GENERAL DESCRIPTION

The W51300 is a voice recorder IC which contains A/D and D/A converters to digitize and reproduce voice signals. An anti-alias/smoothing filter, AGC circuit, MIC preamplifier, and speaker power amplifier are used to smooth the input voice and set the output voice to a certain volume while minimizing the number of extra components needed. The recording time depends on the size of the external memory.

FEATURES

• Modified ADM algorithm with 24 KHz sampling frequency when ROSC = 620 KW

• Operates with Winbond serial flash EPROM

• Built-in A/D, D/A, MIC preamplifier, AGC circuit, anti-alias/smoothing filter, speaker power amplifier, and LED indicator

• 8 input trigger pins (L_REC, E_PLAY, L_PLAY, FWD, BWD, STOP, ERASE, RESET) debounced to ensure noise-free operations

• Single/multi-voice segment operation, normal/CPU mode selected by pin option (SMODE, CPU)

• Cascadable for longer duration by directly cascading serial flash EPROMs (maximum 16 Mbits)

• Maximum 63 voice segments available in multi-segment operation

• Provides selective record, erase, and playback functions

• Provides low power detection circuit at 3.0V

• Provides both speaker direct drive and speaker current output (5 mA)

• Low power consumption:

- Operating: 15 mA (typ.)

- Standby: 0.01 mA (typ.)