Datasheet HD74BC574A Datasheet (HIT)

HD74BC574A

Octal D Type Flip Flops With 3 State Outputs

ADE-205-042 (Z)

Rev. 0

June 1993

Description

The HD74BC574A provides high drivability and operation equal to or better than high speed bipolar
standard logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5
of high speed bipolar logic IC, when the frequency is 10 MHz. The device has eight edge triger D type flip
flops with three state outputs in a 20 pin package. Data at the D inputs meeting set up requirements, are
transferred to the Q outputs on positive going transitions of the clock input. When the latch enable goes
low, data at the D inputs will be retained at the outputs until latch enable returns high again. When a high
logic level is applied to the output control input, all outputs go to a high impedance state, regardless of what
signals are present at the other inputs and the state of the strage elements.

Features

• Input/Output are at high impedance state when power supply is off.

• Built in input pull up circuit can make input pins be open, when not used.

• TTL level input

• Wide operating temperature range

Ta = –40 to + 85°C

HD74BC574A

Function Table

Inputs
Output Control CK D Output Q

L HH
L LL
LLXQ

HX X Z
H : High level

L : Low level
X : Immaterial
Z : High impedance

: Low to high transition
: Level of Q before the indicated steady state input conditions were established.

Q

0

Pin Arrangement

0

Output
Control

1D
2D
3D
4D
5D
6D
7D
8D

GND

1
2
3
4
5
6

7

8

9

10

(Top view)

20
19
18
17
16
15
14
13
12
11

V
1Q

2Q
3Q
4Q
5Q
6Q

7Q

8Q
CK

CC

2

HD74BC574A

Absolute Maximum Ratings

Item Symbol Rating Unit

Supply voltage V
Input diode current I
Input voltage V
Output voltage V
Off state output voltage V

CC

IK

IN

OUT

OUT(off)

Storage temperature Tstg –65 to +150 °C
Note: 1. The absolute maximum ratings are values which must not individually be exceeded, and

furthermore, no two of which may be realized at the same time.

Recommended Operating Conditions

Item Symbol Min Typ Max Unit

Supply voltage V
Input voltage V
Output voltage V

CC

IN

OUT

Operating temperature Topr –40 — 85 °C
Input rise/fall time*

1

tr, t

f

Note: 1. This item guarantees maximum limit when one input switches.

Waveform: Refer to test circuit of switching characteristics.

4.5 5.0 5.5 V
0—VCCV
0—VCCV

0 — 8 ns/V

–0.5 to +7.0 V
±30 mA
–0.5 to +7.5 V
–0.5 to +7.5 V
–0.5 to +5.5 V

3

HD74BC574A

Logic Diagram

Output
Control

1D

2D

3D

4D

8D

CK

D Q

CK

D Q

CK

D Q

CK

D Q

CK

D Q

CK

1Q

2Q

3Q

4Q

8Q

4

HD74BC574A

Electrical Characteristics (Ta = –40°C to +85°C)

Item Symbol VCC (V) Min Max Unit Test Conditions

Input voltage V

Output voltage V

IH

V

IL

OH

4.5 2.4 — V IOH = –3 mA

4.5 2.0 — V IOH = –15 mA

V

OL

4.5 — 0.4 V IOL = 24 mA

4.5 — 0.5 V IOL = 48 mA
Input diode voltage V
Input current I

IK

I

4.5 — –1.2 V IIN = –18 mA

5.5 — –250 µAV

5.5 — 1.0 µAV

5.5 — 100 µAV
Short circuit output current*1I
Off state output current I

Supply current I

OS

OZH

I

OZL

CCL

I

CCH

I

CCZ

2

I

*

CCT

5.5 –100 –225 mA VIN = 0 or 5.5 V

5.5 — 50 µAV

5.5 — –50 µAV

5.5 — 29.5 mA VIN = 0 or 5.5 V

5.5 — 2.5 mA VIN = 0 or 5.5 V

5.5 — 2.5 mA VIN = 0 or 5.5 V

5.5 — 1.5 mA VIN = 3.4 or 0.5 V
Notes: 1. Not more than one output should be shorted at a time and duration of the short circuit should not

exceed one second.

2. When input by the TTL level, it shows I

2.0 — V
— 0.8 V

increase at per one input pin.

CC

= 0 V

IN

= 5.5 V

IN

= 7.0 V

IN

= 2.7 V

O

= 0.5 V

O

All outputs is “L”

All outputs is “H”

All outputs is “Z”

5

HD74BC574A

Switching Test Method (CL = 50 pF)

Ta = 25°C
V

= 5.0 V

CC

Ta = –40 to 85°C
VCC = 5.0 V ±10%

Item Symbol Min Max Min Max Unit Test conditions

Propagation CK → Qt
delay time t
Output enable time t

t

Output disable time t

t

PLH

PHL

ZH

ZL

HZ

LZ

3.0 8.0 3.0 10.0 ns See under figure

3.0 8.0 3.0 10.0

3.0 9.0 3.0 11.0 ns

3.0 9.0 3.0 11.0

3.0 8.0 3.0 10.0 ns

3.0 8.0 3.0 10.0

Setup time ts(H) 2.0 — 2.0 — ns

ts(L) 2.0 — 2.0 —

Hold time th(H) 2.0 — 2.0 — ns

th(L) 2.0 — 2.0 —

Pulse width tW(H) 6.0 — 6.0 — ns

tW(L) 6.0 — 6.0 —
Input capacitance C
Output capacitance C

IN

O

3.0 (Typ) — — pF VIN = VCC or GND

15.0 (Typ) — pF VO = VCC or GND

Test Circuit

V

V

CC

OC

1D to 8D

CK

Pulse Generator

Z

out

= 50

Ω

Pulse Generator

Z

out

= 50

Ω

Input

Input

See Function Table

Notes: 1. CL includes probe and jig capacitance.

2. OPEN: t
7 V: tZL, t

PLH

LZ

, t

PHL

, tZH, tHZ,th, ts t

CC

1Q to 8Q

w

Output

C =

L

50 pF

50 ScopeΩ

500 Ω

450 Ω

*2
OPEN
7V

6

Waveforms-1

HD74BC574A

Input
CK

Input
D

Output
Q

Waveforms-2

t

r

90%

90%

1.5 V

10%

t

r

90%

1.5 V

t

10%

90%

f

t

10% 10%

t

PLH

1.5 V

t

r

3 V

1.5 V
0 V

f

3 V

0 V

t

PHL

V

OH

1.5 V
V

OL

t

f

Input
CK

Input
D

90% 90%

1.5 V

10%

t

sh

1.5 V

1.5 V
10%

t

w

t

1.5 V

3 V

0 V

3 V

0 V

7

HD74BC574A

Waveforms-3

Output
Control

1.5 V
10%

Waveform–A

Waveform–B

Notes: 1. tr = 2.5 ns, tf = 2.5 ns

2. Input waveform: PRR = 1 MHz, duty cycle 50%

3. Waveform-A shows input conditions such that the output is “L” level when enable by the output
control.

4. Waveform-B shows input conditions such that the output is “H” level when enable by the output
control.

t

f

t

r

90%90%

3 V

1.5 V

10%

t

ZL

t

LZ

0 V

3.5 V

1.5 V
V

+ 0.3 V

OL

t

ZH

t

HZ

V

– 0.3 V

OH

V

OL

V

OH

1.5 V

0 V

8

Package Dimensions

HD74BC574A

Unit: mm

9

Cautions

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copyright, trademark, or other intellectual property rights for information contained in this document.
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intellectual property rights, in connection with use of the information contained in this document.

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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.

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

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