DM54LS169J/883 National Semiconductor, DM54LS169J/883 Datasheet

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DM54LS169J/883

Manufacturer Part Number
DM54LS169J/883
Description
Manufacturer
National Semiconductor
Type
Binaryr
Datasheet

Specifications of DM54LS169J/883

Technology
Bipolar
Number Of Elements
1
Number Of Bits
4
Logic Family
LS
Logical Function
Counter
Operating Supply Voltage (typ)
5V
Propagation Delay Time
44ns
Operating Temp Range
-55C to 125C
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Operating Temperature Classification
Military
Mounting
Through Hole
Pin Count
16
Lead Free Status / RoHS Status
Not Compliant
C 1995 National Semiconductor Corporation
54LS169 DM54LS169A DM74LS169A
Synchronous 4-Bit Up Down Binary Counter
General Description
This synchronous presettable counter features an internal
carry look-ahead for cascading in high-speed counting ap-
plications Synchronous operation is provided by having all
flip-flops clocked simultaneously so that the outputs all
change at the same time when so instructed by the count-
enable inputs and internal gating This mode of operation
helps eliminate the output counting spikes that are normally
associated with asynchronous (ripple clock) counters A
buffered clock input triggers the four master-slave flip-flops
on the rising edge of the clock waveform
This counter is fully programmable that is the outputs may
each be preset either high or low The load input circuitry
allows loading with the carry-enable output of cascaded
counters As loading is synchronous setting up a low level
at the load input disables the counter and causes the out-
puts to agree with the data inputs after the next clock pulse
The carry look-ahead circuitry permits cascading counters
for n-bit synchronous applications without additional gating
Both count-enable inputs (P and T) must be low to count
The direction of the count is determined by the level of the
up down input When the input is high the counter counts
up when low it counts down Input T is fed forward to en-
able the carry outputs The carry output thus enabled will
produce a low-level output pulse with a duration approxi-
mately equal to the high portion of the Q
Connection Diagram
DM54LS169AJ DM54LS169AW DM74LS169AM or DM74LS169AN
Order Number 54LS169DMQB 54LS169FMQB 54LS169LMQB
TL F 6401
See NS Package Number E20A J16A M16A N16E or W16A
A
output when
Dual-In-Line Package
counting up and approximately equal to the low portion of
the Q
carry pulse can be used to enable successively cascaded
stages Transitions at the enable P or T inputs are allowed
regardless of the level of the clock input All inputs are diode
clamped to minimize transmission-line effects thereby sim-
plifying system design
This counter features a fully independent clock circuit
Changes at control inputs (enable P enable T load up
down) which modify the operating mode have no effect
until clocking occurs The function of the counter (whether
enabled disabled loading or counting) will be dictated
solely by the conditions meeting the stable setup and hold
times
Features
Y
Y
Y
Y
Y
Fully
programming
Internal look-ahead for fast counting
Carry output for n-bit cascading
Fully independent clock circuit
Alternate
available
Office Distributor for specifications
A
output when counting down This low-level overflow
synchronous
Contact a National Semiconductor Sales
Military Aerospace
operation
TL F 6401– 1
device
for
RRD-B30M105 Printed in U S A
counting
(54LS169)
June 1989
and
is

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DM54LS169J/883 Summary of contents

Page 1

... Y programming Internal look-ahead for fast counting Y Carry output for n-bit cascading Y Fully independent clock circuit Y Alternate Military Aerospace Y available Contact a National Semiconductor Sales Office Distributor for specifications output when A Dual-In-Line Package June 1989 operation for counting and device (54LS169 6401– 1 ...

Page 2

... Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Input Voltage Operating Free Air Temperature Range DM54LS and 54LS DM74LS Storage Temperature Range Recommended Operating Conditions Symbol ...

Page 3

Switching Characteristics Symbol Parameter f Maximum Clock MAX Frequency t Propagation Delay Time PLH Low to High Level Output t Propagation Delay Time PHL High to Low Level Output t Propagation Delay Time PLH Low to High Level Output t ...

Page 4

Logic Diagram LS169A Binary Counter 6401– 2 ...

Page 5

Timing Diagram Typical Load Count and Inhibit Sequences LS169A Binary Counters 6401 – 3 ...

Page 6

Physical Dimensions inches (millimeters) Ceramic Leadless Chip Carrier Package (E) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 54LS169DMQB or DM54LS169AJ Order Number 54LS169LMQB NS Package Number E20A NS Package Number J16A 6 ...

Page 7

Physical Dimensions inches (millimeters) (Continued) 16-Lead Small Outline Molded Package (M) 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS169AM NS Package Number M16A Order Number DM74LS169AN NS Package Number N16E 7 ...

Page 8

... Hong Kong Ltd 49) 0-180-530 85 86 13th Floor Straight Block a Ocean Centre 5 Canton Rd 49) 0-180-530 85 85 Tsimshatsui Kowloon a Tel ( 49) 0-180-532 78 32 Hong Kong a 49) 0-180-532 93 58 Tel (852) 2737-1600 a Tel ( 49) 0-180-534 16 80 Fax (852) 2736-9960 a National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 ...

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