78P2241-IGT Просмотр технического описания (PDF) - TDK Corporation

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78P2241-IGT

E3/DS3/STS-1 Transceiver

TDK Corporation 

78P2241

E3/DS3/STS-1

Transceiver

PIN DESCRIPTION: The 28-pin PLCC is compatible with 78P7200 (continued)

NAME

GND

RFO

LF1

PIN

TQFP

1,3,4,7,8,12,14,

19,23,24,25,29,

30,31,32,36,41,

43,45,46,47,48

2

26

PIN

PLCC

2,4,6,8,22

TYPE DESCRIPTION

P Ground. Connecting all ground pins to a common ground

plane is recommended.

5

- A resistor to GND sets the operational speed of the chip.

RFO= 5.23K for DS3, RFO=6.81K for E3 and RFO=4.53K

for STS-1.

19

- Receiver PLL filter capacitor.

ENDEC

27

20

I

Encoder/Decoder: When set low, activates B3ZS/HDB3

ENDEC on receiver and transmitter logic signals.

Note 1: Pin type: I-input; I3-three level logic input; O-output; P-power supply. Advanced Data sheet pin

assignment and functions are subject to change.

5

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