74AHCT245 PHILIPS [NXP Semiconductors], 74AHCT245 Datasheet - Page 2

• Manufacturer Part Number: 74AHCT245
• Description: Octal bus transceiver; 3-state
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
FEATURES
DESCRIPTION
The 74AHC/AHCT245 is a
high-speed Si-gate CMOS device.
The 74AHC/AHCT245 is an octal
transceiver featuring non-inverting
3-state bus compatible outputs in
both send and receive directions.
The 74AHC245/74AHCT245 features
an Output Enable (OE) input for easy
cascading and a send/receive (DIR)
input for direction control.
OE controls the outputs so that the
buses are effectively isolated.
1999 Sep 28
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
For AHC only:
operates with CMOS input levels
For AHCT only:
operates with TTL input levels
Specified from
Octal bus transceiver; 3-state
40 to +85 and +125 C.
CC
Notes
1. C
2. The condition is V
FUNCTION TABLE
See Note 1.
Note
1. H = HIGH voltage level;
QUICK REFERENCE DATA
GND = 0 V; T
t
C
C
C
PHL
SYMBOL
I
O
PD
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
P
f
f
C
V
i
o
/t
D
CC
PD
= input frequency in MHz;
L
PLH
= output frequency in MHz;
(C
= output load capacitance in pF;
= C
OE
is used to determine the dynamic power dissipation (P
L
= supply voltage in Volts.
H
L
L
PD
V
amb
CC
propagation delay
A
input capacitance
output
capacitance
power dissipation
capacitance
INPUTS
n
V
2
PARAMETER
to B
CC
= 25 C; t
2
f
2
o
n
) = sum of outputs;
, B
I
= GND to V
f
i
n
+
to A
r
DIR
= t
H
X
L
(C
n
f
L
3.0 ns.
C
V
V
C
f = 1 MHz;
notes 1 and 2
CC
V
CONDITIONS
CC
I
L
L
CC
= V
.
= 15 pF;
= 50 pF;
74AHC245; 74AHCT245
= 5 V
2
CC
f
o
or GND 3.5
) where:
inputs
A = B
A
Z
INPUTS/OUTPUTS
n
3.5
4.0
12
AHC
Product specification
TYPICAL
5.0
3.5
4.0
15
AHCT
D
in W).
inputs
B = A
B
Z
n
ns
pF
pF
pF
UNIT