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SN74LVCH16245A_06

更新时间： 2024-11-05 05:16:59
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德州仪器 - TI 总线收发器输出元件
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17页 464K
描述
16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

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SN74LVCH16245A_06 数据手册

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SN74LVCH16245A  
16-BIT BUS TRANSCEIVER  
WITH 3-STATE OUTPUTS  
www.ti.com  
SCES495B–OCTOBER 2003–REVISED AUGUST 2006  
FEATURES  
DGG, DGV, OR DL PACKAGE  
(TOP VIEW)  
•
Member of the Texas Instruments Widebus™  
Family  
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25  
1DIR  
1B1  
1B2  
GND  
1B3  
1B4  
1OE  
1A1  
1A2  
GND  
1A3  
1A4  
•
•
•
•
Operates From 1.65 V to 3.6 V  
Inputs Accept Voltages to 5.5 V  
Max tpd of 4 ns at 3.3 V  
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3
4
Typical VOLP (Output Ground Bounce) <0.8 V  
at VCC = 3.3 V, TA = 25°C  
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•
•
Typical VOHV (Output VOH Undershoot) >2 V at  
VCC = 3.3 V, TA = 25°C  
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V
CC  
V
CC  
8
1B5  
1B6  
GND  
1B7  
1B8  
2B1  
2B2  
GND  
2B3  
2B4  
1A5  
1A6  
GND  
1A7  
1A8  
2A1  
2A2  
GND  
2A3  
2A4  
9
Supports Mixed-Mode Signal Operation on All  
Ports (5-V Input/Output Voltage With  
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3.3-V VCC  
)
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Ioff Supports Partial-Power-Down Mode  
Operation  
Bus Hold on Data Inputs Eliminates the Need  
for External Pullup/Pulldown Resistors  
Latch-Up Performance Exceeds 250 mA Per  
JESD 17  
V
CC  
V
CC  
ESD Protection Exceeds JESD 22  
– 2000-V Human-Body Model (A114-A)  
– 200-V Machine Model (A115-A)  
2B5  
2B6  
GND  
2B7  
2B8  
2DIR  
2A5  
2A6  
GND  
2A7  
2A8  
2OE  
DESCRIPTION/ORDERING  
INFORMATION  
This 16-bit (dual-octal) noninverting bus transceiver  
is designed for 1.65-V to 3.6-V VCC operation.  
This device can be used as two 8-bit transceivers or one 16-bit transceiver.  
The SN74LVCH16245A is designed for asynchronous communication between 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 always is 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 data inputs at a valid logic state. Use of pullup or pulldown  
resistors with the bus-hold circuitry is not recommended. The bus-hold circuitry is part of the input circuit and is  
not disabled by OE or DIR.  
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.  
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators  
in a mixed 3.3-V/5-V system environment.  
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs,  
preventing damaging current backflow through the device when it is powered down.  
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 © 2003–2006, 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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