isd1616b Winbond Electronics Corp America, isd1616b Datasheet - Page 7

• Manufacturer Part Number: isd1616b
• Description: Single-message Single-chip 6.6- To 40-second Voice Record & Playback Devices With Valert Option
• Manufacturer: Winbond Electronics Corp America

5. PIN DESCRIPTION
PIN NAME
PLAYE
PLAYL
MIC+
MIC-
V
REC
V
V
SP-
SSD
SSA
SSP
SOIC / PDIP
PIN NO.
1
2
3
4
5
6
7
8
9
Digital Ground: V
important to have a separate path for each ground back to
the system ground terminal to minimize noise.
Record: The device starts recording whenever
transits from High to Low and stays at Low. Recording stops
when the signal returns to High. This pin has an internal
pull-up
Edge-trigger Playback: A playback operation starts when
this input detects a low going signal exceeding the specified
debounced time. This pin has an internal pull-up
and an internal debounce on both falling & rising edge.
Level-trigger Playback: A playback operation begins when
this input detects a low going signal and remains at Low.
Playback stops when the signal returns to High. This pin has
an internal pull-up
falling edge.
Analog Ground: V
important to have a separate path for each ground back to
the system ground terminal to minimize noise.
Microphone Positive Input: The input transfers the signal
to the preamplifier. The internal Automatic Gain Control
(AGC) circuit controls the gain of the preamplifier. An
external microphone should be AC coupled to this pin via a
series capacitor. The capacitor value, together with an
internal 10 KΩ resistance on this pin, determines the low-
frequency cutoff for the ISD1600B passband.
Microphone Negative Input: This is the inverting input to
the microphone preamplifier. It provides input noise-
cancellation,
microphone is connected differentially to the device.
Speaker Negative : The SP-, Class D PWM output,
provides a differential output with SP+ pin to drive 8Ω
speaker or buzzer. During power down or recording, this pin
is tri-stated.
PWM Ground: V
It is important to have a separate path for each ground back
to the system ground terminal to minimize noise.
resistor
- 7 -
[1]
or
and an internal debounce on falling edge.
SSP
SSD
SSA
common-mode
resistor
is the ground for PWM speaker driver.
is the ground for digital circuits. It is
is the ground for analog circuits. It is
FUNCTIONS
[1]
Publication Release Date: Jan. 23, 2007
and an internal debounce on
ISD1600B SERIES
rejection,
when
resistor
Revision 1.2
REC
the
[1]