S2042/S2048
HIGH PERFORMANCE SERIAL INTERFACE CIRCUITS
Table 5. S2042 Pin Assignment and Descriptions (Continued)
Pin Name
OE0
OE1
Level
Static
TTL
TTL
I/O
I
I
Pin #
2
1
Description
Active Low Output-Enable control for TX/TY outputs. When
inactive, TX/TY are disabled and remain in the logic Low state.
Active Low Output-Enable control for TLX/TLY outputs. When
inactive, TLX/TLY are disabled and remain in the logic Low
state.
Reference Select. Selects the reference clock frequency. See
Table 1.
Rate Select. Multilevel input used to select the operating speed
of the transmitter. See Table 1.
Core +3.3 V
TTL Ground
TTL/LVTTL Power Supply
PECL I/O Power Supply
PECL I/O Ground
Analog Power Supply
Analog Ground
Core Ground
REFSEL
RATESEL
ECLVCC
TTLGND
TTLVCC
ECLIOVCC
ECLIOVEE
AVCC
AVEE
ECLVEE
Static
TTL
TT L
+3.3 V
GND
+3.3 V/
+5 V
+3.3 V
GND
+3.3 V
GND
GND
I
I
–
–
–
–
–
–
–
–
18
15
21, 39,
45
14
17
3, 10
6, 7
27, 32
26, 33
13, 34,
40, 46,
51, 52
8
April 10, 2000 / Revision B
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
