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SN54-74LS168

Description
BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
File Size75KB，6 Pages
ManufacturerON Semiconductor
Websitehttp://www.onsemi.cn
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SN54-74LS168 Overview

BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS

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BCD DECADE/MODULO
16 BINARY SYNCHRONOUS
BI-DIRECTIONAL COUNTERS
The SN54 / 74LS168 and SN54 / 74LS169 are fully synchronous 4-stage
up/down counters featuring a preset capability for programmable operation,
carry lookahead for easy cascading and a U / D input to control the direction
of counting. The SN54 / 74LS168 counts in a BCD decade (8, 4, 2, 1)
sequence, while the SN54 / 74LS169 operates in a Modulo 16 binary
sequence. All state changes, whether in counting or parallel loading, are
initiated by the LOW-to-HIGH transition of the clock.
SN54/74LS168
SN54/74LS169
BCD DECADE / MODULO
16 BINARY SYNCHRONOUS
BI-DIRECTIONAL COUNTERS
LOW POWER SCHOTTKY
•
•
•
•
•
•
•
Low Power Dissipation 100 mW Typical
High-Speed Count Frequency 30 MHz Typical
Fully Synchronous Operation
Full Carry Lookahead for Easy Cascading
Single Up / Down Control Input
Positive Edge-Trigger Operation
Input Clamp Diodes Limit High-Speed Termination Effects
J SUFFIX
CERAMIC
CASE 620-09
16
1
CONNECTION DIAGRAM DIP
(TOP VIEW)
VCC
16
TC
15
Q0
14
Q1
13
Q2
12
Q3
11
CET
10
PE
9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
1
U/D
2
CP
3
P0
4
P1
5
P2
6
P3
8
7
CEP GND
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
PIN NAMES
LOADING
(Note a)
HIGH
LOW
0.25 U.L.
0.5 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
0.25 U.L.
5 (2.5) U.L.
5 (2.5) U.L.
CEP
CET
CP
PE
U/D
P0–P3
Q0–Q3
TC
Count Enable Parallel (Active LOW) Input
Count Enable Trickle (Active LOW) Input
Clock Pulse (Active positive going edge) Input
Parallel Enable (Active LOW) Input
Up-Down Count Control Input
Parallel Data Inputs
Flip-Flop Outputs
Terminal Count (Active LOW) Output
0.5 U.L.
1.0 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
0.5 U.L.
10 U.L.
10 U.L.
LOGIC SYMBOL
9
3
4
5
6
NOTES:
a. 1 TTL Unit Load (U.L.) = 40
µA
HIGH/1.6 mA LOW.
b. The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74)
b.
Temperature Ranges.
1
7
10
2
PE P0 P1 P2 P3
U/D
CEP
TC
CET
CP
Q0 Q1 Q2 Q3
15
14 13 12 11
VCC = PIN 16
GND = PIN 8
FAST AND LS TTL DATA
5-1

SN54-74LS168 Related Products

SN54-74LS168 74LS168 SN74LS169N SN74LS169D SN74LS168D SN74LS168N SN54LS169J SN54LS168J
Description BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS
Is it Rohs certified? - - incompatible incompatible incompatible incompatible incompatible incompatible
Maker - - ON Semiconductor - ON Semiconductor ON Semiconductor ON Semiconductor ON Semiconductor
Parts packaging code - - DIP SOIC SOIC DIP DIP DIP
package instruction - - PLASTIC, DIP-16 SOP, SOP16,.25 SOIC-16 PLASTIC, DIP-16 DIP, DIP16,.3 CERAMIC, DIP-16
Contacts - - 16 16 16 16 16 16
Reach Compliance Code - - not_compliant _compli not_compliant not_compliant _compli _compli
Counting direction - - BIDIRECTIONAL BIDIRECTIONAL BIDIRECTIONAL BIDIRECTIONAL BIDIRECTIONAL BIDIRECTIONAL
series - - LS LS LS LS LS LS
JESD-30 code - - R-PDIP-T16 R-PDSO-G16 R-PDSO-G16 R-PDIP-T16 R-GDIP-T16 R-GDIP-T16
JESD-609 code - - e0 e0 e0 e0 e0 e0
length - - 19.175 mm 9.9 mm 9.9 mm 19.175 mm 19.3 mm 19.49 mm
Load/preset input - - YES YES YES YES YES YES
Logic integrated circuit type - - BINARY COUNTER BINARY COUNTER DECADE COUNTER DECADE COUNTER BINARY COUNTER DECADE COUNTER
MaximumI(ol) - - 0.008 A 0.008 A 0.008 A 0.008 A 0.004 A 0.004 A
Operating mode - - SYNCHRONOUS SYNCHRONOUS SYNCHRONOUS SYNCHRONOUS SYNCHRONOUS SYNCHRONOUS
Number of digits - - 4 4 4 4 4 4
Number of functions - - 1 1 1 1 1 1
Number of terminals - - 16 16 16 16 16 16
Maximum operating temperature - - 70 °C 70 °C 70 °C 70 °C 125 °C 125 °C
Package body material - - PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY CERAMIC, GLASS-SEALED CERAMIC, GLASS-SEALED
encapsulated code - - DIP SOP SOP DIP DIP DIP
Encapsulate equivalent code - - DIP16,.3 SOP16,.25 SOP16,.25 DIP16,.3 DIP16,.3 DIP16,.3
Package shape - - RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR
Package form - - IN-LINE SMALL OUTLINE SMALL OUTLINE IN-LINE IN-LINE IN-LINE
Peak Reflow Temperature (Celsius) - - NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
power supply - - 5 V 5 V 5 V 5 V 5 V 5 V
Maximum supply current (ICC) - - 34 mA 34 mA 34 mA 34 mA 34 mA 34 mA
propagation delay (tpd) - - 23 ns 23 ns 23 ns 23 ns 23 ns 23 ns
Certification status - - Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified Not Qualified
Maximum seat height - - 4.44 mm 1.75 mm 1.75 mm 4.44 mm 4.19 mm 5.08 mm
Maximum supply voltage (Vsup) - - 5.25 V 5.25 V 5.25 V 5.25 V 5.5 V 5.5 V
Minimum supply voltage (Vsup) - - 4.75 V 4.75 V 4.75 V 4.75 V 4.5 V 4.5 V
Nominal supply voltage (Vsup) - - 5 V 5 V 5 V 5 V 5 V 5 V
surface mount - - NO YES YES NO NO NO
technology - - TTL TTL TTL TTL TTL TTL
Temperature level - - COMMERCIAL COMMERCIAL COMMERCIAL COMMERCIAL MILITARY MILITARY
Terminal surface - - Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form - - THROUGH-HOLE GULL WING GULL WING THROUGH-HOLE THROUGH-HOLE THROUGH-HOLE
Terminal pitch - - 2.54 mm 1.27 mm 1.27 mm 2.54 mm 2.54 mm 2.54 mm
Terminal location - - DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature - - NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Trigger type - - POSITIVE EDGE POSITIVE EDGE POSITIVE EDGE POSITIVE EDGE POSITIVE EDGE POSITIVE EDGE
width - - 7.62 mm 3.9 mm 3.9 mm 7.62 mm 7.62 mm 7.62 mm
minfmax - - 25 MHz 25 MHz 25 MHz 25 MHz 25 MHz 25 MHz

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