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74LS534N

Part # 74LS534N
Description
Category IC
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SIGNETICS
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

© 2000 Fairchild Semiconductor Corporation DS009812 www.fairchildsemi.com
March 1989
Revised March 2000
DM74LS534 Octal D-Type Flip-Flop with 3-STATE Outputs
DM74LS534
Octal D-Type Flip-Flop with 3-STATE Outputs
General Description
The DM74LS534 is a high speed, low power octal D-type
flip-flop featuring separate D-type inputs for each flip-flop
and 3-STATE outputs for bus oriented applications. A buff-
ered Clock (CP) and Output Enable (OE
) is common to all
flip-flops. The DM74LS534 is the same as the DM74LS374
except that the outputs are inverted.
Ordering Code:
Logic Symbol
V
CC
= Pin 20
GND = Pin 10
Pin Descriptions
Connection Diagram
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
= LOW-to-HIGH Clock (CP) transistion
Order Number Package Number Package Description
DM74LS534N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Pin Name Description
D0–D7 Data Inputs
CP Clock Pulse Input (Active Rising Edge)
OE
3-STATE Output Enable Input (Active LOW)
O
0–O7 Complementary 3-STATE Outputs
Inputs Outputs
D
n
CP OE
O
n
H LL
L
LH
XXHZ
www.fairchildsemi.com 2
DM74LS534
Functional Description
The DM74LS534 consists of eight edge-triggered flip-flops
with individual D-type inputs and 3-STATE true outputs.
The buffered clock and buffered Output Enable are com-
mon to all flip-flops. The eight flip-flops will store the state
of their individual D inputs that meet the setup and hold
times requirements on the LOW-to-HIGH Clock (CP) tran-
sistion. With the Output Enable (OE
) LOW, the contents of
the eight flip-flops are available at the outputs. When the
OE
is HIGH, the outputs go to the high impedance state.
Operation of the OE
input does not affect the state of the
flip-flops.
Logic Diagram
3 www.fairchildsemi.com
DM74LS534
Absolute Maximum Ratings(Note 1)
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Note 2: All typicals are at V
CC
= 5V, T
A
= 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: I
CC
is measured with the DATA inputs grounded and the OUTPUT CONTROLS at 4.5V.
Supply Voltage 7V
Input Voltage 7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range 65°C to +150°C
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.75 5 5.25 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
V
OH
HIGH Level Output Current 2.6 mA
I
OL
LOW Level Output Current 24 mA
T
A
Free Air Operating Temperature 0 70 °C
t
S
(H) Setup Time HIGH or LOW 20
ns
t
S
(L) D
n
to CP 20
t
H
(H) Hold Time HIGH or LOW 0
ns
t
H
(L) D
n
to CP 0
t
W
(H) CP Pulse Width HIGH or LOW 15
ns
t
W
(L) 15
Symbol Parameter Conditions Min
Typ
Max Units
(Note 2)
V
I
Input Clamp Voltage V
CC
= Min, I
I
= 18 mA 1.5 V
V
OH
HIGH Level V
CC
= Min, I
OH
= Max
2.4 3.3 V
Output Voltage V
IL
= Max V
IH
= Min
V
OL
LOW Level V
CC
= Min, I
OL
= Max
0.35 0.5
Output Voltage V
IL
= Max, V
IH
= Min V
I
OL
= 12 mA, V
CC
= Min 0.25 0.4
I
I
Input Current @ Max Input Voltage V
CC
= Max, V
I
= 7V 0.1 mA
I
IH
HIGH Level Input Current V
CC
= Max, V
I
= 2.7V 20 µA
I
IL
LOW Level Input Current V
CC
= Max, V
I
= 0.5V 400 µA
I
OZH
Off-State Output Current with V
CC
= Max, V
O
= 2.4V
20 µA
HIGH Level Output Voltage Applied V
IH
= Min, V
IL
= Max
I
OZL
Off-State Output Current with V
CC
= Max, V
O
= 0.4V
20 µA
LOW Level Output Voltage Applied V
IH
= Min, V
IL
= Max
I
OS
Short Circuit Output Current V
CC
= Max (Note 3) 20 100 mA
I
CC
Supply Current V
CC
= Max (Note 4) 45 mA
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