SN54LS190 Просмотр технического описания (PDF) - Motorola => Freescale

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производитель

SN54LS190

PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS

Motorola => Freescale 

SN54/74LS190 • SN54/74LS191

AC WAVEFORMS

CP

1.3 V

Q OR TC

1/f MAX

tW

tPHL

1.3 V

tPLH

1.3 V

1.3 V

Figure 1

CP OR CE

RC

1.3 V

tPHL

1.3 V

Figure 2

1.3 V

tPLH

1.3 V

Pn

tPHL

Qn

1.3 V

1.3 V

1.3 V

tPLH

NOTE: PL = LOW

Figure 3

PL

CP

1.3 V

tW

trec

1.3 V

Q

Figure 5

U/D

tPLH

TC

tPHL

RC

1.3 V

1.3 V

1.3 V

Figure 7

tPHL

1.3 V

tPLH

1.3 V

Pn

PL 1.3 V

tPLH

Qn

tW

1.3 V

Figure 4

tPHL

Pn

1.3 V

1.3 V

ts(H)

PL

th(H)

1.3 V

ts(L)

th(L)

1.3 V

Qn

Q=P

Q=P

* The shaded areas indicate when the input is permitted

* to change for predictable output performance

Figure 6

CP

CE

1.3 V

CE MAY

CHANGE

ts(L)

(HĆL)

only

th(L)

1.3 V

CE MAY

CHANGE

th(H)

ts(H)

1.3 V

Figure 8

FAST AND LS TTL DATA

5-348

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