ISD1964SYI Datasheet, PDF (3/29 Pages) List of Unclassifed Manufacturers – SINGLE-CHIP, MULTIPLE-MESSAGE VOICE RECORD/PLAYBACK DEVICE

ISD1900
1. GENERAL DESCRIPTION
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Nuvoton’s ISD1900 ChipCorder^® Series is a single-chip multiple-message record/playback device with dual
operating modes and wide operating voltage ranging from 2.4V to 5.5V. The sampling frequency can be
selected from 4 to 12 kHz via an external resistor, which also determines the duration. The device is designed
for mostly standalone applications, and of course, it can be manipulated by a microcontroller, if necessary.
The two operating modes are Address Mode and Direct Mode. While in Address Mode, both record and
playback operations are manipulated according to the start address and end address specified through the start
address and end address pins. In Direct Mode, the device can configure the memory up to as many as eight
similar duration messages, pending upon the fixed message configuration settings. With the record or
playback feature being pre-selected, each message can be randomly accessed via its message control pin.
The device has a selectable differential microphone input with AGC feature or single-ended analog input, AnaIn,
under feed-through mode. The audio output is either a differential Class-D PWM direct-drive or a single-ended
voltage output (AUX out), depending on the derivative selected.
2. FEATURES
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The ISD1900 is a multiple messages record/playback device with two operational modes: Address Mode and
Direct Mode.
• Supply voltage: 2.4V to 5.5V.
• External resistor, Rosc, selects sampling frequency and duration.
Sampling Frequency
Rosc
ISD1916
ISD1932
ISD1964
12 kHz
53.3 KΩ
10.6 sec
21.3 sec
42.6 sec
8 kHz
80 KΩ
16 sec
32 sec
64 sec
6.4 kHz
100 KΩ
20 sec
40 sec
80 sec
5.3 kHz
120 KΩ
24 sec
48 sec
96 sec
4 kHz
160 KΩ
32 sec
64 sec
128 sec
• Mic+/Mic-: differential microphone inputs.
• AGC: automatic gain control for microphone preamp circuit.
• F¯¯T: feed-through the AnaIn signal to the speaker outputs while AnaIn is converted from MIC+.
• When both F¯¯T and recording are active, device will record AnaIn signal into memory with AnaIn signal output
to speaker simultaneously.
• SP+/SP-: Class-D PWM differential speaker drivers or single-ended voltage output, depending on the
derivative selected.
• ¯L¯E¯D¯: LED is on during recording.
• Automatically power down after each operation cycle.
• Playback takes precedence over the recording operation.
y Temperature option: -40°C to +85°C (Industrial)
y Packaging: available in SOIC only
2.1. ADDRESS MODE
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Publication Release Date: Jan 5, 2009
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Revision 0.51