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ISD2500 Series
Single-Chip Voice Record/Playback Devices 32-*, 40-*, 48-*, 64-*, 60-, 75-, 90-, and 120-Second Durations
FEATURES
• • • Easy-to-use single-chip voice Record/ Playback solution High-quality, natural voice/audio reproduction Manual switch or microcontroller compatible Playback can be edge- or levelactivated Single-chip durations of 32*, 40*, 48*, 64*, 60, 75, 90, and 120 seconds Directly cascadable for longer durations Automatic Power-Down (Push-Button Mode) – Standby current 1 µA (typical) Zero-power message storage – Eliminates battery backup circuits • • • • • • • • Fully addressable to handle multiple messages 100-year message retention (typical) 100,000 record cycles (typical) On-chip clock source No algorithm development required Single +5 volt power supply Available in die form, DIP, SOIC, and TSOP packaging Industrial temperature (-40°C to +85°C) versions available
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ISD2500 SERIES SUMMARY
Part Number ISD2560 ISD2575 ISD2590 ISD25120 Duration (Seconds) 60 75 90 120 Input Sample Rate (KHz) 8.0 6.4 5.3 4.0 Typical Filter Pass Band (KHz) 3.4 2.7 2.3 1.7
ISD2532* ISD2540* ISD2548* ISD2564*
32 40 48 64
8.0 6.4 5.3 4.0
3.4 2.7 2.3 1.7
Information Storage Devices, Inc.
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Advance information: ISD2532/40/48/64 devices.
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ISD2500 Series
Product Data Sheets
GENERAL DESCRIPTION
Information Storage Devices' ISD2500 ChipCorder® Series provides high-quality, single-chip Record/Playback solutions for 32- to 120-second messaging applications. The CMOS devices include an on-chip oscillator, microphone preamplifier, automatic gain control, antialiasing filter, smoothing filter, speaker amplifier, and high density multi-level storage array. In addition, the ISD2500 is microcontroller compatible, allowing complex messaging and addressing to be achieved. Recordings are stored in on-chip nonvolatile memory cells, providing zero-power message storage. This unique, single-chip solution is made possible through ISD's patented multilevel storage technology. Voice and audio signals are stored directly into memory in their natural form, providing highquality, solid-state voice reproduction.
DETAILED DESCRIPTION
Speech/Sound Quality
The ISD2500 Series includes devices offered at 4.0, 5.3, 6.4, and 8.0 KHz sampling frequencies, allowing the user a choice of speech quality options. Increasing the duration within a product series decreases the sampling frequency and bandwidth, which affects sound quality. Please refer to the ISD2500 Series Summary table on page 1-79 to compare filter pass band and product durations. The speech samples are stored directly into onchip nonvolatile memory without the digitization and compression associated with other solutions. Direct analog storage provides a very true, natural sounding reproduction of voice, music, tones, and sound effects not available with most solid-state digital solutions.
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Duration
To meet end system requirements, the ISD2500 Series offers single-chi.