SN74AVCH245

更新时间： 2024-11-04 09:15:07

品牌	Logo	应用领域
德州仪器 - TI		总线收发器输出元件
页数	文件大小	规格书
12页	170K
描述
OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

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SN74AVCH245 数据手册

SN74AVCH245

OCTAL BUS TRANSCEIVER

WITH 3-STATE OUTPUTS

SCES264C – APRIL 1999 – REVISED DECEMBER 1999

DOC (Dynamic Output Control) Circuit

Dynamically Changes Output Impedance,

Resulting in Noise Reduction Without

Speed Degradation

Overvoltage-Tolerant Inputs/Outputs Allow

Mixed-Voltage-Mode Data Communications

Supports Partial-Power-Down Mode

off

Operation

EPIC (Enhanced-Performance Implanted

CMOS) Submicron Process

Bus Hold on Data Inputs Eliminates the

Need for External Pullup/Pulldown

Resistors

Less Than 2-ns Maximum Propagation

Delay at 2.5-V and 3.3-V V

Package Options Include Plastic

Small-Outline (DW), Thin Very

Small-Outline (DGV), and Thin Shrink

Small-Outline (PW) Packages

Dynamic Drive Capability Is Equivalent to

Standard Outputs With I and I of

±24 mA at 2.5-V V

description

A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output

impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1

shows typical V vs I and V

vs I

curves to illustrate the output impedance and drive capability of the

circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is

equivalent to a high-drive standard-output device. For more information, refer to the TI application reports, AVC

Logic Family Technology and Applications, literature number SCEA006, and Dynamic Output Control (DOC )

Circuitry Technology and Applications, literature number SCEA009.

3.2

= 25°C

Process = Nominal

2.8 Process = Nominal

2.8

2.4

2.0

1.6

1.2

0.8

0.4

2.4

= 3.3 V

2.0

1.6

1.2

0.8

= 2.5 V

= 1.8 V

= 3.3 V

= 2.5 V

0.4

= 1.8 V

–128 –112 –96 –80 –64

–32

–160 –144

–48

– Output Current – mA

–16

85 102 119 136 153 170

– Output Current – mA

Figure 1. Output Voltage vs Output Current

This octal bus transceiver is operational at 1.2-V to 3.6-V V , but is designed specifically for 1.65-V to 3.6-V

operation.

The SN74AVCH245 is designed for asynchronous communication between data buses. The device transmits

data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the

direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are

effectively isolated.

This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission from the

A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR)

input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated.

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.

DOC, EPIC, and Widebus are trademarks of Texas Instruments Incorporated.

PRODUCT PREVIEW information concerns products in the formative or

design phase of development. Characteristic data and other

specifications are design goals. Texas Instruments reserves the right to

change or discontinue these products without notice.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7...12

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与SN74AVCH245相关器件

型号	品牌	获取价格	描述	数据表
SN74AVCH245DGV	TI	获取价格	OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SN74AVCH245DGVR	TI	获取价格	AVC SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, PLASTIC, TVSOP-20
SN74AVCH245DW	TI	获取价格	OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SN74AVCH245PW	TI	获取价格	OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SN74AVCH245PWLE	TI	获取价格	AVC SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, PLASTIC, TSSOP-20
SN74AVCH245PWR	TI	获取价格	AVC SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, TSSOP-20
SN74AVCH24T245	TI	获取价格	24-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPU
SN74AVCH24T245_V01	TI	获取价格	24-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation And 3-State Outpu
SN74AVCH24T245GRG	TI	获取价格	24-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation And 3-State Outpu
SN74AVCH24T245GRG/ZRG	TI	获取价格	24-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation And 3-State Outpu

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