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74LVTH16245ADLRG4 Scheda tecnica(PDF) 1 Page - Texas Instruments

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Il numero della parte 74LVTH16245ADLRG4
Spiegazioni elettronici  3.3-V ABT 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

74LVTH16245ADLRG4 Scheda tecnica(HTML) 1 Page - Texas Instruments

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FEATURES
SN54LVTH16245A . . . WD PACKAGE
SN74LVTH16245A . . . DGG, DGV, 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
DESCRIPTION/ORDERING INFORMATION
SN54LVTH16245A
,, SN74LVTH16245A
3.3-V ABT 16-BIT BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS143R – MAY 1992 – REVISED NOVEMBER 2006
• Members of the Texas Instruments Widebus™
Family
• State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V Operation
and Low Static-Power Dissipation
• Support Mixed-Mode Signal Operation (5-V
Input and Output Voltages With 3.3-V VCC)
• Support Unregulated Battery Operation Down
to 2.7 V
• Typical V
OLP (Output Ground Bounce) <0.8 V
at VCC = 3.3 V, TA = 25°C
• Distributed V
CC and GND Pins Minimize
High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB
Layout
• I
off and Power-Up 3-State Support Hot
Insertion
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 500 mA Per
JESD 17
• ESD Protection Exceeds JESD 22
2000-V Human-Body Model (A114-A)
200-V Machine Model (A115-A)
The 'LVTH16245A devices are 16-bit (dual-octal) noninverting 3-state transceivers designed for low-voltage
(3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment.
The devices are designed for asynchronous communication between two data buses. The logic levels of the
direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port
outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to
the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are
activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level
applied to prevent excess ICC and ICCZ.
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.
When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, 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.
These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry
disables the outputs, preventing damaging current backflow through the devices when they are powered down.
The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
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 © 1992–2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
On products compliant to MIL-PRF-38535, all parameters are
Instruments standard warranty. Production processing does not
tested unless otherwise noted. On all other products, production
necessarily include testing of all parameters.
processing does not necessarily include testing of all parameters.


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