NXP Semiconductors
74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
Table 6.
Static characteristics
…continued
At recommended operating conditions. Voltages are referenced to GND (ground = 0 V).
Symbol
C
I
I
BHL
I
BHH
I
BHLO
I
BHHO
Parameter
input capacitance
bus hold LOW
current
bus hold HIGH
current
bus hold LOW
overdrive current
bus hold HIGH
overdrive current
V
CC
= 3.0 V; V
I
= 0.8 V
V
CC
= 3.0 V; V
I
= 2.0 V
V
CC
= 3.6 V
V
CC
= 3.6 V
Conditions
−40 °C
to +85
°C
Min
-
75
−75
500
−500
Typ
[1]
4.0
-
-
-
-
Max
-
-
-
-
-
−40 °C
to +125
°C
Unit
Min
-
60
−60
500
−500
Max
-
-
-
-
-
pF
µA
µA
µA
µA
[1]
[2]
[3]
[4]
[5]
[6]
All typical values are measured at V
CC
= 3.3 V (unless stated otherwise) and T
amb
= 25
°C.
The bus hold circuit is switched off when V
I
> V
CC
allowing 5.5 V on the input terminal.
For I/O ports the parameter I
OZ
includes the input leakage current.
Valid for data inputs of bus hold parts only (74LVCH244A). Note that control inputs do not have a bus hold circuit.
The specified sustaining current at the data input holds the input below the specified V
I
level.
The specified overdrive current at the data input forces the data input to the opposite input state.
10. Dynamic characteristics
Table 7.
Dynamic characteristics
Voltages are referenced to GND (ground = 0 V). For test circuit see
Symbol Parameter
t
pd
propagation
delay
Conditions
nAn to nYn; see
V
CC
= 1.2 V
V
CC
= 2.7 V
V
CC
= 3.0 V to 3.6 V
t
en
enable time
nOE to nYn; see
V
CC
= 1.2 V
V
CC
= 2.7 V
V
CC
= 3.0 V to 3.6 V
t
dis
disable time
nOE to nYn; see
V
CC
= 1.2 V
V
CC
= 2.7 V
V
CC
= 3.0 V to 3.6 V
t
sk(o)
output skew
time
−40 °C
to +85
°C
Min
-
1.5
1.5
-
1.5
1.0
-
1.5
1.5
-
Typ
17.0
3.3
2.8
24.0
3.3
3.4
9.0
3.2
2.9
-
Max
-
6.9
5.9
-
8.6
7.6
-
6.8
5.8
1.0
−40 °C
to +125
°C
Unit
Min
-
1.5
1.5
-
1.5
1.0
-
1.5
1.5
-
Max
-
9.0
7.5
-
11
9.5
-
8.5
7.5
1.5
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
74LVC_LVCH244A_6
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 06 — 13 August 2009
7 of 18
PHILIPS [ NXP SEMICONDUCTORS ]
