DS2143QN Maxim Integrated Products, DS2143QN Datasheet - Page 2
![IC CONTROLLER E1 5V LP 44-PLCC](/photos/6/62/66291/175-44-plcc_sml.jpg)
DS2143QN
Manufacturer Part Number
DS2143QN
Description
IC CONTROLLER E1 5V LP 44-PLCC
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2143Q.pdf
(44 pages)
Specifications of DS2143QN
Controller Type
E1 Controller
Interface
Parallel/Serial
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
10mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
44-LCC, 44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DS2143QN+
Manufacturer:
Maxim Integrated Products
Quantity:
135
Company:
Part Number:
DS2143QN/T&R
Manufacturer:
Maxim Integrated
Quantity:
10 000
can access. These internal registers are used to configure the device and obtain information from the E1
link. The device fully meets al l of the latest E1 specifications, including CCITT G.704, G.706, and
G.732.
1.0 INTRODUCTION
The DS2143 E1 Controller has four main sections: the receive side, the transmit side, the line interface
controller, and the parallel control port. See the Block Diagram. On the receive side, the device will
clock in the serial E1 stream via the RPOS and RNEG pins. The synchronizer will locate the frame and
multiframe patterns and establish their respective positions. This information will be used by the rest of
the receive side circuitry.
The DS2143 is an “off-line” framer, which means that all of the E1 serial stream that goes into the device
will come out of it unchanged. Once the E1 data has been framed to, the signaling data can be extracted.
The two-frame elastic store can either be enabled or bypassed.
The transmit side clocks in the unframed E1 stream at TSER and add in the framing pattern and the
signaling. The line interface control port will update line interface devices that contain a serial port. The
parallel control port contains a multiplexed address and data structure which can be connected to either a
microcontroller or microprocessor.
Reader’s Note:
This data sheet assumes a particular nomenclature of the E1 operating environment. There are 32 8-bit
timeslots in an E1 systems which are number 0 to 31. Timeslot 0 is transmitted first and received first.
These 32 timeslots are also referred to as channels with a numbering scheme of 1 to 32. Timeslot 0 is
identical to channel 1, timeslot 1 is identical to channel 2, and so on. Each timeslot (or channel) is made
up of 8 bits which are numbered 1 to 8. Bit number 1 is the MSB and is transmitted first. Bit number 8 is
the LSB and is transmitted last. Throughout this data sheet, the following abbreviations will be used:
FAS
CRC4
CAS
CCS
MF
Sa
Si
E-bit
Frame Alignment Signal
Cyclical Redundancy Check
Channel Associated Signaling
Common Channel Signaling
Multiframe
Additional bits
International bits
CRC4 Error Bits
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DS2143/DS2143Q