ETC HD74HC242/HD74HC243

HD74HC242/HD74HC243
Quad. Bus Transceivers (with 3-state outputs)
Quad. Bus Transceivers (with noninverted 3-state outputs)
ADE-205-473 (Z)
1st. Edition
Sep. 2000
Description
The HD74HC242 is an inverting buffer and the HD74HC243 is a noninverting buffer. Each device has one
active high enable (GBA), and one active low enable (GAB). GBA enables the A output and GAB enables
the B outputs. The device does not have schmitt trigger inputs.
Features
•
•
•
•
•
High Speed Operation: tpd = 10 ns typ (CL = 50 pF)
High Output Current: Fanout of 15 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Control inputs
HD74HC242
HC74HC243
Data Port Status
Data Port Status
GAB
GBA
A
B
A
B
H
H
O
I
O
I
L
H
Z
Z
Z
Z
H
L
Z
Z
Z
Z
L
L
I
O
I
O
I
O
O
Z
:
:
:
:
Input
Output
Inverting Output
Hight Impedance
HD74HC242/HD74HC243
Pin Arrangement
HD74HC242
GAB
1
14
VCC
NC
2
13
GBA
1A
3
12
NC
2A
4
11
1B
3A
5
10
2B
4A
6
9
3B
GND
7
8
4B
(Top view)
HD74HC243
GAB
1
14
VCC
NC
2
13
GBA
1A
3
12
NC
2A
4
11
1B
3A
5
10
2B
4A
6
9
3B
GND
7
8
4B
(Top view)
2
HD74HC242/HD74HC243
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Supply voltage range
VCC
–0.5 to +7.0
V
Input voltage
VIN
–0.5 to VCC + 0.5
V
Output voltage
VOUT
–0.5 to VCC + 0.5
V
DC current drain per pin
I OUT
±35
mA
DC current drain per VCC, GND
I CC, I GND
±75
mA
DC input diode current
I IK
±20
mA
DC output diode current
I OK
±20
mA
Power Dissipation per package
PT
500
mW
Storage temperature
Tstg
–65 to +150
°C
Logic Diagram
HD74HC242
1 of 4
Transceivers
A
VCC
VCC
B
GBA
GAB
3
HD74HC242/HD74HC243
HD74HC243
1 of 4
Transceivers
A
VCC
VCC
B
GBA
GAB
4
HD74HC242/HD74HC243
DC Characteristics
Ta = –40 to
+85°C
Ta = 25°C
Item
Symbol
VCC (V) Min Typ Max Min
Max
Unit
Input voltage
VIH
2.0
1.5 —
—
1.5
—
V
4.5
3.15 —
—
3.15
—
6.0
4.2 —
—
4.2
—
2.0
—
—
0.5
—
0.5
4.5
—
—
1.35 —
1.35
6.0
—
—
1.8
—
1.8
2.0
1.9 2.0 —
1.9
—
4.5
4.4 4.5 —
4.4
—
6.0
5.9 6.0 —
5.9
—
4.5
4.18 —
—
4.13
—
I OH = –6 mA
6.0
5.68 —
—
5.63
—
I OH = –7.8 mA
2.0
—
0.0 0.1
—
0.1
4.5
—
0.0 0.1
—
0.1
6.0
—
0.0 0.1
—
0.1
4.5
—
—
0.26 —
0.33
I OL = 6 mA
6.0
—
—
0.26 —
0.33
I OL = 7.8 mA
VIL
Output voltage
VOH
VOL
Test Conditions
V
V
V
Vin = VIH or VIL I OH = –20 µA
Vin = VIH or VIL I OL = 20 µA
Off-state output
current
I OZ
6.0
—
—
±0.5 —
±5.0
µA
Vin = VIH or VIL,
Vout = VCC or GND
Input current
Iin
6.0
—
—
±0.1 —
±1.0
µA
Vin = VCC or GND
Quiescent supply
current
I CC
6.0
—
—
4.0
40
µA
Vin = VCC or GND, Iout = 0 µA
—
5
HD74HC242/HD74HC243
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = –40 to
+85°C
