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DS21Q42T+

Description
IC framer enhanced T1 4X 128tqfp
CategoryWireless rf/communication    Telecom circuit   
File Size939KB,116 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric View All

DS21Q42T+ Overview

IC framer enhanced T1 4X 128tqfp

DS21Q42T+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeQFP
package instructionTQFP-128
Contacts128
Reach Compliance Codecompli
ECCN codeEAR99
JESD-30 codeR-PQFP-G128
JESD-609 codee3
length20 mm
Humidity sensitivity level3
Number of functions1
Number of terminals128
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeLFQFP
Encapsulate equivalent codeQFP128,.63X.87,20
Package shapeRECTANGULAR
Package formFLATPACK, LOW PROFILE, FINE PITCH
Peak Reflow Temperature (Celsius)260
power supply3.3 V
Certification statusNot Qualified
Maximum seat height1.6 mm
Nominal supply voltage3.3 V
surface mountYES
technologyCMOS
Telecom integrated circuit typesFRAMER
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature30
width14 mm
DS21Q42
Enhanced Quad T1 Framer
www.maxim-ic.com
FEATURES
§
§
§
§
§
§
§
§
§
§
§
§
Four T1 DS1/ISDN-PRI/J1 framing
transceivers
All four framers are fully independent
Each of the four framers contain dual two-
frame elastic-store slip buffers that can connect
to asynchronous backplanes up to 8.192MHz
8-bit parallel control port that can be used
directly on either multiplexed or
nonmultiplexed buses (Intel or Motorola)
Programmable output clocks for Fractional T1
Fully independent transmit and receive
functionality
Integral HDLC controller with 64-byte buffers
configurable for FDL or DS0 operation
Generates and detects in-band loop codes from
1 to 8 bits in length including CSU loop codes
Pin compatible with DS21Q44 E1 enhanced
quad E1 framer
3.3V supply with 5V tolerant I/O; low-power
CMOS
Available in 128-pin TQFP package
IEEE 1149.1 support
FUNCTIONAL DIAGRAM
Receive
Fram
er
Transm
it
Form
atter
FRAMER #0
FRAMER #1
FRAMER #2
FRAMER #3
Control Port
Elastic
Store
Elastic
Store
ACTUAL SIZE
QUAD
T1
FRAMER
ORDERING INFORMATION
DS21Q42T
DS21Q42TN
0°C to +70°C
-40°C to +85°C
DESCRIPTION
The DS21Q42 is an enhanced version of the DS21Q41B quad T1 framer. The DS21Q42 contains four
framers that are configured and read through a common microprocessor-compatible parallel port. Each
framer consists of a receive framer, receive elastic store, transmit formatter, and transmit elastic store. All
four framers in the DS21Q42 are totally independent; they do not share a common framing synchronizer.
The transmit and receive sides of each framer are also totally independent. The dual two-frame elastic
stores contained in each of the four framers can be independently enabled and disabled as required. The
device fully meets all of the latest T1 specifications including ANSI T1.403-1995, ANSI T1.231-1993,
AT&T TR 62411 (12–90), AT&T TR54016, and ITU G.704 and G.706.
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple
revisions of any device may be simultaneously available through various sales channels. For information about device errata,
click here:
http://www.maxim-ic.com/errata.
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