HD74HC237RP-EL [HITACHI]

Decoder/Driver, HC/UH Series, True Output, CMOS, PDSO16, SOP-16;


型号：	HD74HC237RP-EL
厂家：	HITACHI SEMICONDUCTOR
描述：	Decoder/Driver, HC/UH Series, True Output, CMOS, PDSO16, SOP-16 解码器解复用器
文件：	总9页 (文件大小：59K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

HD74HC237

3-to-8-line Decoder/Demultiplexer with Address Latch

Description

The HD74HC237 decodes a three-bit Address to one-of-eight active-high outputs. The device has a

transparent latch for storage of the Address. Two Chip Selects, one active-low and one active-high, are

provided to facilitate the demultiplexing, cascading, and chip-selecting functions.

The demultiplexing function is accomplished by using the Address inputs to select the desired device

output, and then by using one of the Chip Selects as a data input while holding the other one active.

The HD74HD237 is the noninverting version of the HD74HC137.

Features

•

High Speed Operation: t_pd(Data to Y) = 19 ns typ (C_L= 50 pF)

High Output Current: Fanout of 10 LSTTL Loads

Wide Operating Voltage: V_CC= 2 to 6 V

Low Input Current: 1 µA max

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

HD74HC237

Function Table

Inputs

Enable

Select

Outputs

G₁

G₂

Y₀

Y₁

Y₂

Y₃

Y₄

Y₅

Y₆

Y₇

Output corresponding to stored address H; all others L

Pin Arrangement

16 V_CC

Y₀

Y₁

Y₂

Y₃

Y₄

Y₅

15 Y₀

14 Y₁

13 Y₂

12 Y₃

11 Y₄

10 Y₅

G₂

G₁

Y₇

G₂

G₁

Y₇

Y₆

GND

Y₆

(Top view)

HD74HC237

Logic Diagram

Y₀

Y₁

Y₂

Y₃

Y₄

Y₅

Y₆

Y₇

G₂

G₁

HD74HC237

DC Characteristics

Ta = –40 to

Ta = 25°C

+85°C

Item

Symbol V_CC(V) Min Typ Max Min Max Unit Test Conditions

Input voltage

V_IH

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

4.5

6.0

2.0

4.5

6.0

4.5

6.0

1.5

—

0.5

1.5

3.15

4.2

—

3.15 —

—

4.2

—

V_IL

0.5

1.35

1.8

—

1.35 —

1.8

—

Output voltage

V_OH

1.9 2.0

4.4 4.5

5.9 6.0

4.18 —

5.68 —

1.9

4.4

5.9

4.13

5.63

—

Vin = V_IHor V_ILI_OH= –20 µA

—

I_OH= –4 mA

I_OH= –5.2 mA

—

V_OL

—

0.0 0.1

0.1

0.33

Vin = V_IHor V_ILI_OL= 20 µA

—

0.26 —

±0.1 —

4.0

I_OL= 4 mA

I_OL= 5.2 mA

Input current

Iin

±1.0 µA

40 µA

Vin = V_CCor GND

Quiescent supply I_CC

current

—

Vin = V_CCor GND, Iout = 0 µA

HD74HC237

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

Ta = –40 to

+85°C

Ta = 25°C

Symbol V_CC(V) Min Typ Max Min Max Unit Test Conditions

Item

Propagation delay t_PLH

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

2.0

4.5

6.0

—

185 —

230 ns

Data to Y

G₂to Y

G₁to Y

GL to Y

time

t_PHL

19 37

—

145 —

180 ns

14 29

—

145 —

180 ns

14 29

—

190 —

240 ns

21 38

—

100

—

Pulse width

Hold time

t_w

—

–4

—

t_h

Setup time

t_su

—

Output rise/fall

time

t_TLH

t_THL

—

Input capacitance Cin

Unit: mm

19.20

20.00 Max

1.3

1.11 Max

7.62

+ 0.13

– 0.05

0.25

2.54 ± 0.25

0.48 ± 0.10

0° – 15°

Hitachi Code

DP-16

JEDEC

EIAJ

Conforms

Weight (reference value) 1.07 g

Unit: mm

10.06

10.5 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

Hitachi Code

JEDEC

EIAJ

FP-16DA

—

Conforms

*Dimension including the plating thickness

Base material dimension

Weight (reference value) 0.24 g

Unit: mm

9.9

10.3 Max

1.27

+ 0.10

6.10

– 0.30

1.08

0.635 Max

0° – 8°

+ 0.67

0.60

– 0.20

*0.42 ± 0.08

0.40 ± 0.06

0.15

0.25

Hitachi Code

JEDEC

EIAJ

FP-16DN

Conforms

*Dimension including the plating thickness

Base material dimension

Weight (reference value) 0.15 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

NorthAmerica

Europe

: http:semiconductor.hitachi.com/

: http://www.hitachi-eu.com/hel/ecg

Asia (Singapore)

Asia (Taiwan)

: http://www.has.hitachi.com.sg/grp3/sicd/index.htm

: http://www.hitachi.com.tw/E/Product/SICD_Frame.htm

Asia (HongKong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm

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.

Group III (Electronic Components)

7/F., North Tower, World Finance Centre,

Harbour City, Canton Road, Tsim Sha Tsui,

Kowloon, Hong Kong

Tel: <852> (2) 735 9218

Fax: <852> (2) 730 0281

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Tel: 535-2100

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Germany

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179 East Tasman Drive,

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3F, Hung Kuo Building. No.167,

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Telex: 40815 HITEC HX

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Maidenhead

Berkshire SL6 8YA, United Kingdom

Tel: <44> (1628) 585000

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