T7256 Agere Systems, T7256 Datasheet - Page 5

• Manufacturer Part Number: T7256
• Description: (T7234 - T7256) Compliance
• Manufacturer: Agere Systems

Data Sheet
February 1998
Features
U- to S/T-interface conversion for ISDN basic rate
(2B+D) systems
— Integrated U- and S/T-interfaces
— Operates in stand-alone mode to provide U- and
— Automatic embedded operations channel (eoc)
— Low power consumption supporting line-pow-
— Idle-mode support (35 mW typical)
— Board-level testability support
U-interface
— Conforms to ANSI T1.601 standard and ETSI
— 2B1Q four-level line code
— Automatic ANSI maintenance functions (quiet
S/T-interface
— Conforms to ANSI T1.605 standard, ITU-T I.430
Other
— Single +5 V ( 5%) supply
— –40 C to +85 C
— 44-pin PLCC
S/T-interface activation, control, and mainte-
nance functions
processing for ANSI T1.601 systems
ered NT1 (See Table 15 on page 49, Question
and Answers section, #47 for detailed power
consumption information)
ETR 080 technical report
mode and insertion loss mode plus the MLT
function as an option for North America)
recommendation, and ETSI ETS 300 012 for NT
operation
T7234 Single-Chip NT1 (SCNT1)
Description
The Lucent Technologies Microelectronics Group
T7234 Single-Chip NT1 (SCNT1) Transceiver inte-
grated circuit provides data (2B+D) and control infor-
mation conversion between 2-wire (U-interface) and
4-wire (S/T-interface) digital subscriber loops on the
integrated services digital network (ISDN). The
T7234 conforms to the ANSI T1.601 standard and
ETSI ETR 080 technical report for the U-interface
and the ITU-T I.430 recommendation, ANSI T1.605
standard, and ETSI ETS 300 012 for the S/T-inter-
face. The single +5 V CMOS device is packaged in a
44-pin plastic leaded chip carrier (PLCC).
Euro-LITE Transceiver