Datasheet

©1999 Fairchild Semiconductor Corporation www.fairchildsemi.com
74LVT2245, 74LVTH2245 Rev. 1.5.0 5
74LVT2245, 74LVTH2245 — Low Voltage Octal Bidirectional Transceiver with 3-STATE Inputs/Outputs and 25Ω Series Resistors in the B Port Outputs
Dynamic Switching Characteristics
(6)
Notes:
6. Characterized in SOIC package. Guaranteed parameter, but not tested.
7. Max number of outputs defined as (n). n–1 data inputs are driven 0V to 3V. Output under test held LOW.
AC Electrical Characteristics
Note:
8. Skew is defined as the absolute value of the difference between the actual propagation delay for any two
separate outputs of the same device. The specification applies to any outputs switching in the same direction,
either HIGH-to-LOW (t
OSHL
) or LOW-to-HIGH (t
OSLH
).
Capacitance
(9)
Note:
9. Capacitance is measured at frequency f = 1MHz, per MIL-STD-883, Method 3012.
Symbol Parameter V
CC
(V)
Conditions T
A
= 25°C
UnitsC
L
= 50pF, R
L
= 500Ω Min. Typ. Max.
V
OLP
Quiet Output Maximum
Dynamic V
OL
3.3
(7)
0.8 V
V
OLV
Quiet Output Minimum
Dynamic V
OL
3.3
(7)
–0.8 V
Symbol Parameter
T
A
= –40°C to +85°C,
C
L
= 50pF, R
L
= 500Ω
Units
V
CC
= 3.3V ± 0.3V V
CC
= 2.7V
Min. Max. Min. Max.
t
PLH
Propagation Delay Data to B Port Output 1.2 4.4 1.2 5.1 ns
t
PHL
1.2 4.4 1.2 5.1
t
PLH
Propagation Delay Data to A Port Output 1.2 3.6 1.2 4.0 ns
t
PHL
1.2 3.5 1.2 4.0
t
PZH
Output Enable Time for B Port Output 1.3 6.2 1.3 7.3 ns
t
PZL
1.7 6.2 1.7 7.3
t
PZH
Output Enable Time for A Port Output 1.3 5.5 1.3 7.1 ns
t
PZL
1.7 5.7 1.7 6.7
t
PHZ
Output Disable Time for B Port Output 2.0 5.9 2.0 6.5 ns
t
PLZ
2.0 5.4 2.0 5.7
t
PHZ
Output Disable Time for A Port Output 2.0 5.9 2.0 6.5 ns
t
PLZ
2.0 5.0 2.0 5.1
t
OSHL
, t
OSLH
A Port Output to Output Skew
(8)
1.0 1.0 ns
t
OSHL
, t
OSLH
B Port Output to Output Skew
(8)
1.0 1.0 ns
Symbol Parameter Conditions Typical Units
C
IN
Input Capacitance V
CC
= 0V, V
I
= 0V or V
CC
4pF
C
I/O
Input/Output Capacitance V
CC
= 3.0V, V
O
= 0V or V
CC
8pF