CF5762AB0 Analog Chime Clock CMOS IC OVERVIEW FEATURES ■ ■ ■ ■ ■ ■ ■ ina ry The CF5762AB0 is an analog chime clock CMOS IC that uses a 4.194304MHz crystal oscillator source. It can play a melody and hour chime when triggered by an hourly signal. It generates output sound using dual pitch synthesis (DPS) to produce high-tone quality melodies and chime signals. 4.2MHz fundamental oscillator frequency 1.5V and 3.0V supply voltages (VDD − VSS) 8Hz sweep Melody switching function (SEL1 and SEL2) • choice of 4 melodies played hourly Chime output using time detection circuit Dual pitch synthesis (DPS) sound generator BTL-configuration melody output circuit PAD LAYOUT (Unit: mm) S4 N.C. ■ ■ ■ ■ S3 N.C. 2 simultaneous output pitches Busy (play) signal control output (ATN) Melody stop when dark (CDS and CO4N) • melody stop using an external CdS element Melody stop at night (AMI and PMI) Reset function Chattering elimination function S2 lim MT ■ ■ S1 N.C. O1 O2 (3.44, 2.58) RESET N.C. XTN VDD XT PMI N.C. AMI N.C. NPC VSS pre VOL (0,0) SP SEL2 HA5762 N.C. SEL1 WSEL SPN MSBN MSB ATN CO4N CDS Chip size: 3.44 × 2.58mm Chip thickness: 300 ± 30µm NIPPON PRECISION CIRCUITS INC.—1 CF5762AB0 PAD DESCRIPTION/DIMENSIONS Dimensions (µm) Name RESET Description Input/output Reset input Input with pull-down X Y 235 2283 No connection (leave open circuit) 234 2049 XTN Oscillator output 235 1786 XT Oscillator input 235 1553 NC No connection (leave open circuit) 234 1289 NC No connection (leave open circuit) 235 1017 NC No connection (leave open circuit) 235 829 VSS 0V supply 235 618 VOL Volume adjust input Resistance connection input 235 430 SP Audio output (9-bit current output D/A) P-channel output 381 185 SPN Audio output (9-bit current output D/A) P-channel output 908 185 CMOS output 1260 185 CMOS output 1780 185 CMOS output 2172 185 CMOS output 2488 185 Input with pull-up when inactive 2808 185 Input with pull-down 3205 331 MSBN Audio output (sign bit) MSB Audio output (sign bit) ATN Control signal output ina ry NC Melody stop when dark (CdS) output CDS Melody stop when dark (CdS) input WSEL Waveform select input SEL1 Melody select input 1 Input with pull-down 3205 565 SEL2 Melody select input 2 Input with pull-down 3205 923 AMI Melody stop at night input Input with pull-down 3205 1156 PMI Melody stop at night input Input with pull-down 3205 1514 VDD 1.5V supply (IC substrate) 3205 1725 lim CO4N Clock movement motor drive output 2 CMOS output 3211 2395 O1 Clock movement motor drive output 1 CMOS output 3020 2395 NC No connection (leave open circuit) 2768 2395 S1 Time detect input 1 Input with pull-down 2409 2395 Input with pull-down 2174 2395 1815 2395 1540 2395 1181 2395 pre O2 S2 Time detect input 2 NC No connection (leave open circuit) S3 Time detect input 3 NC No connection (leave open circuit) S4 Time detect input 4 Input with pull-down 906 2395 MT Hourly signal input Input with pull-down 548 2395 Input with pull-down NIPPON PRECISION CIRCUITS INC.—2 CF5762AB0 SPECIFICATIONS Absolute Maximum Ratings Supply voltage range Input voltage range Storage temperature range Operating temperature range Electrical Characteristics Symbol Condition Rating Unit VDD − VSS −0.3 to 5.0 V VIN VSS to VDD V ina ry Parameter Tstg −65 to 150 °C Topr −30 to 80 °C VDD = 1.5V, VSS = 0V, Ta = 25°C, f0 = 4.194304MHz, CI = 150Ω, CG = CD = 15pF unless otherwise noted Rating Parameter Symbol Condition Unit min typ max Minimum operating voltage1 VDD (min) fOSC ≈ f0 – – 1.2 V Maximum operating voltage1 VDD (max) fOSC ≈ f0 3.6 – – V Operating current consumption (non-play mode)1 Operating current consumption (play mode)1 Oscillator start-up time1 IDD1 fOSC ≈ f0, outputs open – 20 50 µA IDD2 fOSC ≈ f0, outputs open – 60 150 µA fOSC ≈ f0, VDD = 1.2V – – 5.0 s t1 Frequency-voltage characteristic2 ε1, ε2 fOSC (1.5V) – – 2.0 ppm Output saturation resistance3 