Data Sheet

August 1999

LG1600FXH Clock and Data Regenerator

7

Lucent Technologies Inc.

The pin descriptions for the LG1600FXH are given in Table 1.

Table 1. Pin Descriptions

Pin

Symbol

Name/Description

1, 4, 17

DNC

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).

11

Terminal for external resistor to set PLL bandwidth (Required).

14

LOS

Loss of Signal Indicator. Provides approximately 1 mA sink current with

data signal present, can interface to CMOS, TTL when connected to logic

Ω resistor. Normally grounded when not used.

26

Recovered Clock Out. ac couple or terminate into 50

Ω to GND.

31

Recovered Clock Out. ac couple or terminate into 50

Ω to GND.

35

Supply Voltage. –5.2 Vdc nominal.

Warning: Connecting a positive voltage to this pin will permanently

damage the device.

38

Regenerated Data Out. ac couple or terminate into 50

Ω to GND.

43

Regenerated Data Out. ac couple or terminate into 50

Ω to GND.

48

51

55

Negative Data Input. Internally ac coupled.

60

Positive Data Input. Internally ac coupled.

65

dc Feedback Voltage. Internally connected; not normally used.

18, 68

NIC

No Internal Connection. May be grounded.

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

GND

Ground. Connect to top ground plane of coplanar/microstrip circuit board.

Body

GND

Ground. Does not need to be connected. GND pins provide all necessary

ground connections.