ISSI ISSI(R) IS22C020 IS22C020 16 to 20 SEC INSTANT VOICE ROM (R) OCTOBER 1998 FEATURES * Voice length at: - 8 KHz sampling is 16 seconds - 6 KHz sampling is 20 seconds * Silence compression saves memory * Four trigger pins, S1 to S4 for eight sections * SBT pin play-all or sequential play-all * 15 ms debounce suitable for CDs * IRP interrupt pin stops playback at once * STP stop pulse generated at playback end * BUSY signal for CPU control * Two LEDs flash at 3 Hz * * * * * * * * * * * * 2.4V to 6V single power supply operation Low standby current (<5 A at 3V) Auto power-down Built-in oscillator, D/A converter, EPROM ADPCM data compression Optional pop noise elimination function COUT pin drives speaker with a transistor Development tool support VOUT1 and VOUT2 drives buzzer directly Sampling rate determined by an external resistor Holdable and unholdable triggering option Industrial temperature available GENERAL DESCRIPTION The IS22C020 is a high-quality voice synthesizer with capacity from 16 to 20 seconds. A proprietary ADPCM algorithm is used. The audio message is stored in a 512K bit on-chip one-time programmable memory. The IS22C020 eliminates the need for complicated circuitry in voice playback but still achieves high voice quality. Sounds such as human speech, animal sounds, musical sounds, and even special effects can be synthesized. Devices can be cascaded to achieve longer voice duration. Two devices can be configured in parallel in order to achieve signal mixing without an external mixer so speech can be mixed with background music each from one of two different chips. The instant programming nature of the IS22C020 gives a very short turn around time free of NRE charges usually required with conventional voice ROMs. Users now can add a voice synthesis function as an additional feature to their products even when production volume is small. As a result, initial investment is minimal and the risk in the product development phase is reduced. The IS22C020 provides wide voltage operating range from 2.4V to 6.0V. A pair of PWM output pins, VOUT1 and VOUT2, provide direct drive to a buzzer. Voice quality is comparable to a speaker output and power consumption is much lower. This facilitates button battery applications such as greeting cards. A current output pin, COUT, enables the device to drive a speaker through a low cost NPN transistor. No complex filtering or amplifier circuit is needed. An automatic ramp-up and ramp-down function eliminates undesired noise at the beginning and end of playback. Up to eight sections are available and accessible through the S1 to S4 trigger pins. The SBT trigger pin can be programmed to playback all eight sections or sequentially from section 1 to 8. An interrupt pin (IRP), stop pulse (STP) or BUSY signals provide handshaking with P or other IS22C020 devices. All trigger pins give 15 ms debounce time and are ideal for CDS applications. Two LED drivers are available, flashing on and off approximately at 3 Hz. The internal voltage compensated oscillator requires only one external resistor. Different sampling frequencies are determined by the external oscillator resistor value. ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors which may appear in this publication. (c) Copyright 1998, Integrated Silicon Solution, Inc. Integrated Silicon Solution, Inc. VP002-1C 10/01/98 1 ISSI IS22C020 (R) SEGMENT DECODE Programmable Options The IS22C020 provides programmable user specified control functions. They include: * Non-sequence or Sequence play-all * Unholdable or Holdable trigger 1 2 3 4 5 6 7 8 S1 H L L L H L L H S2 L H L L H H L L S3 L L H L L H H L S4 L L L H L L H H * STOP or BUSY signal selection * Automatic ramp-up and ramp-down or no ramp-up or ramp-down SAMPLE FREQUENCY 3.5 Silence Compression 3.0 If a particular sound sequence includes periods of silence, the IS22C020 will automatically compress the silence to save memory space. This compression will not affect playback of the sound sequence. 2.5 ROSC (M) 2.0 1.5 1.0 0.5 0 5 6 7 8 9 10 11 12 13 14 15 SAMPLE FREQUENCY (KHz) Typical Value, Vcc = 4.5V BLOCK DIAGRAM OSC OSCILLATOR VCC ADDRESS SEQUENCER EPROM GND CLOCK GENERATOR S1 S2 S3 S4 SBT IRP LED1 LED2 STP/BUSY 2 ADPCM DECODER CONTROL LOGIC D/A COUT POP NOISE REDUCTION LED DRIVER BUZZER BUFFER VOUT1 VOUT2 Integrated Silicon Solution, Inc. VP002-1C 10/01/98 ISSI IS22C020 (R) PIN DESCRIPTIONS PIN CONFIGURATIONS 16-Pin DIP and SOP LED1 Drives First LED Flash at 3 Hz (Active LOW) VOUT1 PWM Audio Signal Output for Buzzer STP/BUSY Generate Busy Signal or 30 ms Pulse after Voice Playback LED1 1 16 IRP VOUT1 2 15 SBT VOUT2 3 14 S4 GND Ground GND 4 13 S3 VOUT2 Compliment PWM Audio Signal Output for Buzzer STP/BUSY 5 12 VCC LED2 Drives Second LED Flash at 3 Hz (Active LOW) LED2 6 11 S2 COUT COUT 7 10 S1 Current Output from Internal DAC for Speaker Playback OSC 8 9 OSC Oscillator Resistor Pin to Control Sampling Frequency VPP Program Power Supply, No Connect during Playback S1-S4 Input Switches, Internal Pull LOW, Active HIGH SBT One Key or Sequential Trigger, Internal Pull LOW, Active HIGH IRP Interrupt to Stop Playback, Internal Pull LOW, Active HIGH Vcc Power Supply Voltage VPP BONDING DIAGRAM BONDING PARAMETERS Pin Name X Y 5 4 1 LED1 3288.75 1200 6 3 2 VOUT1 3288.75 1459 3 VOUT2 3288.75 1687 4 GND 3288.75 1894 5 STP 86.25 1875 6 LED2 86.25 1635 2 7 1 Y 8 NC 9 16 10 15 7 COUT 86.25 1440 11 14 8 OSC 86.25 1027 12 13 9 VPP 86.25 742 10 S1 86.25 465 11 S2 86.25 270 12 Vcc 86.25 82 13 S3 3288.75 88 14 S4 3288.75 296 15 SBT 3288.75 502 16 IRP 3288.75 742 X (0,0) Note: Substrate must be connected to GND Pad size = 95 m x 95 m Note: Programming requires connection to pins 4, 5, 6, 8, 9, 12, 15, and 16. Integrated Silicon Solution, Inc. VP002-1C 10/01/98 3 ISSI IS22C020 (R) ABSOLUTE MAXIMUM RATINGS(1) Symbol VTERM TBIAS TSTG Parameter Terminal Voltage with Respect to GND Temperature Under Bias Storage Temperature Value -0.5 to +7.0 -40 to +85 -55 to +125 Unit V C C Notes: 1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. DC CHARACTERISTICS Symbol Parameter Description Test Conditions Min. Typ. Max. Unit VCC VIH VIL IOH IOL Operating Voltage Input HIGH Voltage Input LOW Voltage VOUT HIGH Operating Current VOUT LOW Operating Current COUT Operating Current STP HIGH Operating Current STP LOW Operating Current LED Output Current Standby Current Operating Current Frequency Stability Vcc = 3.0V Vcc = 2.0V Vcc = 3.0V, VOUT = 3.0V Vcc = 3.0V, VOUT = 0V Vcc = 3.0V, VCOUT = 0.7V Vcc = 3.0V, VSTP = 3.0V Vcc = 3.0V, VSTP = 0V Vcc = 2.2V - 6.0V Vcc = 3.0V, I/O Open Vcc = 3.0V, I/O Open 1 - FOSC(3.5V)/FOSC(3.0V) 2.4 2.5 -0.3 -- -- -- -- -- 6 -- -- -- 3.0 3.0 0 -12 12 -2 -5 5 8 1 -- -- 6.0 3.5 0.3 -- -- -- -- -- 10 5 100 5 V V V mA mA mA mA mA mA A A % ICO ISTPH ISTPL ILED