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ISD1000A View Datasheet(PDF) - Unspecified

Part NameDescriptionManufacturer
ISD1000A Single-Chip Voice Record/Playback Devices 16- and 20-Second Durations ETC
Unspecified 
ISD1000A Datasheet PDF : 20 Pages
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Product Data Sheets
ISD1000A Series
ISD1000A SERIES PINOUTS
M0/A0
M1/A1
M2/A2
M3/A3
M4/A4
M5/A5
NC
NC
A6
A7
AUX IN
VSSD
VSSA
SP+
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
DIP/SOIC
VCCD
P/R
XCLK
EOM
PD
CE
NC
ANA OUT
ANA IN
AGC
MIC REF
MIC
VCCA
SP–
to achieve longer recording durations. The non-
volatile storage array is based on production-
proven, low-power CMOS EEPROM technology.
The highly integrated ISD1000A Series contains
all the basic functions required for high-quality
voice Recording and Playback. The noise-cancel-
ling Microphone Preamplifier and Automatic Gain
Control (AGC) record both low-volume and high-
volume sounds. The AGC attack and release
times are adjusted by an external resistor and
capacitor. Antialiasing is performed by a continu-
ous fifth-order Chebyshev filter, requiring no exter-
nal components or clocks to give toll-quality
reproduction. The low corner of the passband is
user-settable by two external capacitors. The
devices contain their own temperature-stabilized
timebase oscillator.
The ISD1000A devices drive a speaker directly
through differential outputs. This boosts power by
four times and eliminates the need for a series
capacitor or an output amplifier. The device will
operate from a single power supply or from batter-
ies. The device also includes a power down func-
tion for applications where minimum power
consumption is critical. The CMOS-based design,
combined with the nonvolatile storage array,
assures the lowest possible overall power con-
sumption.
On-chip control functions make the ISD1000A
Series very easy to use in a wide array of applica-
tions. Each device offers a variety of operating
modes and interface options. The devices may be
used in applications that require little more than a
few switches and a battery. The devices may also
be integrated into electronic systems where digital
addresses can be provided for more sophisti-
cated message addressing and control. The
ISD1000A array is organized into 160 segments.
Addresses A0 through A7 provide access to each
segment in the array for message addressing.
Addressing provides the capability of construct-
ing messages by combining stored phrases and
sounds.
1
PIN DESCRIPTIONS
Voltage Inputs (VCCA, VCCD)
To minimize noise, the analog and digital circuits
in the ISD1000A Series devices use separate
power busses. These voltage busses are brought
out to separate pins and should be tied together
as close to the supply as possible. In addition,
these supplies should be decoupled as close to
the package as possible.
Ground Inputs (VSSA, VSSD)
The ISD1000A Series of devices utilizes separate
analog and digital ground busses. These pins
should be tied together as close to the package
as possible and connected through a low-imped-
ance path to power supply ground.
Power Down Input (PD)
When not recording or playing back, the PD pin
should be pulled HIGH to place the part in a very
low power mode (see ISB specification). When
EOM pulses LOW for an overflow condition, PD
should be brought HIGH to reset the address
pointer back to the beginning of the Record/Play-
back space.
1–3
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