74ABT540 データシートの表示（PDF） - Philips Electronics
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74ABT540 Datasheet PDF : 10 Pages
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Philips Semiconductors
Octal buffer, inverting (3-State)
Product specification
74ABT540
AC CHARACTERISTICS
GND = 0V; tR = tF = 2.5ns; CL = 50pF, RL = 500Ω
SYMBOL
PARAMETER
WAVEFORM
tPLH
Propagation delay
tPHL
An to Yn
1
tPZH
Output enable time
tPZL
to High and Low level
2
tPHZ
Output disable time
tPLZ
from High and Low level
2
AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V
LIMITS
Tamb = +25°C
VCC = +5.0V
Min
Typ
Max
Tamb = –40°C to +85°C
VCC = +5.0V ±0.5V
Min
Max
1.0
2.9
4.1
1.0
4.8
1.0
3.1
4.3
1.0
4.8
1.1
4.1
4.9
1.1
5.9
1.1
4.6
5.8
1.1
6.4
1.5
3.6
6.8
1.5
7.3
1.2
2.9
5.7
1.2
6.2
UNIT
ns
ns
ns
An INPUT
Yn OUTPUT
VM
tPHL
VM
VM
tPLH
VM
SA00200
Waveform 1. Waveforms Showing the Input (An) to Output (Yn)
Propagation Delays
TEST CIRCUIT AND WAVEFORMS
From Output
Under Test
CL = 50 pF
500 Ω
500 Ω
7V
S1
Open
GND
Load Circuit
TEST
S1
tpd
tPLZ/tPZL
tPHZ/tPZH
open
7V
open
DEFINITIONS
CL = Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
SA00012
OEn
INPUT
VM
tPZL
VM
tPLZ
3.5V
Yn
OUTPUT
Yn
OUTPUT
VM
tPZH
VM
tPHZ
VOL + 0.3V
VOL
VOH
VOH – 0.3V
0V
SA00201
Waveform 2. Waveforms Showing the 3-State Output Enable
and Disable Times
1998 Jan 16
5
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