VOL = 0.75V VDD = 1.5V, VOL = 0.75V VDD = 1.5V, VOH = 0.75V VDD = 1.5V, VOH = 0.75V VDD = 1.5V, VOL = 1.5V VDD = 1.5V, VOH = 0V VDD = 1.2V, output capacitance CL = 50pF VDD = 1.2V Condition min 1.2 - - - - 2.40 0.6 0.6 0.2 9 0.2 9 900 10 900 10 5 5 0.4 typ 1.5 - - 0.5 0.9 2.55 3 3 1 18 1 18 2000 30 2000 30 10 10 - See series lineup max 3.6 5.0 1.0 1.0 A 1.8 - 7.5 7.5 2 A 36 2 A 36 - A 100 - A 100 20 20 - A A V pF mA A A V s ppm/0.1V Unit
Measured using standard circuits. RL is the resistance of the motor coil connected between O1 and O2. The rating varies depending on the device selected. Please refer to the series lineup table for details. F output voltage is the difference voltage, with load capacitor CL connected between F and VSS pins, between 0.5VDD and the peak voltage.
SEIKO NPC CORPORATION --4
CF5761 series 3.0V operation Ta = 25C, VSS = 0V, VDD = 3.0V, X'tal (f0 = 32.768kHz, CI = 35k max, CG = 20pF) unless otherwise noted
Rating Parameter Operating voltage Oscillator startup time1 Frequency voltage characteristic Current consumption1 O1, O2 motor output current2 AI HIGH-level input current AI LOW-level input current SN, SEL HIGH-level input current Symbol VDD t1 f/f No output load IDD IOUT IIH1 IIL1 IIH2 IIH3 SN LOW-level input current AO1, AO2, AO3 LOW-level output current3 AO1, AO2, AO3 HIGH-level output current3 T1 LOW-level output current T1 HIGH-level output current F output voltage4 Built-in capacitance 1. 2. 3. 4. IIL2 IIL3 IOL1 IOL2 IOH1 IOH2 IOLT IOHT VF CD No output load, F output VDD = 2.4V, RL = 1k VDD = 3.0V, VIH = 3.0V VDD = 3.0V, VIL = 0V VDD = 3.0V, VIH = 3.0V VDD = 3.0V, VIH = 0.5V VDD = 3.0V, VIL = 0V VDD = 3.0V, VIL = 2.5V VDD = 3.0V, VOL = 1.5V VDD = 3.0V, VOL = 1.5V VDD = 3.0V, VOH = 1.5V VDD = 3.0V, VOH = 1.5V VDD = 3.0V, VOL = 3.0V VDD = 3.0V, VOH = 0V VDD = 2.4V, output capacitance CL = 50pF VDD = 2.4V Condition min 1.2 - - - - 2.26 0.6 0.6 0.2 25 0.2 25 900 10 900 10 - - 0.8 typ 3.0 - - 0.6 1.3 - 3 3 1 50 1 50 - - - - 20 20 - See series lineup max 3.6 5.0 1.0 1.2 A 2.6 - 7.5 7.5 2 A 100 2 A 100 - A - - A - - - - A A V pF mA A A V s ppm/0.1V Unit
Measured using standard circuits. RL is the resistance of the motor coil connected between O1 and O2. The rating varies depending on the device selected. Please refer to the series lineup table for details. F output voltage is the difference voltage, with load capacitor CL connected between F and VSS pins, between 0.5VDD and the peak voltage.
Measurement Circuit
VDD CG XT
T1
A
IO
IDD
A
O1 X'tal II XTN CD O2 RL VDD IAO IO
A A A
VI
AI AO1 SN AO2 SEL VSS AO3
A A A
A A
A
VO
X'tal f0 = 32.768kHz, CI = 35k max, CL = 12.5pF, C0 = 1.3pF, C1 = 2.6pF, CG = 20pF, RL = 400 or 1k SEIKO NPC CORPORATION --5
CF5761 series
FUNCTIONAL DESCRIPTION
Motor Output
The CF5761 series comprise devices with different step movement and sweep movement cycles and pulsewidths.
Parameter Active level Movement cycle tCY [s] Pulsewidth tPW [ms] Movement CF5761CA - 0.0625 62.5 Sweep CF5761EA LOW 1 23.4 Step CF5761HA LOW 10 13.7 Step CF5761LB LOW 1 31.3 Step CF5761MB - 0.0625 62.5 Sweep CF5761NB LOW 1 23.4 Step
Step movement
tPW
VDD O1 VSS
tCY
O2
tCY
VDD VSS
tPW
Sweep movement
VDD O1 VSS VDD O2 VSS
tCY
tCY
tPW
SEIKO NPC CORPORATION --6
CF5761 series
Alarm Control
The alarm is controlled using AI, SN, and SEL inputs. These pins have built-in chattering elimination circuits to prevent incorrect operation due to input chatter. The alarm output timing in response to these inputs is shown in the following figure.
