Datasheet

DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
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3. PIN DESCRIPTION
Table 3-1. Pin Description Sorted by Pin Number
PIN NAME TYPE FUNCTION
1 RCHBLK O Receive Channel Block
2 JTMS I IEEE 1149.1 Test Mode Select
3 8MCLK O 8.192 MHz Clock
4 JTCLK I IEEE 1149.1 Test Clock Signal
5
JTRST
I IEEE 1149.1 Test Reset, Active Low
6 RCL O Receive Carrier Loss
7 JTDI I IEEE 1149.1 Test Data Input
8, 9, 15,
23, 26, 27,
28
N.C. — No Connect. Do not connect any signal to this pin.
10 JTDO O IEEE 1149.1 Test Data Output
11 BTS I Bus Type Select
12 LIUC I Line Interface Connect
13 8XCLK O Eight Times Clock
14 TEST I Test
16 RTIP I Receive Analog Tip Input
17 RRING I Receive Analog Ring Input
18 RVDD – Receive Analog Positive Supply
19, 20, 24 RVSS – Receive Analog Signal Ground
21 MCLK I Master Clock Input
22 XTALD O Quartz Crystal Driver
25
INT
O Interrupt, Active Low
29 TTIP O Transmit Analog Tip Output
30 TVSS – Transmit Analog Signal Ground
31 TVDD – Transmit Analog Positive Supply
32 TRING O Transmit Analog Ring Output
33 TCHBLK O Transmit Channel Block
34 TLCLK O Transmit Link Clock
35 TLINK I Transmit Link Data
36 CI I Carry In
37 TSYNC I/O Transmit Sync
38 TPOSI I Transmit Positive Data Input
39 TNEGI I Transmit Negative Data Input
40 TCLKI I Transmit Clock Input
41 TCLKO O Transmit Clock Output
42 TNEGO O Transmit Negative Data Output
43 TPOSO O Transmit Positive Data Output
44, 61,
81,83
DVDD — Digital Positive Supply
45, 60, 80,
84
DVSS — Digital Signal Ground
46 TCLK I Transmit Clock
47 TSER I Transmit Serial Data
48 TSIG I Transmit Signaling Input