Rout VDD = 1.2V, RL = 400Ω – 70 100 Ω lim Input current 1 (MT, RESET, WSEL, SEL1, SEL2, AMI, PMI)4 IIH1 VDD = 1.5V, VIH = 1.5V 0.4 1.0 2.0 µA Input current 2 (S1 to S4)4 IIH2 VDD = 1.5V, VIH = 1.5V 1.0 2.0 4.0 µA Input current 3 (CDS)4 IIL1 VDD = 1.5V, VIL = 0V 1.0 2.0 4.0 µA IOL1 VDD = 1.2V, VOL = 0.2V 200 500 1000 µA IOH1 VDD = 1.2V, VOH = 0.2V 200 500 1000 µA IOL2 VDD = 1.2V, VOL = 0.2V 200 500 1000 µA IOH2 VDD = 1.2V, VOH = 1.0V 50 100 200 µA IOL3 VDD = 1.2V, VOL = 0.6V 1.5 – – mA IOH3 VDD = 1.2V, VOH = 0.6V 1.5 – – mA IOH4 VDD = 1.2V, VOH = 0.6V 0.7 1.0 1.3 mA VDD = 1.5V 40 45 50 kΩ Output current 1 (CO4N)5 Output current 2 (ATN)5 Output current 3 (MSB, MSBN)5 pre Output current 4 (SP, SPN)5 Volume 0 resistance6 RVOL0 External capacitance (XT) CG 5 15 36 pF External capacitance (XTN) CD 5 15 36 pF 1. Measured using “Measurement Circuit” with fOSC ≈ f0 ± 30ppm, functions auto-start normally. 2. ε1 = ε (1.2V) = |[f (1.2V) − f (1.5V)] / f (1.5V)| ε2 = ε (1.7V) = |[f (1.7V) − f (1.5V)] / f (1.5V)| 3. Load resistor RL connected between outputs O1 and O2. If VOUT is the voltage wave maximum value across the resistor, then Rout is given by: Rout = (VDD / VOUT − 1) × RL = (1.2(V) / VOUT − 1) × 400(Ω) 4. The IIH and IIL ratings are for each input when short circuited to VDD or VSS. IIL1 is the current when CDS is inactive (when CO4N output is HIGH). NIPPON PRECISION CIRCUITS INC.—3 CF5762AB0 5. Output current (IOL, IOH) measured using the following circuit. IOH4 is measured with a 10kΩ resistor connected to VOL. IOL VDD A Measurement pin VDD IOH ina ry VOL VSS 10kΩ VOH VOL S2 WSEL SEL1 ATN S3 MSB MSBN VOL SPN VSS XT XTN RESET S4 MT CDS CO4N lim 1.5V SEL2 S1 AMI O1 Parallel O2 RL PMI Measurement Circuit VDD 6. Volume 0 resistance is the resistance connected between VOL and VSS for which the SP and SPN output current is less than 100nA. SP Oscillator CG VOL pre CD f0 = 4.194304MHz, CG = 15pF, CD = 15pF, RL = 400Ω, VOL = 50kΩ NIPPON PRECISION CIRCUITS INC.—4 CF5762AB0 FUNCTIONAL DESCRIPTION Motor Output Sweep movement frequency: 8Hz ina ry The pulse cycle (Tcy) and the pulsewidth (Tpw) correspond to 1/16 Sec (= 62.5ms). Tpw VDD O1 VSS Tcy Tcy VDD O2 VSS Tpw Figure 1. Motor pulse output Reset Melody reset If a reset occurs during melody or chime output, the output stops immediately. During reset, the MT is valid when it is input. When the MT pin is HIGH, the reset signal is valid if input. lim All functions are reset when RESET goes HIGH. The reset is released when RESET goes LOW or open circuit (RESET has a built-in pull-down resistor). Clock movement reset For step clock movement, the seconds are stopped. When reset is released, the next pulse is output on the opposing output pin to that immediately before the reset was applied. The time delay until the pulse output after reset is released is 1 + 0.0625 seconds. –0 Time reset During the timing between reset and the hourly signal input when the melody select pins (SEL1, SEL2) are used to monitor, chime monitoring is inactive while melody monitoring is active. pre For sweep clock movement, both outputs O1 and O2 are held HIGH during reset. NIPPON PRECISION CIRCUITS INC.—5 CF5762AB0 Chattering Elimination Input Description S1 to S4, CDS, WSEL MT, RESET No chattering elimination function If the input goes HIGH and continues for 2 or more 16Hz cycles, then the input is recognized, otherwise it is ignored. If the input goes LOW, it is sampled at 16Hz. If the input changes state and continues for 2 or more 16Hz cycles, then the input is recognized, otherwise it is ignored. SEL1, SEL2 The inputs are sampled periodically at 16Hz. If either SEL1 or SEL2 changes state, the state is held for 62.5ms and then the state of both SEL1 and SEL2 are read. If either SEL1 or SEL2 changes state during this interval, a further interval of 62.5ms is added before reading the input states (see figure 2). 