LG1600FXH Datasheet, PDF (7/20 Pages) Agere Systems – LG1600FXH Clock and Data Regenerator

Data Sheet
August 1999
LG1600FXH Clock and Data Regenerator
Pin Information (continued)
The pin descriptions for the LG1600FXH are given in Table 1.
Table 1. Pin Descriptions
Pin
1, 4, 17
7
9
11
14
26
31
35
38
43
48
51
55
60
65
18, 68
2, 3, 5, 6,
8, 10, 12,
13, 15, 16,
19, 20, 21,
22, 23, 24,
25, 27, 28,
29, 30, 32,
33, 34, 36,
37, 39, 40,
41, 42, 44,
45, 46, 47,
49, 50, 52,
53, 54, 56,
57, 58, 59,
61, 62, 63,
64, 66, 67
Body
Symbol
DNC
VREF
CEXT
REXT
LOS
V–CLKO
V+CLKO
VSS
V–OUT
V+OUT
V–FB
V–TH
V–IN
V+IN
V+FB
NIC
GND
Name/Description
Do Not Connect. Internal test point or reserved for future use.
Reference Voltage. Nominally –3.2 V. Can be used to bias LG1605DXB
(see data sheet). Load ≥10 kΩ.
Terminal for optional external capacitor to increase PLL damping (normally
not connected).
Terminal for external resistor to set PLL bandwidth (Required).
Loss of Signal Indicator. Provides approximately 1 mA sink current with
data signal present, can interface to CMOS, TTL when connected to logic
VDD through a 10 kΩ resistor. Normally grounded when not used.
Recovered Clock Out. ac couple or terminate into 50 Ω to GND.
Recovered Clock Out. ac couple or terminate into 50 Ω to GND.
Supply Voltage. –5.2 Vdc nominal.
Warning: Connecting a positive voltage to this pin will permanently
damage the device.
Regenerated Data Out. ac couple or terminate into 50 Ω to GND.
Regenerated Data Out. ac couple or terminate into 50 Ω to GND.
dc Feedback Voltage. Connect to V–TH.
Input Threshold Voltage. Connect to V–FB.
Negative Data Input. Internally ac coupled.
Positive Data Input. Internally ac coupled.
dc Feedback Voltage. Internally connected; not normally used.
No Internal Connection. May be grounded.
Ground. Connect to top ground plane of coplanar/microstrip circuit board.
GND
Ground. Does not need to be connected. GND pins provide all necessary
ground connections.
Lucent Technologies Inc.
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