Ta = 25°C
VCC (V) Min Typ Max Min
Max
Unit
Propagation delay t PHL
2.0
—
—
90
—
115
ns
time
4.5
—
10
18
—
23
6.0
—
—
15
—
20
2.0
—
—
90
—
115
4.5
—
10
18
—
23
6.0
—
—
15
—
20
2.0
—
—
150 —
190
4.5
—
14
30
—
38
6.0
—
—
26
—
33
2.0
—
—
150 —
190
4.5
—
15
30
—
38
6.0
—
—
26
—
33
2.0
—
—
150 —
190
4.5
—
18
30
—
38
6.0
—
—
26
—
33
2.0
—
—
150 —
190
4.5
—
20
30
—
38
6.0
—
—
26
—
33
Item
Symbol
t PLH
Output enable
t ZL
time
t ZH
Output disable
t LZ
time
t HZ
Output rise/fall
t TLH
2.0
—
—
60
—
75
time
t THL
4.5
—
4
12
—
15
6.0
—
—
10
—
13
—
—
5
10
—
10
Input capacitance
6
Cin
ns
ns
ns
ns
ns
ns
pF
Test Conditions
HD74HC242/HD74HC243
Package Dimensions
Unit: mm
19.20
20.32 Max
8
6.30
7.40 Max
14
1.30
7
2.54 ± 0.25
0.48 ± 0.10
0.51 Min
2.39 Max
7.62
2.54 Min 5.06 Max
1
+ 0.10
0.25 – 0.05
0° – 15°
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
DP-14
Conforms
Conforms
0.97 g
Unit: mm
10.06
10.5 Max
8
5.5
14
1
0.10 ± 0.10
1.42 Max
1.27
*0.42 ± 0.08
0.40 ± 0.06
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
7
0.20
7.80 +– 0.30
1.15
0° – 8°
0.70 ± 0.20
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
FP-14DA
—
Conforms
0.23 g
7
HD74HC242/HD74HC243
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
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 failsafes, 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
Asia
Japan
:
:
:
:
http://semiconductor.hitachi.com/
http://www.hitachi-eu.com/hel/ecg
http://sicapac.hitachi-asia.com
http://www.hitachi.co.jp/Sicd/indx.htm
For further information write to:
Hitachi Semiconductor
(America) Inc.
179 East Tasman Drive,
San Jose,CA 95134
Tel: <1> (408) 433-1990
Fax: <1>(408) 433-0223
Hitachi Europe GmbH
Electronic Components Group
Dornacher Straβe 3
D-85622 Feldkirchen, Munich
Germany
Tel: <49> (89) 9 9180-0
Fax: <49> (89) 9 29 30 00
Hitachi Asia Ltd.
Hitachi Tower
16 Collyer Quay #20-00,
Singapore 049318
Tel : <65>-538-6533/538-8577
Fax : <65>-538-6933/538-3877
URL : http://www.hitachi.com.sg
Hitachi Europe Ltd.
Electronic Components Group.
Whitebrook Park
Lower Cookham Road
Maidenhead
Berkshire SL6 8YA, United Kingdom
Tel: <44> (1628) 585000
Fax: <44> (1628) 585160
Hitachi Asia Ltd.
(Taipei Branch Office)
4/F, No. 167, Tun Hwa North Road,
Hung-Kuo Building,
Taipei (105), Taiwan
Tel : <886>-(2)-2718-3666
Fax : <886>-(2)-2718-8180
Telex : 23222 HAS-TP
URL : http://www.hitachi.com.tw
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
URL : http://www.hitachi.com.hk
Copyright  Hitachi, Ltd., 2000. All rights reserved. Printed in Japan.
Colophon 2.0
8