SN54AHCT540, SN74AHCT540
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS268L 鈥?DECEMBER 1995 鈥?REVISED JULY 2003
D
D
D
Inputs Are TTL-Voltage Compatible
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds JESD 22
鈥?2000-V Human-Body Model (A114-A)
鈥?200-V Machine Model (A115-A)
鈥?1000-V Charged-Device Model (C101)
SN54AHCT540 . . . J OR W PACKAGE
SN74AHCT540 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
description/ordering information
The 鈥橝HCT540 octal buffers/drivers are ideal for
driving bus lines or buffer memory address
registers. These devices feature inputs and
outputs on opposite sides of the package to
facilitate printed circuit board layout.
The 3-state control gate is a two-input AND gate
with active-low inputs so that if either
output-enable (OE1 or OE2) input is high, all
corresponding outputs are in the high-impedance
state. The outputs provide inverted data when
they are not in the high-impedance state.
To ensure the high-impedance state during power
up or power down, OE should be tied to V
CC
through a pullup resistor; the minimum value of
the resistor is determined by the current-sinking
capability of the driver.
OE1
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
OE2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
SN54AHCT540 . . . FK PACKAGE
(TOP VIEW)
A3
A4
A5
A6
A7
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
A2
A1
OE1
V
CC
OE2
Y1
Y2
Y3
Y4
Y5
ORDERING INFORMATION
TA
PDIP 鈥?N
SOIC 鈥?DW
40擄C
鈥?0擄C to 85擄C
SOP 鈥?NS
SSOP 鈥?DB
TSSOP 鈥?PW
TVSOP 鈥?DGV
CDIP 鈥?J
鈥?5擄C to 125擄C
CFP 鈥?W
LCCC 鈥?FK
PACKAGE鈥?/div>
Tube
Tube
Tape and reel
Tape and reel
Tape and reel
Tube
Tape and reel
Tape and reel
Tube
Tube
Tube
ORDERABLE
PART NUMBER
SN74AHCT540N
SN74AHCT540DW
SN74AHCT540DWR
SN74AHCT540NSR
SN74AHCT540DBR
SN74AHCT540PW
SN74AHCT540PWR
SN74AHCT540DGVR
SNJ54AHCT540J
SNJ54AHCT540W
SNJ54AHCT540FK
TOP-SIDE
MARKING
SN74AHCT540N
AHCT540
AHCT540
HB540
HB540
HB540
SNJ54AHCT540J
SNJ54AHCT540W
SNJ54AHCT540FK
鈥?Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
錚?/div>
2003, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
A8
GND
Y8
Y7
Y6
1
next