HD74AC74 [HITACHI]
Dual D-Type Positive Edge-Triggered Flip-Flop; 双D型正边沿触发触发器
| 型号： | HD74AC74 |
| 厂家： | 
HITACHI SEMICONDUCTOR |
| 描述： | Dual D-Type Positive Edge-Triggered Flip-Flop |
| 文件： | 总10页 (文件大小：63K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HD74AC74
Dual D-Type Positive Edge-Triggered Flip-Flop
Description
The HD74AC74 is a dual D-type flip-flop with Asynchronous Clear and Set inputs and complementary (Q,
Q) outputs. Information at the input is transferred to the outputs on the positive edge of the clock pulse.
Clock triggering occurs at a voltage level of the clock pulse and is not directly related to the transition time
of the positive-going pulse. After the Clock Pulse input threshold voltage has been passed, the Data input
is locked out and information present will not be transferred to the outputs until the next rising edge of the
Clock Pulse input.
Features
Asynchronous Inputs:
Low input to SD (Set) sets Q to High level
Low input to CD (Clear) sets Q to Low level
Clear and Set are independent of clock
Simultaneous Low on CD and SD makes both Q and Q High
•
Outputs Source/Sink 24 mA
HD74AC74
Pin Arrangement
CD1
D1
1
2
3
4
5
6
14 VCC
13 CD2
12 D2
CP1 D1
SD1
CD1
CP1
SD1
Q1
Q1 Q1
11 CP2
10 SD2
D2
CP2
CD2 SD2
Q2 Q2
Q1
9
8
Q2
GND 7
Q2
(Top view)
Logic Symbol
SD1
SD2
D1
Q1
Q1
D2
Q2
CP1
CP2
Q2
CD1
CD2
Pin Names
D1, D2
Data Inputs
CP1, CP2
CD1, CD2
SD1, SD2
Clock Pulse Inputs
Direct Clear Inputs
Direct Set Inputs
Q1, Q1, Q2, Q2 Outputs
2
HD74AC74
Truth Table (Each Half)
Inputs
Outputs
SD
L
CD
H
L
CP
X
D
X
X
X
H
L
Q
H
L
Q
L
H
L
X
H
H
L
L
X
H
H
L
H
H
H
H
H
H
H
Q0
L
X
Q0
H
L
:
:
:
High Voltage Level
Low Voltage Level
Immaterial
X
:
Low-to-High Clock Transition
Q0 (Q0) : Previous Q (Q) before Low-to-High Transition of Clock
Logic Diagram
SD
D
Q
CP
Q
CD
Please note that this diagram is provised only for the understanding of logic operations and should not be
used to estimate propagation delays.
DC Characteristics (unless otherwise specified)
Item
Symbol Max
Unit
Condition
Maximum quiescent supply current
ICC
40
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = Worst case
Maximum quiescent supply current
ICC
4.0
µA
VIN = VCC or ground, VCC = 5.5 V,
Ta = 25°C
3
HD74AC74
AC Characteristics
Ta = +25°C
Ta = –40°C to +85°C
CL = 50 pF
CL = 50 pF
Item
Symbol VCC (V)*1
Min
100
140
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Typ
Max
—
Min
95
Max
—
Unit
Maximum clock
frequency
fmax
tPLH
tPHL
tPLH
tPHL
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
125
160
8.0
6.0
10.5
8.0
8.0
6.0
8.0
6.0
MHz
—
125
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
—
Propagation delay
12.0
9.0
13.0
10.0
13.5
10.5
16.0
10.5
14.5
10.5
ns
ns
ns
ns
C
Dn or SDn to Qn or Qn
Propagation delay
Dn or SDn to Qn or Qn
12.0
9.5
C
Propagation delay
CPn to Qn or Qn
Propagation delay
CPn to Qn or Qn
13.5
10.0
14.0
10.0
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
AC Operating Requirements: HD74AC74
Ta = –40°C
to +85°C
Ta = +25°C
CL = 50 pF
CL = 50 pF
Item
Symbol VCC (V)*1 Typ
Guaranteed Minimum
Unit
Set-up time, HIGH or LOW
Dn to CPn
tsu
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
1.5
4.0
3.0
0
4.5
3.0
0
ns
ns
ns
ns
1.0
Hold time, HIGH or LOW
Dn to CPn
th
–2.0
–1.5
3.0
0
0
CPn or CDn or SDn
Pulse width
tw
5.5
4.5
0
7.0
5.0
0
2.5
Recovery time
trec
–2.5
–2.0
C
Dn or SDn to CP
0
0
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
4
HD74AC74
Capacitance
Item
Symbol
CIN
Typ
4.5
Unit
pF
Condition
Input capacitance
Power dissipation capacitance
VCC = 5.5 V
VCC = 5.0 V
CPD
35.0
pF
5
Unit: mm
19.20
20.32 Max
14
1
8
7
1.30
2.39 Max
7.62
+ 0.10
– 0.05
0.25
2.54 ± 0.25
0.48 ± 0.10
0° – 15°
Hitachi Code
DP-14
JEDEC
EIAJ
Conforms
Conforms
Weight (reference value) 0.97 g
Unit: mm
10.06
10.5 Max
8
14
1
7
+ 0.20
7.80
– 0.30
1.42 Max
1.15
0° – 8°
1.27
0.70 ± 0.20
*0.42 ± 0.08
0.40 ± 0.06
0.15
M
0.12
Hitachi Code
JEDEC
FP-14DA
—
EIAJ
Conforms
*Dimension including the plating thickness
Base material dimension
Weight (reference value) 0.23 g
Unit: mm
8.65
9.05 Max
8
14
1
7
+ 0.10
6.10
– 0.30
0.635 Max
1.08
0° – 8°
+ 0.67
1.27
*0.40 ± 0.06
0.60
– 0.20
0.15
M
0.25
Hitachi Code
JEDEC
EIAJ
FP-14DN
Conforms
Conforms
*Pd plating
Weight (reference value) 0.13 g
Unit: mm
5.00
5.30 Max
14
8
1
7
0.65
1.0
+0.08
*0.22
–0.07
0.13 M
0.20 ± 0.06
6.40 ± 0.20
0.83 Max
0° – 8°
0.50 ± 0.10
0.10
Hitachi Code
JEDEC
EIAJ
TTP-14D
—
—
*Dimension including the plating thickness
Base material dimension
Weight (reference value) 0.05 g
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 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
Hitachi Asia Pte. Ltd.
16 Collyer Quay #20-00
Hitachi Tower
Singapore 049318
Tel: 535-2100
Electronic components Group
Dornacher Stra§e 3
D-85622 Feldkirchen, Munich
Germany
Tel: <49> (89) 9 9180-0
Fax: <49> (89) 9 29 30 00
179 East Tasman Drive,
San Jose,CA 95134
Tel: <1> (408) 433-1990
Fax: <1>(408) 433-0223
Fax: 535-1533
Hitachi Asia Ltd.
Taipei Branch Office
3F, Hung Kuo Building. No.167,
Tun-Hwa North Road, Taipei (105)
Tel: <886> (2) 2718-3666
Fax: <886> (2) 2718-8180
Telex: 40815 HITEC HX
Hitachi Europe Ltd.
Electronic Components Group.
Whitebrook Park
Lower Cookham Road
Maidenhead
Berkshire SL6 8YA, United Kingdom
Tel: <44> (1628) 585000
Fax: <44> (1628) 778322
Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.
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