74ACT374
OCTAL D-TYPE FLIP FLOP
WITH 3 STATE OUTPUT NON INVERTING
April 1997
s
HIGH SPEED:
f
MAX
= 260 MHz (TYP.) at V
CC
= 5V
s
LOW POWER DISSIPATION:
I
CC
= 8
A (MAX.) at T
A
= 25
o
C
s
COMPATIBLE WITH TTL OUTPUTS
V
IH
= 2V (MIN), V
IL
= 0.8V (MAX)
s
50
TRANSMISSION LINE DRIVING
CAPABILITY
s
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24 mA (MIN)
s
BALANCED PROPAGATION DELAYS:
t
PLH
t
PHL
s
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 4.5V to 5.5V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 374
s
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The ACT374 is an advanced high-speed CMOS
OCTAL D-TYPE FLIP FLOP with 3 STATE
OUTPUT
NON
INVERTING
fabricated
with
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology. It is ideal for low
power
applications
mantaining
high
speed
operation similar to equivalent Bipolar Schottky
TTL.
These 8 bit D-Type flip-flops are controlled by a
clock input (CK) and an output enable input (OE).
On the positive transition of the clock, the Q
outputs will be set to logic state that were setup
at the D inputs.
While the (OE) input is low, the 8 outputs will be
in a normal logic state (high or low logic level)
and while high level the outputs will be in a high
impedance state.
The output control does not affect the internal
operation of flip flop; that is, the old data can be
retained or the new data can be entered even
while the outputs are off.
The device is designed to interface directly High
Speed CMOS system with TTL and NMOS
components.
All
inputs and
outputs
are
equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES :
74ACT374B
74ACT374M
M
(Micro Package)
B
(Plastic Package)
1/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PI N No
SYMBOL
NAME AND F UNCTIO N
1
OE
3 State Output Enable
Input (Active LOW)
2, 5, 6, 9,
12, 15, 16,
19
Q0 to Q7
3 State Outputs
3, 4, 7, 8,
13, 14, 17,
18
D0 to D7
Data Inputs
11
CLOCK
Clock Input (LOW to
HIGH, edge triggered)
10
GND
Ground (0V)
20
V
CC
Positive Supply Voltage
TRUTH TABLE
INPUT S
OUT PUT S
OE
CK
D
Q
H
X
X
Z
L
X
NO CHANGE
L
L
L
L
H
H
X: DON'T CARE
Z: HIGH IMPEDANCE
LOGIC DIAGRAMS
74ACT374
2/10
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Val ue
Uni t
V
CC
Supply Voltage
-0.5 to +7
V
V
I
DC Input Voltage
-0.5 to V
CC
+ 0.5
V
V
O
DC Output Voltage
-0.5 to V
CC
+ 0.5
V
I
IK
DC Input Diode Current
20
mA
I
OK
DC Output Diode Current
20
mA
I
O
DC Output Current
50
mA
I
CC
or I
GND
DC V
CC
or Ground Current
400
mA
T
stg
Storage Temperature
-65 to +150
o
C
T
L
Lead Temperature (10 sec)
300
o
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Valu e
Uni t
V
CC
Supply Voltage
4.5 to 5.5
V
V
I
Input Voltage
0 to V
CC
V
V
O
Output Voltage
0 to V
CC
V
T
op
Operating Temperature:
-40 to +85
o
C
dt/dv
Input Rise and Fall Time V
CC
= 4.5 to 5.5V (note 1)
8
ns/V
1) V
IN
from 0.8 V to 2.0 V
74ACT374
3/10
DC SPECIFICATIONS
Symbol
Parameter
Test Con dition s
Value
Unit
V
CC
(V)
T
A
= 25
o
C
-40 to 85
o
C
Mi n.
Typ.
Max.
Min .
Max.
