Rainbow Electronics ISD18B12 - Manual (Page 3)

ISD18B12
Publication Release Date: August 31, 2007
- 3 - Revision A1
1. GENERAL DESCRIPTION
Winbond’s ISD18B12 ChipCorder ® is a new single-chip single-message record/playback device with a
special TryMe feature. The user-selectable duration is from 6 to 12 seconds, with wide operating
voltage ranging from 2.4V to 5.5V. Its sampling frequency, ranging from 4kHz to 8kHz, is externally
controlled via resistor at Rosc pin. This device also includes microphone amplifier, anti-aliasing filter,
multilevel storage array, smoothing filter and speaker amplifier. Two external resistors are used to
adjust the microphone amplifier gain for the incoming signal. Thus, a minimum record/playback
subsystem can be configured with a microphone, a speaker, several passive components, two push
buttons, and a power source.
Recordings are stored into on-chip non-volatile memory, providing zero-power message storage. This
unique, single-chip solution is made possible through Winbond’s patented Multi-Level Storage
technology. Voice and audio signals are stored directly into memory in their natural form, providing
high-quality, solid-state voice reproduction. The device is automatically power down after each
operation cycle with typical standby current, 1µA. With the embedded Flash memory employed, data
retention up to 100 years and typical 100,000 erase/record cycles can be reached.
2. FEATURES
• Supply voltage: 2.4V to 5.5V
• User-selected variable sampling frequency and duration via external resistor
Sampling Frequency 8 kHz 6.4 kHz 5.3 kHz 4 kHz
Rosc 80 KΩ 100 KΩ 120 KΩ 160 KΩ
Duration 6 secs 7.5 secs 9 secs 12 secs
•
RECL : Level recording
•
RECE : Edge-trigger, toggle on-off
•
PLAYE : Edge-trigger, toggle on-off
•
PLAYL : Level playback or looping playback
•
LEDR : LED output for recording
•
LEDP : LED output for playback
•
FT : Feed-through microphone input to speaker outputs
• Microphone amplifier gain: user control via two external resistors
• With feed-through enabled, r
ecord microphone signal into memory while feed-through path
remains active
• Playback takes precedence over the Recording operation
•
TryMe : TryMe special mode
• Package option: die only
• Temperature options: 0°C to +50°C