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REV: 071103
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
GENERAL DESCRIPTION
The DS3146/DS3148/DS31412 (DS314x) devices
include all necessary circuitry to frame and format up
to 12 separate DS3 or E3 channels. Each framer in
these devices is independently configurable to
support M23 DS3, C-Bit Parity DS3, or G.751 E3.
The framers interface to a variety of line interface
units (LIUs), microprocessor buses, and other system
components without glue logic. Each DS3/E3 framer
has its own HDLC controller, FEAC controller, and
BERT, as well as full support for error detection and
generation, performance monitoring, and loopbacks.
APPLICATIONS
SONET/SDH Muxes
PDH Muxes
Digital Cross-Connect Systems
Access Concentrators
ATM and Frame Relay Equipment
Routers
FUNCTIONAL DIAGRAM
FEATURES
§ 6/8/12 Independent DS3/E3 Framers on a Single
Die
§ Framing and Formatting to M23 DS3, C-Bit Parity
DS3, and G.751 E3
§ LIU Interface can be Binary (NRZ) or Dual-Rail
(POS/NEG)
§ B3ZS/HDB3 Encoder and Decoder
§ Generate and Detect DS3/E3 Alarms
§ Integrated HDLC Controller for Each Channel
§ Integrated FEAC Controller for Each Channel
§ Integrated Bit Error-Rate Tester (BERT) for Each
Channel
§ Large Performance-Monitoring Counters
§ Line, Diagnostic, and Payload Loopbacks
§ Externally Controlled Transmit Overhead
Insertion Port
§ Support External Timing or Loop-Timing
§ Framers can be Powered Down When Not Used
§ 8-Bit Processor Port Supports Muxed or
Nonmuxed Bus Operation (Intel or Motorola)
§ 3.3V Supply with 5V Tolerant I/O
§ 349-Pin, 27mm x 27mm BGA Package
§ IEEE 1149.1 JTAG Support
ORDERING INFORMATION
PART
NO. OF
FRAMERS
TEMP RANGE
PIN-PACKAGE
DS3146
6
0°C to +70
°C
349 BGA
DS3146N
6
-40°C to +85
°C
349 BGA
DS3148
8
0°C to +70
°C
349 BGA
DS3148N
8
-40°C to +85
°C
349 BGA
DS31412
12
0°C to +70
°C
349 BGA
DS31412N
12
-40°C to +85
°C
349 BGA
www.maxim-ic.com
DS3146/DS3148/DS31412
6-/8-/12-Channel DS3/E3 Framers
POS/NRZ
NEG/LCV
CLK
DATA
SYNC
RECEIVE
FRAMER
TRANSMIT
FORMATTER
CLK
DATA
SYNC
POS/NRZ
NEG
CLK
LIU
INTERFACE
SYSTEM
INTERFACE
OVERHEAD
EACH FRAMER
Dallas
Semiconductor
DS3146/DS3148/DS31412
Pin Configurations appear at end of data sheet.
DESIGN KIT AVAILABLE