Datasheet

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1.3 Related Documentation from Texas Instruments
1.4 Additional Documentation
Introduction
Manual reset circuits are provided for both the PCM4202 (U1) and the AES3 transmitters (U12 and
U13). The ADC RESET switch (SW2) is utilized for resetting the A/D converter, while the DIT
RESET switch (SW4) is utilized for resetting the AES3 transmitters.
The system or master clock for the evaluation module may be generated onboard or by an external
clock source. Oscillators X1 and X2 operate at fixed clock frequencies of 22.5792MHz and
24.576MHz, respectively. The oscillators provide low jitter clock sources for measuring the
performance of the PCM4202 in Master mode operation. Alternatively, an external clock source
may be connected at J7 for Master mode operation, supporting alternate system clock and
sampling frequencies. For Slave mode operation, the system clock is provided from an external
source through header J4 and buffer U9. Switch SW5 provides clock configuration control for the
oscillators and the external clock input at connector J7.
The following documents provide information regarding Texas Instrument integrated circuits used in
the assembly of the PCM4202EVM. The latest revisions of these documents are available from the
TI web site at http://www.ti.com.
Data Sheet Literature Number
PCM4202 Datasheet SBAS290
DIT4192 Datasheet SBOS229
OPA227 Datasheet SBOS110
OPA1632 Datasheet SBOS286
REG1117 Datasheet SBVS001
SN74AHC08 Datasheet SCLS236
SN74AHC14 Datasheet SCLS238
SN74ALVC245 Datasheet SCES271
SN74LVC1G125 Datasheet SCES223
The following documents or references provide information regarding selected non-TI components
used in the assembly of the PCM4202EVM. These documents are available from the corresponding
manufacturer.
Document/Reference Manufacturer
SM7745H Series CMOS Oscillators Pletronics ( http://www.pletronics.com )
6 SBAU103–August 2004PCM4202EVM User's Guide