SN54LS168J datasheet(6/6 Pages) ONSEMI

Part #	SN54LS168J

Description	BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS

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FAST AND LS TTL DATA

SN54/74LS168

• SN54/74LS169

AC WAVEFORMS

Figure 1. Clock to Output Delays,

Count Frequency, and Clock Pulse Width

Figure 2. Count Enable Trickle Input

To Terminal Count Output Delays

Figure 3. Clock to Terminal Delays

Figure 4. Setup Time (ts) and Hold (th)

for Parallel Data Inputs

1.3 V

CP

Q OR TC

tPHL

tPLH

tPHL

CET

TC

1/fmax

tW

1.3 V

ts(H)

ts(L)

th(L) = 0

th(H) = 0

Q0 • Q1 • Q2 • Q3

CP

TC

tPLH

tPHL

1.3 V

P0 • P1 • P2 • P3

1.3 V

SR OR PE

CP

U/D

TC

ts(L)

ts(H)

th(L) = 0

th(H) = 0

ts(H)

th(H) = 0

th(L) = 0

ts(H)

ts(L)

tPLH

tPHL

1.3 V

ts(L)

th(L) = 0

th(H) = 0

Figure 5. Setup Time and Hold Time for

Count Enable and Parallel Enable Inputs,

and Up-Down Control Inputs

Figure 6. Up-Down Input to

Terminal Count Output Delays

The shaded areas indicate when the

input is permitted to change for

predictable output performance.

CP

CEP

CET

CP

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Manufacturer	Part #	Datasheet	Description
Motorola, Inc	SN54LS168J	272Kb / 8P	BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS

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Manufacturer	Part #	Datasheet	Description
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ON Semiconductor	SN54-74LS160A	79Kb / 6P	BCD DECADE COUNTERS/ 4-BIT BINARY COUNTERS
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SN54LS168J Datasheet(PDF) 6 Page - ON Semiconductor

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