Datasheet

74HC_HCT594_3 © NXP B.V. 2006. All rights reserved.
Product data sheet Rev. 03 — 20 December 2006 19 of 26
NXP Semiconductors
74HC594; 74HCT594
8-bit shift register with output register
Measurement points are given in Table 10.
t
PLH
and t
PHL
are the same as t
pd
.
Fig 13. The shift reset (SHR) pulse width, the shift reset to output (Q7S) propagation delay
and the shift reset to shift clock (SHCP) recovery time
Measurement points are given in Table 10.
t
PLH
and t
PHL
are the same as t
pd
.
Fig 14. The storage reset (STR) pulse width, the storage reset to output (Qn) propagation
delay and the storage reset to storage clock (STCP) recovery time
Table 10. Measurement points
Type Input Output
V
M
V
M
74HC594 0.5 × V
CC
0.5 × V
CC
74HCT594 1.3 V 1.3 V
mbc324
V
M
t
PHL
V
M
t
rec
t
W
V
M
SHCP input
Q7S output
SHR input
mbc325
V
M
t
PHL
V
M
t
rec
t
W
V
M
STCP input
Qn outputs
STR input