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ISD2532S Datasheet(PDF) 8 Page - Winbond |
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ISD2532S Datasheet(HTML) 8 Page - Winbond |
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8 / 42 page  ISD2532/40/48/64 PIN NO. PIN NAME SOIC/ PDIP TSOP FUNCTION ANA OUT 21 28 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. OVF 22 1 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. CE 23 2 Chip Enable: The CE input pin is taken LOW to enable all playback and record operations. The address pins and playback/record pin (P/ R ) are latched by the falling edge of CE . CE has additional functionality in the M6 (Push-Button) Operational Mode as described in the Operational Mode section. PD 24 3 Power Down: When neither record nor playback operation, the PD pin should be pulled HIGH to place the part in standby mode (see ISB specification). When overflow ( OVF ) pulses LOW for an 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. EOM 25 4 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 TEOM at the end of each message. In addition, the ISD2500 series has an internal VCC detect circuit to maintain message integrity should VCC fall below 3.5V. In this case, EOM goes LOW and the device is fixed in Playback-only mode. 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. - 8 - |
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