ADVANCED
Confidential
Publication Release Date: March 28, 2005
Revision
A0
ISD1700A
Series
Multi-Message
Single-Chip
Voice Record & Playback Devices
ISD1700A SERIES
- 2 -
TABLE OF CONTENTS
1
GENERAL DESCRIPTION..............................................................................................................4
2
FEATURES......................................................................................................................................5
3
BLOCK DIAGRAM...........................................................................................................................6
4
PINOUT CONFIGURATION............................................................................................................7
5
PIN DESCRIPTION .........................................................................................................................8
6
FUNCTIONAL DESCRIPTION ......................................................................................................11
6.1
Detailed Description...............................................................................................................11
6.1.1
Audio Quality ...............................................................................................................11
6.1.2
Message Duration........................................................................................................11
6.1.3
Flash Storage ..............................................................................................................11
6.2
Memory Array Architecture ....................................................................................................11
6.3
Modes of Operations..............................................................................................................12
7
PUSH-BUTTON OPERATIONS ....................................................................................................13
7.1
Operation Overview ...............................................................................................................13
7.1.1
Record Operation ........................................................................................................13
7.1.2
Playback Operation .....................................................................................................14
7.1.3
Forward Operation.......................................................................................................14
7.1.4
Erase Operation...........................................................................................................15
7.1.5
Reset Operation...........................................................................................................16
7.1.6
VOL Operation.............................................................................................................17
7.1.7
FT (Feed-Through) Operation .....................................................................................17
7.2
vAlert Feature (Optional)........................................................................................................17
7.3
Sound Effect (SE) Editing ......................................................................................................17
7.3.1
Sound Effects ..............................................................................................................17
7.3.2
Entering SE Mode........................................................................................................18
7.3.3
SE Editing ....................................................................................................................18
7.3.4
Exiting SE Mode ..........................................................................................................18
7.3.5
Sound Effect Duration..................................................................................................18
7.4
Analog Inputs .........................................................................................................................19
7.4.1
Microphone Input .........................................................................................................19
7.4.2
AnaIn Input...................................................................................................................19
8
TIMING DIAGRAMS ......................................................................................................................20
8.1
Record, play and erase..........................................................................................................20
9
ABSOLUTE MAXIMUM RATINGS ................................................................................................23
ISD1700A SERIES
Confidential
Publication Release Date: March 28, 2005
- 3 -
Revision A0
9.1
Operating Conditions .............................................................................................................23
10
ELECTRICAL CHARACTERISTICS .............................................................................................24
10.1
DC Parameters ......................................................................................................................24
10.2
AC Parameters.......................................................................................................................25
11
TYPICAL APPLICATION CIRCUITS.............................................................................................26
11.1
Good Audio Design Practices................................................................................................27
12
DIE PHYSICAL LAYOUT...............................................................................................................28
12.1
ISD1740A/50A/60A................................................................................................................28
13
ORDERING INFORMATION .........................................................................................................29
14
VERSION HISTORY......................................................................................................................30
ISD1700A SERIES
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1 GENERAL
DESCRIPTION
The Winbond
ISD1700A ChipCorder
Series is a high quality, fully integrated, single-chip multi-
message voice record and playback device ideally suited to a variety of electronic systems. The
message duration is user selectable in ranges from 26 seconds to 120 seconds, depending on the
specific device. The sampling frequency of each device can also be adjusted from 4 kHz to 12 kHz
with an external resistor, giving the user greater flexibility in duration versus recording quality for each
application. Operating voltage spans a range from 2.4 V to 5.5 V to ensure that the ISD1740A/50A/60A
devices are optimized for a wide range of battery or line-powered applications.
The ISD1740A/50A/60A devices incorporate a proprietary message management system that allows
the chip to self-manage address locations for multiple messages. This unique feature provides
sophisticated messaging flexibility in a simple push-button environment. The devices include an on-
chip oscillator (with external resistor control), microphone preamplifier with Automatic Gain Control
(AGC), an auxiliary analog input, anti-aliasing filter, Multi-Level Storage (MLS) array, smoothing filter,
volume control, Pulse Width Modulation (PWM) Class D speaker driver, and current output.
The ISD1740A/50A/60A devices also support an optional "vAlert" (voiceAlert) feature that can be used
as a new message indicator. With vAlert, the IC strobes an external LED to indicate that a new
message is present. Four special sound effect locations are reserved for audio confirmation of
commands, such as "Start Record", "Stop Record," and "Erase."
Recordings are stored in on-chip Flash memory cells, providing zero-power message storage. This
unique single-chip solution is made possible through Winbond's patented Multi-Level Storage (MLS)
technology. Audio data are stored directly in solid-state memory without digital compression, providing
superior quality voice and music reproduction.
Voice signals can be fed into the chip through two independent paths: a differential microphone input
and a single-ended analog input. For outputs, the ISD1740A/50A/60A devices simultaneously provide
a Pulse Width Modulation (PWM) Class D speaker driver and a separate current output. The PWM can
directly drive a standard 8
speaker or a typical buzzer, while the separate single-ended current
output can drive an external amplifier.
The ISD1740A/50A/60A devices automatically enter into power down mode for power conservation
when an operation is completed.
Notice: The specifications are subject to change without notice. Please contact Winbond Sales Offices
or Representatives to verify current or future specifications.
ISD1700A SERIES
Confidential
Publication Release Date: March 28, 2005
- 5 -
Revision A0
2 FEATURES
Integrated message management systems for single-chip, push-button applications
o
REC
: level-trigger for recording
o
PLAY
: edge-trigger for individual message or level-trigger for sequential playback
o
ERASE
: edge-triggered erase for first or last message or level-triggered erase for all messages
o
FWD
: edge-trigger to advance to the next message or fast message scan during the playback
o
VOL
: 8 levels output volume control
o RDY: ready or busy status indication
o
RESET
: bring back to the default state
o Automatic power-down after each operation cycle
Selectable sampling frequency controlled by an external oscillator resistor
Sampling Frequency
12 kHz
8 kHz
6.4 kHz
5.3 kHz
4 kHz
Rosc
60 k
80
k
100
k
120
k
160
k
Selectable message duration
Device ISD1740A
ISD1750A
ISD1760A
Duration
26 ~ 80 sec
33 ~ 100 sec
40 ~ 120 sec
Message and operation indicators
o Four customizable Sound Effects (SE) for audible indications
o Optional vAlert (voiceAlert) to indicate the presence of new messages
o LED: stay on during recording, blink during playback, forward and erase operations
Two individual input channels
o MIC+/MIC-: differential microphone inputs with AGC (Automatic Gain Control)
o AnaIn: single-ended auxiliary analog input for recording or feed-through
Dual output channels
o PWM Class D speaker amplifier to directly drive an 8 speaker or a typical buzzer
o AUD single-ended current output to drive external power amplifier
ChipCorder standard features
o High-quality, natural voice and audio reproduction
o 2.4V to 5.5V operating voltage
o 100-year message retention (typical)
o 10,000 record cycles (typical)
Commercial Temperature grade: 0
C to +50C for die only
Package options: available in die only
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