16Hz SEL1 SEL2 Read hold pulse Status read clock ina ry AMI, PMI 62.5ms 62.5ms 62.5ms lim 62.5ms 62.5ms Figure 2. SEL1, SEL2 read timing Power-ON Initialization When power is applied, the following reset functions take place. ■ pre ■ Clock movement motor outputs (O1, O2) After the oscillator starts, each output is activated with O1 being LOW and O2 being HIGH. Reset (RESET) After power is applied, a 62.5ms reset pulse is output. If, however, RESET is HIGH when power is applied, the corresponding reset state is recognized as-is. Melody trigger (MT) If MT is HIGH when power is applied, melody output stops. Melody output starts when MT goes LOW and then goes HIGH again. ■ ■ ■ ■ Time information (S1 to S4) The time data is reset to a zero state not representing any hour in the range 1 to 12 o’clock, and the inputs are not read until the next hourly signal input. Melody switching function (SEL1, SEL2) When power is applied, the input states are reset and then immediately read in. Melody stop at night (AMI, PMI) When power is applied, the PM flag is set to LOW (AM setting) and then, immediately, the input states are read in. If at this time both AMI and PMI are HIGH, then the PM flag stays set to LOW. NIPPON PRECISION CIRCUITS INC.—6 CF5762AB0 MELODY FUNCTION DESCRIPTION Melodies There are 4 melodies stored, and which can be played hourly. Time Function <Melody conditions> ina ry If the following conditions are satisfied when a HIGH-level hourly signal is input on MT, then hourly melody output occurs. The hourly melody is a combination of melody output and subsequent chime signals. MT has a built-in pull-down resistor. The number of chimes played are determined by time detection in 12-hour mode. 1. The hourly signal turns OFF once before turning ON 2. Melody stop at night function is not set for current time interval (see “Melody Stop at Night”) 3. Melody stop when dark function is not active (see “Melody Stop when Dark”) If S1 to S4 are all HIGH (no chime), then condition number 2 is ignored. If the time information inputs change state and an hourly signal on MT is input during melody output, the output stops and then starts again under the new conditions. Melody Select Switching <Melody switch function> lim The melody to be played is selected by the state of SEL1 and SEL2. SEL1 and SEL2 have built-in pulldown resistors. Melody (hourly signal) SEL1 SEL2 LOW LOW Melody 1 + chime HIGH LOW Melody 2 + chime LOW HIGH Melody 3 + chime HIGH HIGH Melody 4 + chime Time Detection pre The time information inputs are only read when the hourly signal is input on MT. At all other times the internal data does not change, even if the time information inputs change state. The hours 1 through 12 are represented in 12-hour mode with an internal PM flag. The PM flag reverses state when the hour switches from 11 to 12, or from 12 to 11 if the time setting is being reversed to adjust to the correct time. When the S1 to S4 inputs are all HIGH, the melody output plays without chimes. These inputs determine the time detection and are read into internal registers when the hourly signal is input on MT. Other input combinations not shown are invalid. S1 to S4 have built-in pull-down resistors. S4 S3 S2 S1 Time LOW LOW LOW HIGH 1 o’clock LOW LOW HIGH LOW 2 o’clock LOW LOW HIGH HIGH 3 o’clock LOW HIGH LOW LOW 4 o’clock LOW HIGH LOW HIGH 5 o’clock LOW HIGH HIGH LOW 6 o’clock LOW HIGH HIGH HIGH 7 o’clock HIGH LOW LOW LOW 8 o’clock HIGH LOW LOW HIGH 9 o’clock HIGH LOW HIGH LOW 10 o’clock HIGH LOW HIGH HIGH 11 o’clock HIGH HIGH LOW LOW 12 o’clock LOW LOW LOW LOW No change HIGH HIGH HIGH HIGH No chime NIPPON PRECISION CIRCUITS INC.