1999 Nov 24 2
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74AHC541; 74AHCT541
FEATURES
• ESD protection:
HBM EIA/JESD22-A114-A exceeds 2000 V
MM EIA/JESD22-A115-A exceeds 200 V
CDM EIA/JESD22-C101 exceeds 1000 V
• Balanced propagation delays
• All inputs have a Schmitt-trigger action
• Inputs accepts voltages higher than V
CC
• For AHC only: operates with CMOS input levels
• For AHCT only: operates with TTL input levels
• Specified from −40 to +85 °C and −40 to +125 °C.
DESCRIPTION
The 74AHC/AHCT541 is a high-speed Si-gate CMOS
device.
The 74AHC/AHCT541 are octal non-inverting buffer/line
drivers with 3-state bus compatible outputs.
The 3-state outputs are controlled by the output enable
inputs OE
0
and OE
1
.
A HIGH on OE
n
causes the outputs to assume a
high-impedance OFF-state.
QUICK REFERENCE DATA
Ground = 0 V; T
amb
=25°C; t
r
=t
f
≤3.0 ns.
Notes
1. C
PD
is used to determine the dynamic power dissipation (P
D
in µW).
P
D
=C
PD
× V
CC
2
× f
i
+ ∑ (C
L
× V
CC
2
× f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
∑ (C
L
× V
CC
2
× f
o
) = sum of outputs;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts.
2. The condition is V
I
= GND to V
CC
.
SYMBOL PARAMETER CONDITIONS
TYPICAL
UNIT
AHC AHCT
t
PHL
/t
PLH
propagation delay A
n
to Y
n
C
L
= 15 pF; V
CC
= 5 V 3.5 3.5 ns
C
I
input capacitance V
I
=V
CC
or GND 3 3 pF
C
O
output capacitance 4.0 4.0 pF
C
PD
power dissipation capacitance C
L
= 50 pF; f = 1 MHz;
notes 1 and 2
10 12 pF
