Datasheet > SN74FB2040

SN74FB2040

更新时间： 2024-09-14 22:37:03

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
7页	101K
描述
8-BIT TTL/BTL TRANSCEIVER

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SN74FB2040 数据手册

SN74FB2040

8-BIT TTL/BTL TRANSCEIVER

SCBS173I – NOVEMBER 1991 – REVISED SEPTEMBER 1999

Compatible With IEEE Std 1194.1-1991

(BTL)

High-Impedance State During Power Up

and Power Down

TTL A Port, Backplane Transceiver Logic

(BTL) B Port

BIAS V

Pin Minimizes Signal Distortion

During Live Insertion or Withdrawal

Open-Collector B-Port Outputs Sink

100 mA

B-Port Biasing Network Preconditions the

Connector and PC Trace to the BTL

High-Level Voltage

Isolated Logic-Ground and Bus-Ground

Pins Reduce Noise

Packaged in Plastic Quad Flatpack

RC PACKAGE

(TOP VIEW)

52 51 50 49 48 47 46 45 44 43 42 41 40

GND

AI2

AI3

AO3

GND

AO4

GND

AI4

GND

AI5

AO5

GND

AO6

GND

14 15 16 17 18 19 20 21 22 23 24 25 26

description

The SN74FB2040 device is an 8-bit transceiver designed to translate signals between TTL and backplane

transceiver logic (BTL) environments.

The B port operates at BTL-signal levels. The open-collector B ports are specified to sink 100 mA. Two output

enables (OEB and OEB) are provided for the B outputs. When OEB is high and OEB is low, the B port is active

and reflects the inverse of the data present at the A-input pins. When OEB is low, OEB is high, or V

than 2.1 V, the B port is turned off.

is less

The A port operates at TTL-signal levels and has separate input and output pins. The A outputs reflect the

inverse of the data at the B port when the A-port output enable (OEA) is high. When OEA is low or when V

is less than 2.1 V, the A outputs are in the high-impedance state.

Pins are allocated for the four-wire IEEE Std 1149.1 (JTAG) test bus. TMS and TCK are not connected and TDI

is shorted to TDO.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7

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