I14305E
| Model | I14305E |
| Description | Speech Synthesizer With RCDG, 300s, CMOS, PDSO28, 8 X 13.40 MM, PLASTIC, TSOP1-28 |
| PDF file | Total 38 pages (File size: 393K) |
| Chip Manufacturer | WINBOND |
ISD4003 SERIES
7. FUNCTIONAL DESCRIPTION
7.1. D
ETAILED
D
ESCRIPTION
Audio Quality
The Winbond’s ISD4003 ChipCorder
®
series is offered at 8.0, 6.4, 5.3 and 4.0 kHz sampling
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 ISD4003 Series is a single-chip solution with 4-, 5-, 6-, and 8-minute duration.
TABLE 1: PRODUCT SUMMARY OF ISD4003 SERIES
Part Number
ISD4003-04M
ISD4003-05M
ISD4003-06M
ISD4003-08M
Duration
(Minutes)
4
5
6
8
Sample Rate
(kHz)
8.0
6.4
5.3
4.0
Typical Filter Pass
Band (kHz) *
3.4
2.7
2.3
1.7
* 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 ISD4003 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 ISD4003 series contains a total of 1,920K Flash memory cells, which is organized as 1,200 rows
of 1,600 cells each.
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