HD74CBT1G126

Rev.1.00 Apr 07, 2006 page 4 of 6
Switching Characteristics

(Ta = −40 to 85°C)

VCC = 4.0 V

Item Symbol Min Max Unit Test conditions
FROM
(Input) TO
(Output)
Propagation delay time *1 tPLH
tPHL
0.35 ns
CL = 50 pF
RL = 500 Ω
A or B B or A
Enable time tZH
tZL
5.5 ns
CL = 50 pF
RL = 500 Ω
OE A or B
tHZ 4.5 Disable time
tLZ 4.5
ns CL = 50 pF
RL = 500 Ω
OE A or B

VCC = 5.0±0.5 V

Item Symbol Min Max Unit Test conditions
FROM
(Input) TO
(Output)
Propagation delay time *1 tPLH
tPHL
0.25 ns
CL = 50 pF
RL = 500 Ω
A or B B or A
Enable time tZH
tZL
1.6 4.9 ns
CL = 50 pF
RL = 500 Ω
OE A or B
tHZ 1.0 4.2 Disable time
tLZ 1.0 4.8
ns CL = 50 pF
RL = 500 Ω
OE A or B
Note: 1. The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and
the specified load capacitance, when driven by an ideal voltage source (zero output impedance).
Test Circuit
OPEN
S1
CL = 50 pF
*1
500 Ω
Load circuit for outputs
Symbol
t / t
PLH PHL
t / t
ZH HZ
t / t
ZL LZ
S1
OPEN
OPEN
7 V
500 Ω
See under table
GND
Note: 1. CL includes probe and jig capacitance.