ISD1112SR Nuvoton Technology Corporation of America, ISD1112SR Datasheet - Page 8

• Manufacturer Part Number: ISD1112SR
• Description: IC VOICE REC/PLAY 12-SEC 28-SOIC
• Manufacturer: Nuvoton Technology Corporation of America
• Series: ISD1100r

Specifications of ISD1112SR

• Interface: Pushbutton
• Filter Pass Band: 2.2kHz
• Duration: 12 Sec
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PIN NAME
RECLED
XCLK
PIN NO.
25
26
Record LED: The RECLED output is LOW during a record
cycle. It can be used to drive an LED to indicate a record cycle
is
momentarily when an end-of-message is encountered in a
playback operation.
External Clock: The external clock input has an internal pull-
down resistor. The ISD1100 is configured at the factory with
an internal sampling clock frequency that guarantees its
minimum nominal record/playback time. For instance, an
ISD1110 operating within specification will be observed to
always have a minimum of 10 seconds of recording time. The
sampling frequency is then maintained to a variation of ±2.25
percent over the commercial temperature and operating
voltage ranges while still maintaining the minimum duration
specified. As a result some devices will have a few percent
more than nominal recording time. If greater precision is
required, the device can be clocked through the XCLK pin as
follows:
These recommended clock rates should not be varied
because the anti-aliasing and smoothing filters are fixed, and
aliasing problems can occur if the sample rate differs from the
one recommended. The duty cycle on the input clock is not
critical, as the clock is immediately divided by two. If the
XCLK is not used, this pin must be grounded. Please see
Application Information for the ISD1100 series for more details
on external clocking.
in
ISD1110
ISD1112
progress.
Part Number
- 8 -
EXTERNAL CLOCK SAMPLE RATES
In
addition,
Sample Rate
FUNCTION
6.4 kHz
5.3 kHz
ISD1100 SERIES
RECLED
Required Clock
819.2 kHz
682.7 kHz
pulses
LOW