Input AI SN Function Alarm control input. When AI is active, the specified alarm pattern is output on AO1, AO2 and AO3. Snooze function control input. When the snooze input is accepted, the snooze time count begins. The snooze time is 300s. Alarm function select input. Selects one of two alarm patterns. When SEL is switched (from HIGH to LOW, or LOW to HIGH), the snooze state and auto-stop function is released, and the alarm signal is output. tON < 62.5ms, the input is not accepted. tON > 125ms, the input is accepted. 62.5ms tON 125ms, the input state is undefined. Input chatter elimination
SEL
ON AI OFF ON SN OFF B SEL A 5min 5min 5min 5min 5min 5min 5min A B A B A
Alarm output
A
A
B
BA
B
B
B
A
Alarm stops
Snooze released
Auto-stop Auto-stop released
SEIKO NPC CORPORATION --7
CF5761 series
Alarm Modes
The CF5761 series provide several alarm modes and various alarm pattern outputs for a wide range of clock specifications, as described in the following table.
Alarm mode Simple alarm Step tone modulated alarm Step volume modulated alarm Mode description A fixed alarm pattern is repeatedly rung (basic mode). At fixed intervals, the alarm pattern changes, increasing the tone pitch with each step. At fixed intervals, using a fixed alarm pattern, the output waveform duty changes, increasing the volume with each step. Output Motor bell Piezo-electric speaker Electromagnetic speaker Motor bell Piezo-electric speaker Electromagnetic speaker Device CF5761CA/EA/HA/LB/MB
CF5761EA CF5761LB/MB/NB
The alarm pattern timing for each device in the CF5761 series is shown in the series lineup. The CF5761HA has a special modulated alarm pattern when SEL is HIGH, as shown in the following figure. Outputs AO1 and AO3 have a frequency modulated alarm waveform output at the alarm fundamental frequency of 4kHz (4096Hz). The modulation pattern is output on AO2.
1sec 62.5msec 62.5msec 187.5msec 437.5msec
AO1 output
AO3 output
AO2 output
Power-ON Initialization
The CF5761 series are reset to the following conditions after power is applied.
I
I
I
I
AI, SN, SEL input state These inputs are reset to LOW, except where the device has an active-LOW input in which case it is reset to HIGH. See the series lineup table. O1, O2 In step movement devices, both outputs are HIGH and subsequent output occurs on O1. In sweep movement devices, O1 is reset LOW and O2 is reset HIGH, and output starts immediately. AO1, AO2, AO3 No output after reset. However, F output (CF5761EA: 32kHz on AO3) and clock output start immediately. Test mode Test mode is released after reset. Note that after the oscillator starts, the input state of each pin is read and operation commences accordingly.
SEIKO NPC CORPORATION --8
CF5761 series
Test Function
The CF5761 series have a test mode of operation where the output cycles are compressed. T1 has a built-in chattering elimination circuit to prevent incorrect operation due to input chatter. When T1 goes HIGH for an interval of 31.25ms or greater, test mode is invoked. When T1 becomes open circuit, normal mode operation resumes immediately and a 256Hz signal is output on T1.
T1 Function Motor outputs: In step movement devices, the output runs 16 times faster with normal pulsewidth. In sweep movement devices, the output runs 16 times faster with 50% duty pulsewidth. Alarm outputs: Alarm operates at the same frequency with modulation frequency 16 times faster and step output changes 8 times faster (CF5761EA, LB, NB) or 4 times faster (CF5761MB). Snooze time, auto-stop time1: 281.25ms (CF5761EA, LB, NB) or 562.5ms (CF5761MB) in step output alarm mode, and 140.625ms in other modes. 256Hz output (normal operation)
HIGH
Open circuit
1. The auto-stop time applies only to CF5761 versions that support the auto-stop function. See the series lineup table.
TYPICAL APPLICATION CIRCUITS
Piezo-electric speaker Electromagnetic speaker
CG
X'tal
CG
X'tal
XT
XTN
VDD
XT
XTN
VDD
AI AO1 SN AO2 SEL O1 AO3 VSS
AI AO1 SN AO2 SEL O1 AO3 VSS
M
O2
M
O2
Motor bell
Melody alarm
CG
X'tal
CG Motorbell
X'tal
M
XT XTN VDD XT XTN VDD VDD AI AO1 SN AO2 SEL O1 AO3 SEL O1 AO3 VSS F VSS SN Melody IC AO2 AI AO1
M
O2 VSS
M
O2
SEIKO NPC CORPORATION --9
CF5761 series
Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter "Products") are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter "NPC"). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies.
SEIKO NPC CORPORATION
15-6, Nihombashi-kabutocho, Chuo-ku, Tokyo 103-0026, Japan Telephone: +81-3-6667-6601 Facsimile: +81-3-6667-6611 http://www.npc.co.jp/ Email: sales@npc.co.jp
NC0016BE 2006.04
SEIKO NPC CORPORATION --10

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