GS9025A_05 Datasheet, PDF (6/18 Pages) Gennum Corporation – Serial Digital Receiver

PIN DESCRIPTIONS (Continued)
NUMBER
SYMBOL TYPE
DESCRIPTION
28, 29
SCO/SCO
O Serial clock output. SCO/SCO are differential current mode outputs and require
external 75Ω pull-up resistors.
31, 32
SDO/SDO
O Equalized and reclocked serial digital data outputs. SDO/SDO are differential current
mode outputs and require external 75Ω pull-up resistors.
36
CLK_EN
I
Clock enable. When HIGH, the serial clock outputs are enabled.
38
C_OSC
I
Timing control capacitor for internal system clock.
39
LOCK
O Lock indication. When HIGH, the GS9025A is locked. LOCK is an open collector output
and requires an external 10kΩ pull-up resistor.
40
SSI/CD
O Signal strength indicator/Carrier detect.
41
A/D
I
Analog/Digital select.
42
SMPTE
I
SMPTE/Other data rate select. TTL/CMOS compatible input.
43
OEM_TEST
O Output ‘Eye’ monitor test. Single-ended current mode output that requires an external
50Ω pull-up resistor. This feature is recommended for debugging purposes only. If
enabled during normal operation, the maximum operating temperature is rated to
60°C. For maximum cable length performance OEM_TEST must be disabled.
GENNUM CORPORATION
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