OKI Semiconductor
ML2502
GENERAL DESCRIPTION
FEDL2502-03
Issue Date:
Aug. 9,
2004
Recording/Playback LSI with On-Chip 128-Kbit-Cell Analog Storage Flash Memory
The ML2502 is a single-chip recording/playback LSI featuring an innovative Analog Multi-Level Storage
technology that enables you to store non-compressed analog signals directly into the on-chip 128-Kbit-cell Flash
memory.
The ML2502 can be a perfect fit for such applications as Voice-memos, Message Cards, toys and other consumer
applications because of such features as low operating voltages (2.7 to 3.3 V), no backup requirement, and
simplified operations eliminating an external MCU.
FEATURES
•Built-in
128-Kbit-cell Analog Storage Flash Memory
Programming/Erasing Cycles:10,000 cycles
Data Retention Period: 10 years
•Recording/Playback
Controls by Switch Input
•Number
of Phrases to be recorded or played: 1 phrase or 2 phrases
•Recording/Playing
Time (At f
SAM
= 6.4 kHz)
In Dual-Phrase Recording/Playback Mode: Approx. 10 sec max. for each phrase
(Entire memory divided into 2 phrases)
In Single-Phrase Recording/Playback Mode: Approx. 20 sec max. (Using the entire memory space by
connecting REC1 to REC2 and PLAY1 to PLAY2)
•Sampling
Frequency
Selectable; 4.0 kHz, 5.3 kHz or 6.4 kHz
•Built-in
Microphone Amplifier with AGC (Automatic Gain Control)
•Built-in
LPF
•Built-in
Speaker Driver
Supports both a dynamic speaker and a piezo speaker through adjusting the voltage amplitude
externally.
•No
Oscillator Required (built-in oscillation circuit)
•Power
Supply Voltage: 2.7 to 3.3 V
•Operating
Temperature:–10 to +70ºC
•Package:
30-pin plastic SSOP (SSOP30-P-56-0.65-K) (Product name: ML2502MB)
Die Form (Product name: ML2502WA)
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