ISD2548PY Nuvoton Technology Corporation of America, ISD2548PY Datasheet - Page 9

• Manufacturer Part Number: ISD2548PY
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of ISD2548PY

• Lead Free Status / RoHS Status: Compliant

PIN NAME
XCLK
P/ R
SOIC/
PDIP
26
27
PIN NO.
TSOP
5
6
External Clock: The external clock input has an internal pull-down
device. The device is configured at the factory with an internal
sampling clock frequency centered to ±1 percent of specification.
The frequency is then maintained to a variation of ±2.25 percent
over the entire commercial temperature and operating voltage
ranges. 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
antialiasing 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 input
must be connected to ground.
Playback/Record: The P/ R input pin is latched by the falling edge
of the CE pin. A HIGH level selects a playback cycle while a LOW
level selects a record cycle. For a record cycle, the address pins
provide the starting address and recording continues until PD or
When a record cycle is terminated by pulling PD or CE HIGH,
then End-Of-Message ( EOM ) marker is stored at the current
address in memory. For a playback cycle, the address inputs
provide the starting address and the device will play until an EOM
marker is encountered. The device can continue to pass an EOM
marker if CE is held LOW in address mode, or in an Operational
Mode. (See Operational Modes section)
CE is pulled HIGH or an overflow is detected (i.e. the chip is full).
ISD2532
ISD2540
ISD2548
ISD2564
Part Number
- 9 -
Sample Rate
FUNCTION
8.0 kHz
6.4 kHz
5.3 kHz
4.0 kHz
Publication Release Date: April 24, 2006
ISD2532/40/48/64
Required Clock
819.2 kHz
682.7 kHz
1024 kHz
512 kHz
Revision 1.2