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DM74LS191N

P1-P3P4-P6
www.fairchildsemi.com 4
DM74LS191
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
Note 2: T
A
= 25°C and V
CC
= 5V.
DC Electrical Characteristics
Note 3: All typicals are at V
CC
= 5V, T
A
= 25°C.
Note 4: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 5: I
CC
is measured with all inputs grounded and all outputs open.
Storage Temperature Range −65°C to +150°C
Input Voltage 7V
Operating Free Air Temp. Range 0°C to +70°C
Supply Voltage 7V
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
I
OH
HIGH Level Output Current −0.4 mA
I
OL
LOW Level Output Current 8 mA
f
CLK
Clock Frequency (Note 2) 0 20 MHz
t
W
Pulse Width Clock 25 ns
(Note 2) Load 35
t
SU
Data Setup Time (Note 2) 20 ns
t
H
Data Hold Time (Note 2) 0 ns
t
EN
Enable Time to Clock (Note 2) 30 ns
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min Typ Max Units
(Note 3)
V
I
Input Clamp Voltage V
CC
= Min, I
I
= − 18 mA −1.5 V
V
OH
HIGH Level Output V
CC
= Min, I
OH
= Max Mil 2.5 3.4
Voltage V
IL
= Max, V
IH
= Min Com 2.7 3.4 V
V
OL
LOW Level Output V
CC
= Min, I
OL
= Max 0.25 0.4
Voltage V
IL
= Max, V
IH
= Min 0.35 0.5 V
I
OL
= 4 mA, V
CC
= Min 0.25 0.4
I
I
Input Current @ Max V
CC
= Max Enable 0.3 mA
Input Voltage V
I
= 7V Others 0.1
I
IH
HIGH Level Input V
CC
= Max Enable 60 µA
Current V
I
= 2.7V Others 20
I
IL
LOW Level Input V
CC
= Max Enable −1.08 mA
Current V
I
= 0.4V Others −0.4
I
OS
Short Circuit V
CC
= Max Mil −20 −100 mA
Output Current (Note 4) Com −20 −100
I
CC
Supply Current V
CC
= Max (Note 5) 20 35 mA
5 www.fairchildsemi.com
DM74LS191
AC Electrical Characteristics
From (Input)
R
L
= 2 kΩ
Symbol Parameter
To (Output)
C
L
= 15 pF C
L
= 50 pF Units
Min Max Min Max
f
MAX
Maximum Clock 20 20 MHz
Frequency
t
PLH
Propagation Delay Time Load to 33 43 ns
LOW-to-HIGH Level Output Any Q
t
PHL
Propagation Delay Time Load to 50 59 ns
HIGH-to-LOW Level Output Any Q
t
PLH
Propagation Delay Time Data to 22 26 ns
LOW-to-HIGH Level Output Any Q
t
PHL
Propagation Delay Time Data to 50 62 ns
HIGH-to-LOW Level Output Any Q
t
PLH
Propagation Delay Time Clock to 20 24 ns
LOW-to-HIGH Level Output Ripple Clock
t
PHL
Propagation Delay Time Clock to 24 33 ns
HIGH-to-LOW Level Output Ripple Clock
t
PLH
Propagation Delay Time Clock to 24 29 ns
LOW-to-HIGH Level Output Any Q
t
PHL
Propagation Delay Time Clock to 36 45 ns
HIGH-to-LOW Level Output Any Q
t
PLH
Propagation Delay Time Clock to 42 47 ns
LOW-to-HIGH Level Output Max/Min
t
PHL
Propagation Delay Time Clock to 52 65 ns
HIGH-to-LOW Level Output Max/Min
t
PLH
Propagation Delay Time Up/Down to 45 50 ns
LOW-to-HIGH Level Output Ripple Clock
t
PHL
Propagation Delay Time Up/Down to 45 54 ns
HIGH-to-LOW Level Output Ripple Clock
t
PLH
Propagation Delay Time Down/Up to 33 36 ns
LOW-to-HIGH Level Output Max/Min
t
PHL
Propagation Delay Time Down/Up to 33 42 ns
HIGH-to-LOW Level Output Max/Min
t
PLH
Propagation Delay Time Enable to 33 36 ns
LOW-to-HIGH Level Output Ripple Clock
t
PHL
Propagation Delay Time Enable to 33 42 ns
HIGH-to-LOW Level Output Ripple Clock
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
DM74LS191 Synchronous 4-Bit Up/Down Counter with Mode Control
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS012, 0.150” Narrow Body
Package Number M16A
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 300” Wide
Package Number N16E
P1-P3P4-P6

DM74LS191N

Mfr. #:
Buy DM74LS191N
Manufacturer:
ON Semiconductor / Fairchild
Description:
Counter ICs Syn 4-Bit Counter
Lifecycle:
New from this manufacturer.
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