isd4004 Winbond Electronics Corp America, isd4004 Datasheet - Page 12

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isd4004

Manufacturer Part Number
isd4004
Description
Single-chip Voice Record/playback Devices 8-, 10-, 12-, And 16-minute Durations
Manufacturer
Winbond Electronics Corp America
Datasheet

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7. FUNCTIONAL DESCRIPTION
Audio Quality
The Winbond’s ISD4004 ChipCorder
frequencies, allowing the user a choice of speech quality options. Increasing the sampling frequency
will produce better sound quality, but affects duration. Please refer to Table 1: Product Summary for
details.
Analog speech samples are stored directly into on-chip non-volatile memory without the digitization
and compression associated with other solutions. Direct analog storage provides higher quality
reproduction of voice, music, tones, and sound effects than other solid-state solutions.
Duration
The ISD4004 Series is a single-chip solution with 8-, 10-, 12-, and 16-minute duration.
* This is the –3dB point. This parameter is not checked during production testing and may vary due to process
variations and other factors. Therefore, the customer should not rely upon this value for testing purposes.
Flash Storage
The ISD4004 series utilizes on-chip Flash memory, providing zero-power message storage. The
message is retained for up to 100 years typically without power. In addition, the device can be re-
recorded typically over 100,000 times.
Memory Architecture
The ISD4004 series contains a total of 3,840K Flash memory cells, which is organized as 2,400 rows
of 1,600 cells each. The address bits (A0-A15) are used to access various rows for multiple messages
of different durations.
7.1. D
ISD4004-08M
ISD4004-10M
ISD4004-12M
ISD4004-16M
Part Number
ETAILED
D
ESCRIPTION
TABLE 1: PRODUCT SUMMARY OF ISD4004 SERIES
(Minutes)
Duration
10
12
16
8
®
series is offered at 8.0, 6.4, 5.3 and 4.0 kHz sampling
- 12 -
Sample Rate
(kHz)
8.0
6.4
5.3
4.0
ISD4004 SERIES
Typical Filter Pass
Band (kHz) *
3.4
2.7
2.3
1.7

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