Harman Kardon DVD 39/230, Руководство по обслуживанию

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SN54AHC541, SN74AHC541
OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCLS261M – DECEMBER 1995 – REVISED JULY 2003
1
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
D
Operating Range 2-V to 5.5-V V
CC
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
description/ordering information
The ’AHC541 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 noninverted 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.
ORDERING INFORMATION
TA PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N Tube SN74AHC541N SN74AHC541N
SOIC DW
Tube SN74AHC541DW
AHC541 SOIC – DW
Tape and reel SN74AHC541DWR
AHC541
40
°
C to 85
°
C
SOP – NS Tape and reel SN74AHC541NSR AHC541
–40
°
C to 85
°
C
SSOP – DB Tape and reel SN74AHC541DBR HA541
TSSOP PW
Tube SN74AHC541PW
HA541 TSSOP – PW
Tape and reel SN74AHC541PWR
HA541
TVSOP – DGV Tape and reel SN74AHC541DGVR HA541
CDIP – J Tube SNJ54AHC541J SNJ54AHC541J
–55
°
C to 125
°
C CFP – W Tube SNJ54AHC541W SNJ54AHC541W
LCCC – FK Tube SNJ54AHC541FK SNJ54AHC541FK
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
Copyright

2003, Texas Instruments Incorporated
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.
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.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE1
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE2
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
SN54AHC541 . . . J OR W PACKAGE
SN74AHC541 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
Y1
Y2
Y3
Y4
Y5
A3
A4
A5
A6
A7
SN54AHC541 . . . FK PACKAGE
(TOP VIEW)
A2 A1 OE1
Y7 Y6
OE2
A8
GND
Y8
V
CC
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.
harman/kardon DVD 39/DVD 49 service manual
Page 84 of 113