HD74HCT623FP [HITACHI]

Bus Transceiver, HCT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO20, FP-20DA;


型号：	HD74HCT623FP
厂家：	HITACHI SEMICONDUCTOR
描述：	Bus Transceiver, HCT Series, 1-Func, 8-Bit, True Output, CMOS, PDSO20, FP-20DA 光电二极管逻辑集成电路
文件：	总9页 (文件大小：56K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

HD74HCT620/HD74HCT623

Octal Bus Transceivers (with inverted 3-state outputs)/

Octal Bus Transceivers (with 3-state outputs)

Description

This octal transceiver is designed for asynchronous two-way communication between data buses. The

control function implementation allows for maximum flexibility in timng.

This device allows data transmission from A bus to the B bus or from the B bus to the A bus depending

upon the logic levels at the enable inputs (GBA and GAB).

The enable inputs can be used to disable the device so that the buses are affectively isolated.

The dual-enable configuration gives these devices the capability to store data by simultaneous enabling of

GBA and GAB. Each output reinforces its input in this transceiver configuration. Thus, when both control

inputs are enabled and all other data sources to the two sets of bus lines are at high impedance, both sets of

bus lines (16 in all) will remain at their last states. The 8-bit codes appearing on the two sets of buses will

be identical for the HD74HCT623 or complementary for the HD74HCT620.

Features

•

LSTTL Output Logic Level Compatibility as well as CMOS Output Compatibility

High Speed Operation: t_pd(Bus to Bus) = 15 ns typ (C_L= 50 pF)

High Output Current: Fanout of 15 LSTTL Loads

Wide Operating Voltage: V_CC= 4.5 to 5.5 V

Low Input Current: 1 µA max

Low Quiescent Supply Current: I_CC(static) = 4 µA max (Ta = 25°C)

HD74HCT620/HD74HCT623

Function Table

Enable Input

Operation

GBA

GAB

HD74HCT620

B data to A bus

A data to B bus

Isolation

HD74HCT623

B data to A bus

A data to B bus

Isolation

B data to A bus,

A data to B bus

B data to A bus,

A data to B bus

Pin Arrangement

Enable GAB

20 V_CC

19 Enable GBA

18 B1

17 B2

16 B3

15 B4

14 B5

13 B6

12 B7

GND 10

11 B8

(Top view)

HD74HCT620/HD74HCT623

Block Diagram

HD74HCT620

GAB

GBA

V_CC

HD74HCT620/HD74HCT623

HD74HCT623

GAB

GBA

V_CC

Absolute Maximum Ratings

Item

Symbol

Rating

Unit

Supply voltage range

Input voltage

V_CC

V_IN

–0.5 to +7.0

–0.5 to V_CC+ 0.5

Output voltage

V_OUT

I_OUT

I_CC, I_GND

I_IK

–0.5 to V_CC+ 0.5

DC current drain per pin

DC current drain per V_CC, GND

DC input diode current

DC output diode current

Power dissipation per package

Storage temperature

±35

°C

±75

±20

I_OK

±20

P_T

500

Tstg

–65 to +150

HD74HCT620/HD74HCT623

DC Characteristics

Ta = –40 to

Ta = 25°C

+85°C

Test Conditions

Item

Symbol Min Typ Max Min Max Unit V_CC(V)

Input voltage

V_IH

2.0

—

2.0

—

4.5 to

5.5

V_IL

—

0.8

—

0.8

4.5 to

5.5

Output voltage

V_OH

4.4

—

4.4

4.13

—

4.5

5.5

Vin = V_IHor V_ILI_OH= –20 µA

I_OH= –6 mA

4.18 —

—

V_OL

—

0.1

0.33

Vin = V_IHor V_ILI_OL= 20 µA

I_OL= 6 mA

0.26 —

Off-state output

current

I_OZ

Iin

±0.5 —

±5.0 µA

Vin = V_IHor V_IL,

Vout = V_CCor GND

Input current

—

±0.1 —

±1.0 µA

5.5

Vin = V_CCor GND

Quiescent supply I_CC

current

4.0

—

µA

Vin = V_CCor GND, Iout = 0 µA

AC Characteristics (C_L= 50 pF, Input t_r= t_f= 6 ns)

Ta = –40 to

Ta = 25°C

+85°C

Test Conditions

Item

Propagation delay t_PLH

Symbol Min Typ Max Min Max Unit V_CC(V)

—

13 20

16 20

16 30

19 30

21 30

—

4.5

time

t_PHL

t_ZH

t_ZL

Output enable

time

Output disable

time

t_HZ

t_LZ

t_TLH

t_THL

Output rise/fall

time

Input capacitance Cin

—

Unit: mm

24.50

25.40 Max

1.30

0.89

7.62

1.27 Max

+ 0.11

– 0.05

0.25

2.54 ± 0.25

0.48 ± 0.10

0° – 15°

Hitachi Code

JEDEC

EIAJ

DP-20N

—

Conforms

Weight (reference value) 1.26 g

Unit: mm

12.6

13 Max

+ 0.20

7.80

– 0.30

0.80 Max

1.15

0° – 8°

1.27

0.70 ± 0.20

*0.42 ± 0.08

0.40 ± 0.06

0.15

0.12 M

Hitachi Code

JEDEC

FP-20DA

—

EIAJ

Conforms

*Dimension including the plating thickness

Base material dimension

Weight (reference value) 0.31 g

Unit: mm

12.8

13.2 Max

+ 0.25

– 0.40

10.40

0.935 Max

1.45

0° – 8°

+ 0.57

– 0.30

1.27

0.70

*0.42 ± 0.08

0.40 ± 0.06

0.15

0.12

Hitachi Code

JEDEC

EIAJ

FP-20DB

Conforms

—

*Dimension including the plating thickness

Base material dimension

Weight (reference value) 0.52 g

Cautions

1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,

Hitachi bears no responsibility for problems that may arise with third party’s rights, including

intellectual property rights, in connection with use of the information contained in this document.

2. Products and product specifications may be subject to change without notice. Confirm that you have

received the latest product standards or specifications before final design, purchase or use.

3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,

contact Hitachi’s sales office before using the product in an application that demands especially high

quality and reliability or where its failure or malfunction may directly threaten human life or cause risk

of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,

traffic, safety equipment or medical equipment for life support.

4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly

for maximum rating, operating supply voltage range, heat radiation characteristics, installation

conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used

beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable

failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-

safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other

consequential damage due to operation of the Hitachi product.

5. This product is not designed to be radiation resistant.

6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without

written approval from Hitachi.

7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor

products.

Hitachi, Ltd.

Semiconductor & Integrated Circuits.

Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan

Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109

URL

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Japan

: http://www.hitachi.co.jp/Sicd/indx.htm

For further information write to:

Hitachi Semiconductor

(America) Inc.

Hitachi Europe GmbH

Hitachi Asia (Hong Kong) Ltd.

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Tel: <44> (1628) 585000

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