isd2548x Winbond Electronics Corp America, isd2548x Datasheet - Page 8

• Manufacturer Part Number: isd2548x
• Description: Single-chip, Multiple-messages, Voice Record/playback Device 32-, 40-, 48-, And 64-second Duration
• Manufacturer: Winbond Electronics Corp America

PIN NAME
ANA OUT
EOM
OVF
CE
PD
SOIC/
PDIP
21
22
23
24
25
PIN NO.
TSOP
28
1
2
3
4
Analog Output: This pin provides the preamplifier output to the
user. The voltage gain of the preamplifier is determined by the
voltage level at the AGC pin.
Overflow: This signal pulses LOW at the end of memory array,
indicating the device has been filled and the message has
overflowed. The OVF output then follows the CE input until a
PD pulse has reset the device. This pin can be used to cascade
several ISD2500 devices together to increase record/playback
durations.
Chip Enable: The CE input pin is taken LOW to enable all
playback
playback/record pin (P/ R ) are latched by the falling edge of CE .
Operational Mode as described in the Operational Mode section.
Power Down: When neither record nor playback operation, the PD
pin should be pulled HIGH to place the part in standby mode (see
I
overflow condition, PD should be brought HIGH to reset the
address pointer back to the beginning of the memory array. The PD
pin has additional functionality in the M6 (Push-Button) Operation
Mode as described in the Operational Mode section.
End-Of-Message: A nonvolatile marker is automatically inserted at
the end of each recorded message. It remains there until the
message is recorded over. The EOM output pulses LOW for a
period of T
In addition, the ISD2500 series has an internal V
maintain message integrity should V
When the device is configured in Operational Mode M6 (Push-
Button Mode), this pin provides an active-HIGH signal, indicating
the device is currently recording or playing. This signal can
conveniently drive an LED for visual indicator of a record or
playback operation in process.
EOM goes LOW and the device is fixed in Playback-only mode.
CE
SB
specification). When overflow ( OVF ) pulses LOW for an
has
EOM
and
additional
at the end of each message.
- 8 -
record
functionality
operations.
FUNCTION
CC
ISD2532/40/48/64
in
fall below 3.5V. In this case,
The
the
address
M6
CC
detect circuit to
(Push-Button)
pins
and