T7121中文资料AGERE数据手册PDF规格书
T7121规格书详情
描述 Description
The T7121 HDLC Interface for ISDN (HIFI-64) connects serial communications links carrying HDLC bitsynchronous data frames to 8-bit microcomputer systems. There is an optional transparent mode of operation in which no HDLC processing is performed on user data. The device communicates with the system microprocessor as a memory-mapped peripheral and is controlled by reading and writing 19 internal registers. The chip can be instructed to interrupt the microprocessor when it detects certain events requiring microprocessor attention.
特性 Features
■ Low-cost device for B-channel (64 kbits/s) or D-channel (16 kbits/s) data transport.
■ Optional transparent mode—no HDLC framing is performed.
■ Frame sync (FS) allows a slot-select feature to access an individual time slot in any TDM data stream (e.g., Lucent Technologies Microelectronics Group Concentration Highway Interface [CHI] or subset).
■ Bit-masking option allows effective data rates of 8, 16, 24, 32, 40, 48, and 56 kbits/s.
■ Maximum data rate up to 4.096 MHz.
■ Serial data-transfer pins for direct connection to the Lucent ISDN line transceiver T7250C.
■ Supports IOM2, K2, GCI, and SLD interface.
■ Parallel microprocessor interface with either multiplexed or demultiplexed address and data lines for easy interface with any microprocessor.
■ Single interrupt output signal with seven maskable interrupt conditions.
■ Programmable interrupt modes.
■ Memory-mapped read and write registers.
■ TTL/CMOS compatible input/output.
■ 3-state output pins to assist system diagnostics.
■ Low-power 1.25 µm CMOS:
— 30 mW typical operation at 12 MHz.
— 5 mW standby mode (typical).
■ HDLC transceiver:
— Stand-alone HDLC framing operation.
— 64-byte FIFO in both transmit and receive directions.
— Supports block-move instruction.
— Multiple frames allowed in FIFO.
— Programmable FIFO full- and empty-level interrupt.
产品属性
- 型号:
T7121
- 制造商:
AGERE
- 制造商全称:
AGERE
- 功能描述:
T7121 HDLC Interface for ISDN
| 供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
|---|---|---|---|---|---|---|---|
LUCENTT |
22+ |
SOP28 |
100000 |
代理渠道/只做原装/可含税 |
询价 | ||
LUCENTT |
2026+ |
SOP28 |
54658 |
百分百原装现货 实单必成 |
询价 | ||
LUCENTT |
24+ |
SOP28 |
35400 |
全新原装现货/假一罚百! |
询价 | ||
AGERESYST |
25+23+ |
SOJ28 |
54625 |
绝对原装正品现货,全新深圳原装进口现货 |
询价 | ||
AT&T |
23+ |
SOJ-28 |
7000 |
绝对全新原装!100%保质量特价!请放心订购! |
询价 | ||
LUCENTT |
SOP28 |
3000 |
一级代理 原装正品假一罚十价格优势长期供货 |
询价 | |||
LUCENT |
22+ |
PLCC |
20000 |
只做原装 品质保障 |
询价 | ||
AGERESYSTEMS |
22+ |
SOJ28 |
5000 |
原装现货库存.价格优势 |
询价 | ||
24+ |
3000 |
自己现货 |
询价 | ||||
LUCENT |
QFP132 |
95+ |
6 |
全新原装进口自己库存优势 |
询价 |


