Datasheet

74HC_HCT299_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 28 July 2008 10 of 24
NXP Semiconductors
74HC299; 74HCT299
8-bit universal shift register; 3-state
∑(C
L
× V
CC
2
× f
o
) = sum of outputs.
C
L
= output load capacitance in pF;
V
CC
= supply voltage in V;
V
I
= GND to V
CC
for 74HC299;
V
I
= GND to (V
CC
− 1.5 V) for 74HCT299.
10. Dynamic characteristics
Table 7. Dynamic characteristics
GND (ground = 0 V); for test circuit, see Figure 11.
Symbol Parameter Conditions 25 °C −40 °C to
+85 °C
−40 °C to
+125 °C
Unit
Min Typ Max Min Max Min Max
74HC299
t
pd
propagation
delay
CP to Q0, Q7; see Figure 7
[1]
V
CC
= 2.0 V - 66 200 - 250 - 300 ns
V
CC
= 4.5 V - 24 40 - 50 - 60 ns
V
CC
= 5.0 V; C
L
= 15 pF -20-----ns
V
CC
= 6.0 V - 19 34 - 43 - 51 ns
CP to I/On; see
Figure 7
V
CC
= 2.0 V - 66 200 - 250 - 300 ns
V
CC
= 4.5 V - 24 40 - 50 - 60 ns
V
CC
= 5.0 V; C
L
= 15 pF -20-----ns
V
CC
= 6.0 V - 19 34 - 43 - 51 ns
MR to Q0, Q7 or I/On;
see
Figure 8
[2]
V
CC
= 2.0 V - 66 200 - 250 - 300 ns
V
CC
= 4.5 V - 24 40 - 50 - 60 ns
V
CC
= 5.0 V; C
L
= 15 pF -20-----ns
V
CC
= 6.0 V - 19 34 - 43 - 51 ns
t
t
transition time bus driver (I/On); see Figure 7
[3]
V
CC
= 2.0 V - 14 60 - 75 - 90 ns
V
CC
= 4.5 V - 5 12 - 15 - 18 ns
V
CC
= 6.0 V - 4 10 - 13 - 15 ns
standard (Q0, Q7); see
Figure 7
V
CC
= 2.0 V - 19 75 - 95 - 110 ns
V
CC
= 4.5 V - 7 15 - 19 - 22 ns
V
CC
= 6.0 V - 6 13 - 16 - 19 ns