V
IH
High Level Input Voltage
4.5
V
O
= 0.1 V or
V
CC
- 0.1 V
2.0
1.5
2.0
V
5.5
2.0
1.5
2.0
V
IL
Low Level Input Voltage
4.5
V
O
= 0.1 V or
V
CC
- 0.1 V
1.5
0.8
0.8
V
5.5
1.5
0.8
0.8
V
OH
High Level Output
Voltage
4.5
V
I
(*)
=
V
IH
or
V
IL
I
O
=-50
A
4.4
4.49
4.4
V
5.5
I
O
=-50
A
5.4
5.49
5.4
4.5
I
O
=-24 mA
3.86
3.76
5.5
I
O
=-24 mA
4.86
4.76
V
OL
Low Level Output
Voltage
4.5
V
I
(*)
=
V
IH
or
V
IL
I
O
=50
A
0.001
0.1
0.1
V
5.5
I
O
=50 mA
0.001
0.1
0.1
4.5
I
O
=24 mA
0.36
0.44
5.5
I
O
=24 mA
0.36
0.44
I
I
Input Leakage Current
5.5
V
I
= V
CC
or GND
0.1
1
A
I
OZ
3 State Output Leakage
Current
5.5
V
I
= V
IH
or V
IL
V
O
= V
CC
or GND
0.5
5
A
I
CCT
Max I
CC
/Input
5.5
V
I
= V
CC
-2.1 V
0.6
1.5
mA
I
CC
Quiescent Supply
Current
5.5
V
I
= V
CC
or GND
8
80
A
I
OLD
Dynamic Output Current
(note 1, 2)
5.5
V
OLD
= 1.65 V max
75
mA
I
OHD
V
OHD
= 3.85 V min
-75
mA
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50
.
(*) All outputs loaded.
74ACT374
4/10
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Test Con dition s
Value
Unit
V
CC
(V)
T
A
= 25
o
C
-40 to 85
o
C
Mi n.
Typ.
Max.
Min .
Max.
C
OUT
Output Capacitance
5.0
8
pF
C
IN
Input Capacitance
5.0
4
pF
C
PD
Power Dissipation
Capacitance (note 1)
5.0
25
pF
1) C
PD
is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to
Test Circuit). Average operating current can be obtained by the following equation. I
CC
(opr) = C
PD
V
CC
f
IN
+ I
CC
/n (per circuit)
AC ELECTRICAL CHARACTERISTICS (C
L
= 50 pF, R
L
= 500
, Input t
r
= t
f
=3 ns)
Symbol
Parameter
T est Cond iti on
Value
Unit
V
CC
(V)
T
A
= 25
o
C
-40 to 85
o
C
Mi n.
Typ.
Max.
Min .
Max.
t
PLH
t
PHL
Propagation Delay Time
CK to Q
5.0
(*)
5.0
10.0
11.0
ns
t
PZL
t
PZH
Output Enable Time
5.0
(*)
6.0
10.0
11.0
ns
t
PLZ
t
PHZ
Output Disable Time
5.0
(*)
6.5
10.0
11.0
ns
t
w
CK Pulse Width, HIGH
or LOW
5.0
(*)
1.5
5.0
5.0
ns
t
s
Setup Time Q to CK
HIGH or LOW
5.0
(*)
0.5
5.0
5.0
ns
t
h
Hold Time Q to CK
HIGH or LOW
5.0
(*)
-0.5
2.0
2.0
ns
f
MAX
Maximim Clock
Frequency
5.0
(*)
100
260
85
MHz
(*) Voltage range is 5V
0.5V
74ACT374
5/10
TEST
SWI TCH
t
PLH
, t
PHL
Open
t
PZL
, t
PLZ
2V
CC
t
PZH
, t
PHZ
Open
C
L
= 50 pF or equivalent (includes jig and probe capacitance)
R
L
= R
1
= 500
or equivalent
R
T
= Z
OUT
of pulse generator (typically 50
)
WAVEFORM 1: PROPAGATION DELAYS, SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)
TEST CIRCUIT
74ACT374
6/10
WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIMES (f=1MHz; 50% duty cycle)
WAVEFORM 3: PULSE WIDTH
74ACT374
7/10
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
a1
0.254
0.010
B
1.39
1.65
0.055
0.065
b
0.45
0.018
b1
0.25
0.010
D
25.4
1.000
E
8.5
0.335
e
2.54
0.100
e3
22.86
0.900
F
7.1
0.280
I
3.93
0.155
L
3.3
0.130
Z
1.34
0.053
P001J
Plastic DIP20 (0.25) MECHANICAL DATA
74ACT374
8/10
SO20 MECHANICAL DATA
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
2.65
0.104
a1
0.10
0.20
0.004
0.007
a2
2.45
0.096
b
0.35
0.49
0.013
0.019
b1
0.23
0.32
0.009
0.012
C
0.50
0.020
c1
45
(typ.)
D
12.60
13.00
0.496
0.512
E
10.00
10.65
0.393
0.419
e
1.27
0.050
e3
11.43
0.450
F
7.40
7.60
0.291
0.299
L
0.50
1.27
0.19
0.050
M
0.75
0.029
S
8
(max.)
P013L
74ACT374
9/10
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
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.
74ACT374
10/10
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