HD74BC563A
Octal D Type Transparent Latches With 3 State Outputs
ADE-205-040 (Z)
1st. Edition
Feb. 1994
Description
HD74BC563A 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 D type latches with three state
outputs in a 20 pin package. When the latch enable input is high, the
Q
outputs will follow the D inputs.
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 storage
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.
Function Table
Output Control
L
L
L
H
H
L
X
Z
Q
0
:
:
:
:
:
Latch Enable
H
H
L
X
Data
H
L
X
X
Output
Q
L
H
Q
0
Z
High level
Low level
Immaterial
High impedance
Level of
Q
before the indicated steady state input conditions were established.
HD74BC563A
Pin Arrangement
Output
Control
1D
2D
3D
4D
5D
6D
7D
8D
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
Latch
Enable
(Top view)
Absolute Maximum Ratings
Item
Supply voltage
Input diode current
Input voltage
Output voltage
Off state output voltage
Storage temperature
Note:
Symbol
V
CC
I
IK
V
IN
V
OUT
V
OUT(off)
Tstg
Rating
–0.5 to +7.0
±30
–0.5 to +7.5
–0.5 to +7.5
–0.5 to +5.5
–65 to +150
Unit
V
mA
V
V
V
°C
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.
2
HD74BC563A
Recommended Operating Conditions
Item
Supply voltage
Input voltage
Output voltage
Operating temperature
Input rise/fall time*
1
Note:
Symbol
V
CC
V
IN
V
OUT
Topr
t
r
, t
f
Min
4.5
0
0
–40
0
Typ
5.0
—
—
—
—
Max
5.5
V
CC
V
CC
85
8
Unit
V
V
V
°C
ns/V
1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Logic Diagram
Output
Control
1D
D Q
CK
1Q
2D
D Q
CK
2Q
7D
D Q
CK
7Q
8D
Latch
Enable
D Q
CK
8Q
3
HD74BC563A
Electrical Characteristics
(Ta = –40°C to +85°C)
Item
Input voltage
Symbol
V
IH
V
IL
Output voltage
V
OH
4.5
4.5
V
OL
4.5
4.5
Input diode voltage
Input current
V
IK
I
I
4.5
5.5
5.5
5.5
Short circuit output current*
1
Off state output current
I
OS
I
OZH
I
OZL
Supply current
I
CCL
I
CCH
I
CCZ
I
CCT
*
2
5.5
5.5
5.5
5.5
5.5
5.5
5.5
V
CC
(V)
Min
2.0
—
2.4
2.0
—
—
—
—
—
—
–100
—
—
—
—
—
—
Max
—
0.8
—
—
0.4
0.5
–1.2
–250
1.0
100
–225
50
–50
29.5
2.5
2.5
1.5
Unit
V
V
V
V
V
V
V
µA
µA
µA
mA
µA
µA
mA
mA
mA
mA
I
OH
= –3 mA
I
OH
= –15 mA
I
OL
= 24 mA
I
OL
= 48 mA
I
IN
= –18 mA
V
IN
= 0 V
V
IN
= 5.5 V
V
IN
= 7.0 V
V
IN
= 0 or 5.5 V
V
O
= 2.7 V
V
O
= 0.5 V
V
IN
= 0 or 5.5 V
All outputs is “L”
V
IN
= 0 or 5.5 V
All outputs is “H”
V
IN
= 0 or 5.5 V
All outputs is “Z”
V
IN
= 3.4 or 0.5 V
Test Conditions
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
CC
increase at per one input pin.
4
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