DS21348G Maxim Integrated Products, DS21348G Datasheet - Page 20

• Manufacturer Part Number: DS21348G
• Description: IC LIU T1/E1/J1 3.3V 49-BGA
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS21348G

• Number Of Drivers/receivers: 1/1
• Protocol: T1/E1/J1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 49-CSBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Note: G.703 requires an accuracy of ±50ppm for both T1 and E1. TR62411 and ANSI specs require an accuracy of ±32ppm for
T1 interfaces.
TTIP/TRING
TX0/TX1
NAME
TNEG
TPOS
TEST
VDD
VSM
TPD
VSS
34/37
14/15
21/36
22/35
PIN
26
42
13
41
20
I/O
—
—
O
I
I
I
I
I
I
Tri-State Control. Set high to tri-state all outputs and I/O pins
(including the parallel control port). Set low for normal operation.
Useful in board-level testing.
Transmit Negative Data. Sampled on the falling edge (CES = 0) or
the rising edge (CES = 1) of TCLK for data to be transmitted out
onto the line.
Transmit Power-Down
0 = normal transmitter operation
1 = powers down the transmitter and tri-states the TTIP and TRING
pins
Transmit Positive Data. Sampled on the falling edge (CES = 0) or
the rising edge (CES = 1) of TCLK for data to be transmitted out
onto the line.
Transmit Tip and Ring [TTIP and TRING]. Analog line driver
outputs. These pins connect via a step-up transformer to the line.
See Section
Transmit Data Source Select Bits 0 and 1 [H/W Mode]. These
inputs determine the source of the transmit data. See
Positive Supply. 3.3V ±5%
Voltage Supply Mode. Should be tied low for 3.3V operation.
Signal Ground
5
20 of 76
for details.
FUNCTION
Table
2-9.