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ISD2548 Datasheet Preview

ISD2548 Datasheet

(ISD2500 Series) Single-Chip Voice Record/Playback Devices

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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 compati-
ble Playback can be edge- or level-
activated
• 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
1
ISD2500 SERIES SUMMARY
Part
Number
Duration
(Seconds)
ISD2560
ISD2575
ISD2590
ISD25120
ISD2532*
ISD2540*
ISD2548*
ISD2564*
60
75
90
120
32
40
48
64
Input Sample
Rate (KHz)
8.0
6.4
5.3
4.0
8.0
6.4
5.3
4.0
Typical Filter
Pass Band (KHz)
3.4
2.7
2.3
1.7
3.4
2.7
2.3
1.7
Information Storage Devices, Inc.
* Advance information: ISD2532/40/48/64 devices.
1–79



ISD
ISD

ISD2548 Datasheet Preview

ISD2548 Datasheet

(ISD2500 Series) Single-Chip Voice Record/Playback Devices

No Preview Available !

ISD2548 pdf
ISD2500 Series
Product Data Sheets
GENERAL DESCRIPTION
Information Storage Devices' ISD2500 Chip-
Corder® 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 pream-
plifier, automatic gain control, antialiasing filter,
smoothing filter, speaker amplifier, and high den-
sity 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 mem-
ory cells, providing zero-power message storage.
This unique, single-chip solution is made possible
-1 through ISD's patented multilevel storage technol-
ogy. Voice and audio signals are stored directly
into memory in their natural form, providing high-
quality, 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 on-
chip 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.
Duration
To meet end system requirements, the ISD2500
Series offers single-chip solutions at 32*, 40*, 48*,
64*, 60, 75, 90, and 120 seconds. Parts may also
be cascaded together for longer durations.
ISD2560/75/90/120 DEVICE BLOCK DIAGRAM
XCLK
ANA IN
ANA OUT
MIC
MIC REF
AGC
Internal Clock
Timing
Sampling Clock
Amp
5-Pole Active
Antialiasing Filter
Pre-
Amp
Automatic
Gain Control
(AGC)
Analog Transceivers
480 K Cell
Nonvolatile
Multilevel Storage
Array
Power Conditioning
Address Buffers
R
5-Pole Active
Smoothing Filter
Mux Amp
Device Control
VCCA VSSA VSSD VCCD A0 A1 A2 A3 A4 A5 A6 A7 A8 A9
PD OVF P/R CE EOM AUX IN
1–80
* Advance information: ISD2532/40/48/64 devices.
SP+
SP–


Part Number ISD2548
Description (ISD2500 Series) Single-Chip Voice Record/Playback Devices
Maker ISD
Total Page 28 Pages
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