ISB IOP F/F AC SWITCHING CHARACTERISTICS Symbol Parameter Description tDD tST Debounce Delay Stop Pulse Width OPERATING RANGE Typ. Unit Range Ambient Temp. Vcc 15 30 ms ms Commercial Industrial 0C to +70C -40C to +85C 2.4V to 6.0V 2.4V to 6.0V SWITCHING WAVEFORMS S1 to S4 SEGMENT TRIGGERS. PULSE TRIGGERED. a. Trigger is shorter than a phrase output b. Trigger is longer than a phrase output S1 S2 COUT Phrase 2 Phrase 1 Phrase 2 Phrase 2 LED STP 4 Integrated Silicon Solution, Inc. VP002-1C 10/01/98 ISSI IS22C020 LEVEL TRIGGERED a. Trigger is shorter than a phrase output (R) b. Trigger is longer than a phrase output S1 S2 COUT Phrase 2 Phrase 1 Phrase 2 Phrase 2 LED SWITCHING WAVEFORMS SINGLE BUTTON TRIGGER, NONSEQUENTIAL (SBT) a. Pulse Triggered SBT COUT Phrase 1 Phrase 2 Phrase N Phrase 1 Phrase N Phrase 1 b. Level Triggered SBT COUT Phrase 1 Phrase 2 Phrase 1 Phrase N Phrase 1 SINGLE BUTTON TRIGGER, SEQUENTIAL (SBT) a. Pulse Triggered SBT COUT Phrase 1 Phrase 2 Phrase 2 Phrase 2 Phrase N Phrase 1 b. Level Triggered SBT COUT Phrase 1 Integrated Silicon Solution, Inc. VP002-1C 10/01/98 Phrase 2 Phrase 2 Phrase 2 Phrase N Phrase 1 5 ISSI IS22C020 (R) APPLICATION CIRCUITS TYPICAL APPLICATION Vcc ROSC SP OSC S1 S2 S3 S4 SBT IRP Vcc VOUT1 ROSC OSC COUT S1 S2 S3 S4 SBT IRP GND VOUT2 PIEZO BUZZER GND CASCADE APPLICATION Vcc ROSC Vcc ROSC OSC SP OSC COUT COUT SBT SBT IRP STP IRP GND 6 GND Integrated Silicon Solution, Inc. VP002-1C 10/01/98 ISSI IS22C020 (R) APPLICATION CIRCUITS PARALLEL APPLICATION Vcc ROSC OSC Vcc ROSC SP OSC COUT S1 S2 S3 S4 SBT IRP COUT S1 S2 S3 S4 SBT IRP GND GND LED APPLICATION VCC ROSC SP OSC S1 S2 S3 S4 SBT IRP COUT LED2 LED1 GND Notes: The following are typical values: 1. ROSC = 2 M. 2. of N (NPN transistor) > 130. 3. SP = 8. 1/4W. 4. Piezo buzzer resonant frequency = 1 KHz. Integrated Silicon Solution, Inc. VP002-1C 10/01/98 7 ISSI IS22C020 (R) APPLICATION CIRCUITS CDS APPLICATION VCC ROSC SP OSC CDS COUT SBT IRP GND 8-SEGMENT TRIGGER APPLICATION SW8 VCC ROSC SW5 OSC SW1 SW6 SP S1 COUT SW2 S2 SW7 SW3 SW4 S3 S4 GND Notes: The following are typical values: 1. ROSC = 2 M. 2. of N (NPN transistor) > 130. 3. SP = 8. 1/4W. 4. Piezo buzzer resonant frequency = 1 KHz. 8 Integrated Silicon Solution, Inc. VP002-1C 10/01/98 ISSI IS22C020 (R) ORDERING INFORMATION Commerical Range: 0C to +70C Order Part No. Package IS22C020X Unpackaged IS22C020P 300-mil Plastic DIP IS22C020S 300-mil Plastic SOP Industrial Range: -40C to +85C Order Part No. Package IS22C020XI Unpackaged IS22C020PI 300-mil Plastic DIP IS22C020SI 300-mil Plastic SOP NOTICE Integrated Silicon Solution, Inc., reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. Integrated Silicon Solution, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, Integrated Silicon Solution, Inc. shall not be liable for any damages arising as a result of any error or omission. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of Integrated Silicon Solution, Inc. is adequately protected under the circumstances. Copyright 1998 Integrated Silicon Solution, Inc. Reproduction in whole or in part, without the prior written consent of Integrated Silicon Solution, Inc., is prohibited. ISSI (R) Integrated Silicon Solution, Inc. 2231 Lawson Lane Santa Clara, CA 95054 Tel: 1-800-379-4774 Fax: (408) 588-0806 e-mail: sales@issiusa.com http://www.issiusa.com Integrated Silicon Solution, Inc. VP002-1C 10/01/98 9