5-348

FAST AND LS TTL DATA

SN54/74LS190

• SN54/74LS191

AC WAVEFORMS

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

1.3 V

tPHL

tPHL

tPHL

tPHL

tPHL

tPLH

tPLH

tPLH

tPLH

tPLH

1/f MAX

tW

CP

Q OR TC

Pn

Qn

CP

Q

TC

PL

RC

U/D

Pn

PL

Qn

Pn

PL

Qn

ts(H)

ts(L)

th(H)

th(L)

th(L)

th(H)

ts(H)

ts(L)

CP

CE

RC

CP OR CE

NOTE: PL = LOW

* The shaded areas indicate when the input is permitted

tPLH

tPHL

CHANGE

CE MAY

CE MAY

CHANGE

(HL)

only

tW

tW

trec

Q = P

Q = P