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74ALVCHR16245GRE4 bảng dữ liệu(PDF) 1 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
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FEATURES
DESCRIPTION/ORDERING INFORMATION
DGG OR DL PACKAGE
(TOP VIEW)
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1DIR
1B1
1B2
GND
1B3
1B4
VCC
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
VCC
2B5
2B6
GND
2B7
2B8
2DIR
1OE
1A1
1A2
GND
1A3
1A4
VCC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
VCC
2A5
2A6
GND
2A7
2A8
2OE
SN74ALVCHR16245
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES064G – DECEMBER 1995 – REVISED OCTOBER 2004
Member of the Texas Instruments Widebus™
Family
Operates From 1.65 V to 3.6 V
Max tpd of 4.2 ns at 3.3 V
±12-mA Output Drive at 3.3 V
All Outputs Have Equivalent 26-
Ω Series
Resistors, So No External Resistors Are
Required
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
This 16-bit (dual-octal) noninverting bus transceiver is
designed for 1.65-V to 3.6-V VCC operation.
The
SN74ALVCHR16245
is
designed
for
asynchronous communication between data buses.
The
control-function
implementation
minimizes
external timing requirements.
This device can be used as two 8-bit transceivers or
one 16-bit transceiver. It allows data transmission
from the A bus to the B bus or from the B bus to the
A
bus,
depending
on
the
logic
level
at
the
direction-control (DIR) input. The output-enable (OE)
input can be used to disable the device so that the
buses are effectively isolated.
All outputs, which are designed to sink up to 12 mA, include equivalent 26-
Ω series resistors to reduce overshoot
and undershoot.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
SSOP - DL
Tape and reel
SN74ALVCHR16245LR
ALVCHR16245
TSSOP - DGG
Tape and reel
SN74ALVCHR16245GR
ALVCHR16245
-40
°C to 85°C
VFBGA - GQL
SN74ALVCHR16245KR
Tape and reel
VR245
VFBGA - ZQL (Pb-free)
74ALVCHR16245ZQLR
(1)
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.
Widebus is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 1995–2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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