ISD2500 ETC1 [List of Unclassifed Manufacturers], ISD2500 Datasheet - Page 3

• Manufacturer Part Number: ISD2500
• Description: Single-Chip Voice Record/Playback Devices 32-, 40-, 48-, 64-,60-,75,90-, and 120-Second Durations
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

Product Data Sheets
EEPROM Storage
One of the benefits of ISD’s ChipCorder technol-
ogy is the use of on-chip nonvolatile memory,
providing zero-power message storage. The mes-
sage is retained for up to 100 years typically
without power. In addition, the device can be re-
recorded typically over 100,000 times.
Microcontroller Interface
In addition to its simplicity and ease of use, the
ISD2500 Series includes all the interfaces neces-
sary for microcontroller-driven applications. The
address and control lines can be interfaced to a
microcontroller and manipulated to perform a vari-
ety of tasks, including message assembly,
message concatenation, predefined fixed mes-
sage segmentation, and message management.
Programming
The ISD2500 Series is also ideal for playback-only
applications, where single or multiple messages
are referenced through buttons, switches, or a
microcontroller. Once the desired message config-
uration is created, duplicates can easily be
generated via an ISD programmer.
ISD2532/40/48/64 * DEVICE BLOCK DIAGRAM
ANA OUT
MIC REF
ANA IN
XCLK
AGC
MIC
V
CCA
Power Conditioning
Amp
Pre-
V
SSA
Amp
V
SSD
Gain Control
Automatic
Internal Clock
(AGC)
V
CCD
Antialiasing Filter
A0
5-Pole Active
A1
A2 A3 A4 A5
Address Buffers
Timing
Analog Transceivers
Multilevel Storage
Sampling Clock
Nonvolatile
256 K Cell
A6
Array
PIN DESCRIPTIONS
Voltage Inputs (V
To minimize noise, the analog and digital circuits in
the ISD2500 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 sup-
plies should be decoupled as close to the package
as possible.
Ground Inputs (V
The ISD2500 Series of devices utilizes separate
analog and digital ground busses. These pins
should be connected separately through a low-
impedance 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 I
OVF 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
functionality in the M6 (Push-Button) Operational
*
A7
Advance information: ISD2532/40/48/64 devices.
A8
space.
PD
Smoothing Filter
OVF P/R
Device Control
5-Pole Active
The
SSA
CCA
, V
, V
PD
SSD
CE EOM
CCD
SB
)
)
Mux
pin
specification). When
AUX IN
Amp
has
R
ISD2500 Series
additional
1–81
SP+
SP–
1