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SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS
SCAS375H – MARCH 1994 – REVISED MARCH 2005
PARAMETER MEASUREMENT INFORMATION
B PORT
7V
From Output
Under Test
C
L
= 50 pF
(see Note A)
500
Ω
S1
Open
TEST
GND
500
Ω
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
S1
Open
7V
GND
LOAD CIRCUIT
t
w
3V
Input
1.5 V
1.5 V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
Output
Control
t
PZL
3V
Input
t
PLH
Output
1.5 V
1.5 V
1.5 V
0V
t
PHL
V
OH
1.5 V
V
OL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
NONINVERTING OUTPUTS
Output
Waveform 1
S1 at 7 V
(see Note B)
t
PZH
Output
Waveform 2
S1 at GND
(see Note B)
1.5 V
1.5 V
3V
1.5 V
1.5 V
0V
t
PLZ
3.5 V
V
OL
+ 0.3 V
t
PHZ
V
OH
- 0.3 V
V
OH
≈0
V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
V
OL
NOTES: A. C
L
includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤
10 MHz, Z
O
= 50
Ω,
t
r
≤
2.5 ns, t
f
≤
2.5 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. All parameters and waveforms are not applicable to all devices.
Figure 2. Load Circuit and Voltage Waveforms
7
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