A new single-chip solution for storage and playback of short audio sequences is now available from Gothic Components

The OKI ML2502 employs multi-level, analogue signal storage techniques to read/write up to 20 seconds of uncompressed audio from the on-chip 128Kbit-cell flash memory. The device is available in a 30-pin plastic SSOP package and in die form. The ML2502 LSI requires no back-up or external MCU, targeting applications such as voice messaging, message cards or interactive toys.

This article was originally published on Electronicstalk on 14 February 2001 at 8.00am (UK)
Related stories

MELF resistors offer greater choice
Gothic Components is now offering the complete range of MELF resistor products from BC Components, comprising MELF, Mini-MELF and Micro-MELF

Programmable devices programmed to order
Gothic Components has invested over GBP 100,000 in a programming centre at its Wokingham facility, to service customer requirements for ready-configured programmable components

Built-in features include a microphone amplifier with AGC and a speaker driver to support an external dynamic or piezoelectric speaker via an external R-C network.

Supply voltage range is 2.7 to 3.3V and operating temperature is -10 to +70C.

In single-phrase mode the ML2502 uses the entire on-chip flash memory for a single message.

Dual-phrase mode partitions the memory to store two shorter messages.

At 6.4kHz sample rate, dual-phrase mode supports two messages up to 10 seconds each.

Single phrase mode allows up to 20 seconds record/playback.

A development board for the ML2502 is also available, providing a convenient and rapid design route into commercial products.

The demo board allows all features of the ML2502 device to be exercised, with a micro switch array to select dual/single phrase mode and sample frequency.

Inputs for phrase-1 and phrase-2 record and playback signals, manual speaker gain control and led monitor are provided.

The development board also includes a microphone and speaker, enabling new designs based on the ML2502 to be readily evaluated.

The ML2502 is part of a family of speech parts that includes other voice recorders and playback devices.