74F38 데이터 시트보기 (PDF) - Philips Electronics
부품명
상세내역
제조사
74F38 Datasheet PDF : 8 Pages
| |||
Philips Semiconductors
Quad 2-input NAND buffer (open collector)
Product specification
74F38
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
TEST
CONDITION
tPLH
tPHL
Propagation delay
Dna, Dnb to Qn
Waveform 1
VCC = +5.0V
Tamb = +25°C
CL = 50pF, RL = 500Ω
MIN TYP MAX
7.5 10.0 12.5
1.5 3.0 5.0
LIMITS
VCC = +5.0V ± 10%
Tamb = 0°C to +70°C
CL = 50pF, RL = 500Ω
MIN
MAX
7.5
13.0
1.5
5.5
VCC = +5.0V ± 10%
Tamb = –40°C to +85°C
CL = 50pF, RL = 500Ω
MIN
MAX
7.5
14.5
1.5
6.0
UNIT
ns
AC WAVEFORMS
Dna, Dnb
VM
VM
tPHL
tPLH
Qn
VM
VM
SF00005
Waveform 1. Propagation delay for inverting outputs
NOTE:
For all waveforms, VM = 1.5V.
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
18
16
14
12
10
tPLH
8
6
4
tPHL
2
0
0
100
200
300
400
500
600
Load resistor (Ω)
SF00044
NOTE:
1 When using open collector parts, the value of the pull-up resistor greatly affects the value of the tPLH. For example, changing the specified
pull-up resistor value from 500Ω to 100Ω will improve the tPLH up to 50% with only a slight increase in the tPHL. However, if the value of the
pull-up resistor is changed, the user must make certain that the total IOL current through the resistor and the total IIL’s of the receivers does
not exceed the IOL minimum specification.
October 4, 1990
4
Share Link: 