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LG1600FXH Datasheet(PDF) 7 Page - Agere Systems |
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LG1600FXH Datasheet(HTML) 7 Page - Agere Systems |
7 / 20 page Data Sheet August 1999 LG1600FXH Clock and Data Regenerator 7 Lucent Technologies Inc. Pin Information (continued) 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. 7VREF Reference Voltage. Nominally –3.2 V. Can be used to bias LG1605DXB (see data sheet). Load ≥10 kΩ. 9CEXT Terminal for optional external capacitor to increase PLL damping (normally not connected). 11 REXT 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 VDD through a 10 k Ω resistor. Normally grounded when not used. 26 V–CLKO Recovered Clock Out. ac couple or terminate into 50 Ω to GND. 31 V+CLKO Recovered Clock Out. ac couple or terminate into 50 Ω to GND. 35 VSS Supply Voltage. –5.2 Vdc nominal. Warning: Connecting a positive voltage to this pin will permanently damage the device. 38 V–OUT Regenerated Data Out. ac couple or terminate into 50 Ω to GND. 43 V+OUT Regenerated Data Out. ac couple or terminate into 50 Ω to GND. 48 V–FB dc Feedback Voltage. Connect to V–TH. 51 V–TH Input Threshold Voltage. Connect to V–FB. 55 V–IN Negative Data Input. Internally ac coupled. 60 V+IN Positive Data Input. Internally ac coupled. 65 V+FB 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. |
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