FEDL2500BFULL-02
Issue Date: Aug.9, 2004
OKI Semiconductor
ML2500BTA
Analog-Storage Single-chip Record/Playback LSI with 1M Bit-Cell Flash Memory
GENERAL DESCRIPTION
Thanks to newly developed Analog Multi-Level Storage technology, ML2500B stores non-compressed analog
source signal directly into on-chip 1M Bit-Cell Flash memory. The result is superb sound quality without noise
and distortions introduced through coding/decoding, and impressive long-time record/playback capability up to
256 sec. ML2500B is fully controllable by an external MCU via the industry’s standard Serial Peripheral
Interface.
In addition, no backup requirement and low operating voltage (2.7 to 3.3 V) make the LSI an ideal choice for
compact, handy and portable terminals. ML2500B is a true single-chip solution to record/playback subsystem for
use with today’s size-critical electronic products.
DIFFERENCES BETWEEN THE ML2500BTA AND THE ML2500TA
ML2500BTA
ML2500TA
Operating Temperature
Pin Symbol
Ta = –40 to +70°C
Pin 10: TEST2
Ta = –10 to +70°C
Pin 10: NC
AC Characteristic
DI hold time tDIH = 30 ns
DI hold time tDIH = 20 ns
FEATURES
•On-chip non-volatile 1M bit-cell Flash memory
Program/Erase Cycles: 10,000 cycles
Data Retention 10 years
•MCU Interface
Serial Peripheral Interface (SPI; Mode 0)
:
•Record/Playback Time Length (With the int. Osc. or ext. clock at 8.192 MHz)
Approx. 160 sec (At fsam = 6.4 kHz)
Approx. 190 sec (At fsam = 5.3 kHz)
Approx. 256 sec (At fsam = 4.0 kHz)
•Selectable Sampling Frequencies
4.0 kHz, 5.3 kHz, 6.4 kHz
•Maximum number of recording phrases: 320 phrases
•Phrase Control
Fully controllable with user-definable Start, Stop addresses
•Built-in LPF/Smoothing Filter (LPF attenuation –40 dB/oct)
•Built-in Oscillation Circuit (8.192 MHz), No oscillator required
Optional external clock input (Clock Frequency 4.0 to 8.192 MHz)
•Power Supply
:
2.7 to 3.3 V
•Operating Temperature:
–40 to +70°C (guaranteed for both function and voice quality)
–40 to +85°C (guaranteed for function only) *Notice
*Notice
The voice quality can deteriorate at temperatures beyond the range of –40 to +70°C.
DC and AC characteristics in this data sheet are specified for –40 to +70°C operating temperature range.
•Package:
32-pin Plastic TSOP (TSOP(1)32-P-814-0.50-1K) (Product name: ML2500BTA)
Note: Please contact the Oki Sales office/Distributors for bare chips.
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