DS21348T+ Maxim Integrated Products, DS21348T+ Datasheet - Page 6
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DS21348T+
Manufacturer Part Number
DS21348T+
Description
IC LIU T1/E1/J1 3.3V 44-TQFP
Manufacturer
Maxim Integrated Products
Type
Line Interface Units (LIUs)r
Datasheet
1.DS21348G.pdf
(76 pages)
Specifications of DS21348T+
Number Of Drivers/receivers
1/1
Protocol
T1/E1/J1
Voltage - Supply
3.135 V ~ 3.465 V
Mounting Type
Surface Mount
Package / Case
44-TQFP, 44-VQFP
Product
Framer
Number Of Transceivers
1
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
100 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
1. INTRODUCTION
The analog AMI/HDB3 waveform off of the E1 line or the AMI/B8ZS waveform off of the T1 line is
transformer coupled into the RTIP and RRING pins of the DS21348. The user has the option to use
internal termination, software selectable for 75Ω/100Ω/120Ω applications, or external termination. The
device recovers clock and data from the analog signal and passes it through the jitter attenuation MUX
outputting the received line clock at RCLK and bipolar or NRZ data at RPOS and RNEG. The DS21348
contains an active filter that reconstructs the analog received signal for the nonlinear losses that occur in
transmission. The receive circuitry is also configurable for various monitor applications. The device has a
usable receive sensitivity of 0dB to -43dB for E1 and 0dB to -36dB for T1, which allows the device to
operate on 0.63mm (22AWG) cables up to 2.5km (E1) and 6k feet (T1) in length. Data input at TPOS and
TNEG is sent via the jitter attenuation mux to the waveshaping circuitry and line driver. The DS21348
will drive the E1 or T1 line from the TTIP and TRING pins via a coupling transformer. The line driver
can handle both CEPT 30/ISDN-PRI lines for E1 and long-haul (CSU) or short-haul (DSX-1) lines for
T1.
1.1 Document Revision History
REVISION
011801
092101
101104
113004
011206
Data sheet revised for 3.3V only.
Added supply current measurements
Added thermal characteristics of quad package
Corrected typos and removed all instances of 5V operation.
Updated the storage and soldering temperature specs in the Absolute
Maximum Ratings section.
Added lead-free packages to Ordering Information table on page 1.
DESCRIPTION
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