74HC191 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved.
Product data sheet Rev. 3 — 3 January 2017 9 of 22
NXP Semiconductors
74HC191
Presettable synchronous 4-bit binary up/down counter
10. Dynamic characteristics
Table 8. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); C
L
= 50 pF unless otherwise specified; for test circuit see Figure 18.
Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit
Min Typ Max Min Max Min Max
t
pd
propagation
delay
CP to Qn; see Figure 10
[1]
V
CC
= 2.0 V - 72 220 - 275 - 330 ns
V
CC
= 4.5 V - 26 44 - 55 - 66 ns
V
CC
= 5.0 V; C
L
=15pF - 22 - - - - - ns
V
CC
= 6.0 V - 21 37 - 47 - 56 ns
CP to TC; see Figure 10
V
CC
= 2.0 V - 83 255 - 320 - 395 ns
V
CC
= 4.5 V - 30 51 - 64 - 77 ns
V
CC
= 6.0 V - 24 43 - 54 - 65 ns
CP to RC
; see Figure 11
V
CC
= 2.0 V - 47 150 - 190 - 225 ns
V
CC
= 4.5 V - 17 30 - 38 - 45 ns
V
CC
= 6.0 V - 14 26 - 33 - 38 ns
CE
to RC; see Figure 11
V
CC
= 2.0 V - 33 130 - 165 - 195 ns
V
CC
= 4.5 V - 12 26 - 33 - 39 ns
V
CC
= 6.0 V - 10 22 - 28 - 33 ns
Dn to Qn; see Figure 12
V
CC
= 2.0 V - 61 220 - 275 - 330 ns
V
CC
= 4.5 V - 22 44 - 55 - 66 ns
V
CC
= 6.0 V - 18 37 - 47 - 56 ns
PL
to Qn; see Figure 13
V
CC
= 2.0 V - 61 220 - 275 - 330 ns
V
CC
= 4.5 V - 22 44 - 55 - 66 ns
V
CC
= 6.0 V - 18 37 - 47 - 56 ns
U
/D to TC; see Figure 14
V
CC
= 2.0 V - 44 190 - 240 - 285 ns
V
CC
= 4.5 V - 16 38 - 48 - 57 ns
V
CC
= 6.0 V - 13 32 - 41 - 48 ns
U
/D to RC; see Figure 14
V
CC
= 2.0 V - 50 210 - 265 - 315 ns
V
CC
= 4.5 V - 18 42 - 53 - 63 ns
V
CC
= 6.0 V - 14 36 - 45 - 54 ns
t
t
transition
time
see Figure 15
[2]
V
CC
=2.0V - 19 75 - 95 - 110 ns
V
CC
=4.5V - 7 15 - 19 - 22 ns
V
CC
=6.0V - 6 13 - 16 - 19 ns