—7 CF5762AB0 Melody Stop at Night AMI PMI Melody output LOW LOW Always enabled LOW HIGH Disabled during PM hours (PM flag is HIGH) HIGH LOW Disabled during AM hours (PM flag is LOW) ina ry The melody output can be disabled at night by the state of AMI and PMI. This function disables the melody output from 11:00PM to 5:45AM, inclusive. AMI and PMI have built-in pull-down resistors. HIGH HIGH Always disabled Note that when used together with the melody stop when dark function, melody output can be disabled by either function. Melody Stop when Dark When a CdS element and resistor is connected between CO4N and VDD with the mid-point potential connected to CDS, the CDS input can be used to detect the brightness and to stop melody output when the surroundings become dark. CdS element CDS Melody output LOW Disabled due to darkness HIGH Enabled CDS CO4N lim The CDS input has a built-in pull-up resistor when inactive. This pull-up is switched off when CO4N output is LOW. CO4N goes LOW in response to the hourly signal input on MT signal. The melody play output is then disable/enabled depending on the state of the CDS input. VDD If this function is not used, the CDS input must be tied HIGH. pre Note that when used together with the melody stop at night function, melody output can be disabled by either function. Figure 3. Darkness detection circuit MT etc CO4N Read clock (on rising edge) 11.719ms 15.625ms Pull-up Open Pull-down HIGH:play mode (light) CDS LOW:non-play mode (dark) Figure 4. Darkness detection timing Melody Play Mode The melody output plays in complete one-shot mode only. A complete one-shot melody plays through to the end of a whole melody and does not start again as long as the current melody play conditions do not change, even if the hourly signal is input again. However, if during melody play the melody output stops or other melody start conditions change, the current melody output may stop. NIPPON PRECISION CIRCUITS INC.—8 CF5762AB0 Dual Pitch Synthesis (DPS) NORMAL waveform data lope functions are added, and then the resulting pitches are mixed (added) to generate output pitches. ina ry Separate A and B pitches are processed by reading a single set of waveform data at slightly varying frequencies to create a chorus effect, to which an enve- Envelope Shift CHORUS waveform data Pitch A Pitch B Envelope Mixer output Figure 5. Dual pitch synthesis block diagram lim Number of Simultaneous Pitches There are a maximum of 2 pitches with 2 pitch colors that can be generated simultaneously. These are the A and B normal melody (normal waveform) and chorus (chorus waveform) pitches. Dynamic Range The range of pitches stored in Note-ROM is C3 to C6. Waveform Data pre There are 2 waveform data sets that are stored in Wave-ROM: Wave data 0 and Wave data 1. When WSEL is LOW or open circuit, pitch synthesis uses the preassigned waveform data sets. When WSEL is HIGH, all pitch synthesis uses the wave data 1 set. If the waveform data assignment is changed mid melody, subsequent pitch sounds generated will change because the data waveform used for pitch synthesis changes immediately in response to WSEL, even during pitch synthesis. NIPPON PRECISION CIRCUITS INC.—9 CF5762AB0 Melody Output Circuit (PNP × 2, NPN × 2) which are used to drive a speaker. The D/A converter is a 2-pin (SP and SPN) 9-bit Pchannel current adder which, together with MSB and MSBN outputs, is used to drive 4 external transistors In addition, the volume adjust pin (VOL) can be used to adjust the volume by connecting an external 10kΩ resistor between VOL and VSS. ina ry The melody output circuit employs a BTL configuration. VDD VDD MSB MSBN lim SPN SP VOL VSS VOL VSS Figure 6. BTL output pre Control Signal Output A LOW-level active busy signal is output from ATN whenever a melody output is playing. NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome, Koto-ku, Tokyo 135-8430, Japan Telephone: +81-3-3642-6661 Facsimile: +81-3-3642-6698 http://www.npc.co.jp/ Email: [email protected] NP0014AE 2000.10 NIPPON PRECISION CIRCUITS INC.—10