ISD2575 WINBOND [Winbond], ISD2575 Datasheet - Page 10

• Manufacturer Part Number: ISD2575
• Description: ISD2560
• Manufacturer: WINBOND [Winbond]

7. FUNCTIONAL DESCRIPTION
Speech/Sound Quality
The Winbond’s 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 the sound quality.
Please refer to the ISD2560/75/90/120 Product Summary table below to compare the duration,
sampling frequency and filter pass band.
The speech samples are stored directly into the on-chip nonvolatile memory without any digitization
and compression associated like 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 various system requirements, the ISD2560/75/90/120 products offer single-chip solutions at
60, 75, 90, and 120 seconds. Parts may also be cascaded together for longer durations.
EEPROM Storage
One of the benefits of Winbond’s ChipCorder
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.
Microcontroller Interface
In addition to its simplicity and ease of use, the ISD2500 series includes all the interfaces necessary
for microcontroller-driven applications. The address and control lines can be interfaced to a
microcontroller and manipulated to perform a variety of tasks, including message assembly, message
concatenation, predefined fixed message segmentation, and message management.
7.1. D
Part Number
* 3db roll-off point
ISD25120
ISD2560
ISD2575
ISD2590
ETAILED
D
ESCRIPTION
TABLE 1: ISD2560/75/90/120 PRODUCT SUMMARY
(Seconds)
Duration
120
60
75
90
®
technology is the use of on-chip nonvolatile memory,
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Input Sample
Rate (kHz)
8.0
6.4
5.3
4.0
ISD2560/75/90/120
Typical Filter Pass
Band * (kHz)
3.4
2.7
2.3
1.7