74ABT20 Просмотр технического описания (PDF) - Philips Electronics
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74ABT20 Datasheet PDF : 3 Pages
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Philips Semiconductors
Dual 4-input NAND gate
Product specification
74ABT20
AC CHARACTERISTICS
GND = 0V; tR = tF = 2.5ns; CL = 50pF, RL = 500Ω
LIMITS
SYMBOL
PARAMETER
WAVEFORM
Tamb = +25°C
VCC = +5.0V
MIN
TYP
MAX
Tamb = –40°C to +85°C
VCC = +5.0V ±0.5V
MIN
MAX
UNIT
tPLH
Propagation delay
tPHL
An, Bn, Cn, Dn to Yn
1
1.0
2.7
3.9
1.0
1.0
2.2
3.4
1.0
4.6
3.8
ns
tOSHL
tOSLH1
Output to Output skew
An or Bn to Yn
2
0.3
0.5
0.5
ns
NOTE:
1. 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 the same direction, either HIGH–to-LOW (tOSHL) or LOW-to-HIGH (tOSLH);
parameter guaranteed by design.
AC WAVEFORMS
VM = 1.5V, VIN = GND to 3.0V
An, Bn,
Cn, Dn
VM
VM
tPHL
tPLH
Yn
VM
VM
SA00353
Waveform 1. Propagation Delay for Inverting Outputs
TEST CIRCUIT AND WAVEFORMS
VCC
VIN
PULSE
GENERATOR
D.U.T.
VOUT
RT
RL
CL
Test Circuit for Outputs
DEFINITIONS
RL = Load resistor; see AC CHARACTERISTICS for value.
CL = Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
RT = Termination resistance should be equal to ZOUT of
pulse generators.
INPUT
OUTPUT
OUTPUT N
same part
tPLH
MIN
tPHL
MIN
tPLH MAX
tOSLH
tPHLMAX
tOSHL
Waveform 2. Common edge skew
SA00381
90%
NEGATIVE
PULSE
POSITIVE
PULSE
10%
VM
10%
tW
VM
10%
tTHL (tF)
tTLH (tR)
90%
VM
90%
VM
tW
VM = 1.5V
Input Pulse Definition
90%
AMP (V)
0V
tTLH (tR)
tTHL (tF)
AMP (V)
10%
0V
INPUT PULSE REQUIREMENTS
FAMILY
Amplitude Rep. Rate tW
tR
tF
74ABT
3.0V
1MHz 500ns 2.5ns 2.5ns
SH00067
1995 Sep 22
3
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