74F38 Philips, 74F38 Datasheet - Page 4

• Manufacturer Part Number: 74F38
• Description: Quad 2-input NAND buffer open collector
• Manufacturer: Philips

For all waveforms, V
1 When using open collector parts, the value of the pull-up resistor greatly affects the value of the t
Philips Semiconductors
AC ELECTRICAL CHARACTERISTICS
AC WAVEFORMS
Waveform 1. Propagation delay for inverting outputs
NOTE:
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
NOTE:
October 4, 1990
SYMBOL
t
t
PLH
PHL
Quad 2-input NAND buffer (open collector)
pull-up resistor value from 500 to 100 will improve the t
pull-up resistor is changed, the user must make certain that the total I
not exceed the I
Dna, Dnb
Qn
Propagation delay
Dna, Dnb to Qn
PARAMETER
OL
M
minimum specification.
= 1.5V.
V
M
t
PHL
V
M
18
16
14
12
10
8
6
4
2
0
0
V
CONDITION
CONDITION
Waveform 1
M
TEST
TEST
t
PLH
100
V
M
C
MIN
7.5
1.5
L
SF00005
= 50pF, R
T
V
200
amb
PLH
CC
TYP
10.0
3.0
= +5.0V
= +25 C
up to 50% with only a slight increase in the t
Load resistor
L
= 500
4
OL
MAX
300
12.5
5.0
current through the resistor and the total I
)
C
T
V
L
amb
MIN
CC
7.5
1.5
= 50pF, R
400
= +5.0V
= 0 C to +70 C
LIMITS
L
= 500
MAX
13.0
500
5.5
10%
PLH
t
t
PLH
PHL
. For example, changing the specified
SF00044
T
C
amb
PHL
V
600
L
MIN
CC
7.5
1.5
= 50pF, R
. However, if the value of the
= –40 C to +85 C
= +5.0V
IL
’s of the receivers does
L
Product specification
= 500
MAX
14.5
6.0
10%
74F38
UNIT
ns