Preliminary Data Sheet
October 2000
T7630 Dual T1/E1 5.0 V Short-Haul Terminator (Terminator II)
20
L Lucent Technologies Inc.
Pin Information
(continued)
Table 1. Pin Descriptions-Channel 1 and Channel 2
(continued)
* I
u
indicates an internal pull-up.
After RESET is deasserted, the channel is in the default framing mode, as a function of the DS1/CEPT pin.
Asserting this pin low will initially force RDY to a low state.
Pin
Symbol
Type
*
Description
CH1 CH2
11
27
RTIP_RPD
I
Receive Bipolar Tip.
Positive bipolar input data from the receive analog line
isolation transformer.
Receive Positive Rail Data.
Valid when the FRAMER pin is strapped to 0 V.
NRZ serial data latched by the rising edge of RLCK. Data rates:
DS1-1.544 Mbits/s; CEPT-2.048 Mbits/s. Optional single-rail NRZ receive
data latched by the rising edge of RLCK.
Analog 5 V Power Supply. 5 V ± 5%.
Transmit Line Driver Ground Reference.
13
14,
18
15
25
20,
24
23
V
DDA
GRNDX
P
P
TRING
O
Transmit Bipolar Ring.
Negative bipolar output data to the transmit analog
isolation transformer.
Transmit Line Driver 5 V Power Supply.
5 V ± 5%.
Transmit Bipolar Tip.
Positive bipolar output data to the transmit analog
isolation transformer.
5 V Power Supply.
5 V ± 5%.
16
17
22
21
V
DD
X
TTIP
P
O
37, 72,
108, 144
143
V
DD
P
39
LOPLLCK
O
Loss of PLLCK Clock.
This pin is asserted high when the PLLCK clock does
not toggle for a 250 μs interval. This pin is deasserted 250 μs after PLLCK
clock restarts toggling.
DS1/CEPT.
Strap to V
DD
to enable defaults for DS1 operation. Strap to V
SS
to
enable defaults for CEPT operation.
Framer Mode.
Strap to V
DD
to enable integrated LIU and framer operation.
Strap to V
SS
to bypass the LIU section; the receive framer is sourced directly
from the RPD, RND, and RLCK pins while the TPD, TND, and TLCK pins are
driven by the transmit framer.
3-State (Active-Low).
Asserting this pin low forces the channel outputs into a
high-impedance state. Asserting both 3-state pins low forces all outputs into a
high-impedance state.
Reset (Active-Low).
Asserting this pin low resets the channel.
Asserting both RESET pins low resets the entire device including the global
registers.
Transmit Line Interface Positive-Rail Data.
This signal is the transmit
framer positive NRZ output data. Data changes on the rising edge of TLCK.
In the single-rail mode, TPD = transmit framer data.
142
40
DS1/CEPT
I
u
141
41
FRAMER
I
u
140
42
3-STATE
I
u
139
43
RESET
I
u
138
44
TPD
O