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SN74AVCH4T245PWR

更新时间： 2024-11-29 05:17:39
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德州仪器 - TI 总线收发器输出元件
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19页 604K
描述
4-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

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SN74AVCH4T245PWR 数据手册

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SN74AVCH4T245  
4-BIT DUAL-SUPPLY BUS TRANSCEIVER  
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS  
www.ti.com  
SCES577B–JUNE 2004–REVISED FEBRUARY 2006  
FEATURES  
•
Control Inputs VIH/VIL Levels Are Referenced  
to VCCA Voltage  
•
•
Latch-Up Performance Exceeds 100 mA Per  
JESD 78, Class II  
•
Fully Configurable Dual-Rail Design Allows  
Each Port to Operate Over the Full 1.2-V to  
3.6-V Power-Supply Range  
ESD Protection Exceeds JESD 22  
– 8000-V Human-Body Model (A114-A)  
– 200-V Machine Model (A115-A)  
•
•
I/Os Are 4.6-V Tolerant  
– 1000-V Charged-Device Model (C101)  
Ioff Supports Partial Power-Down-Mode  
Operation  
•
Bus Hold on Data Inputs Eliminates the Need  
for External Pullup/Pulldown Resistors  
D, DGV, OR PW PACKAGE  
(TOP VIEW)  
RGY PACKAGE  
(TOP VIEW)  
V
V
CCB  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
CCA  
1DIR  
2DIR  
1A1  
1OE  
2OE  
1B1  
1
16  
15  
14  
13  
12  
11  
10  
1DIR  
2DIR  
1A1  
1A2  
2A1  
2A2  
2
3
4
5
6
7
1OE  
2OE  
1B1  
1B2  
2B1  
2B2  
1A2  
12 1B2  
11  
10  
9
2A1  
2B1  
2B2  
GND  
2A2  
GND  
8
9
DESCRIPTION/ORDERING INFORMATION  
This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed  
to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB  
accepts any supply voltage from 1.2 V to 3.6 V. The SN74AVCH4T245 is optimized to operate with VCCA/VCCB  
set at 1.4 V to 3.6 V. It is operational with VCCA/VCCB as low as 1.2 V. This allows for universal low-voltage  
bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.  
The SN74AVCH4T245 is designed for asynchronous communication between data buses. The device transmits  
data 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 outputs so the buses are  
effectively isolated.  
The SN74AVCH4T245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA  
.
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.  
The VCC isolation feature ensures that if either VCC input is at GND, then both ports are in the high-impedance  
state. The bus-hold circuitry on the powered-up side always stays active.  
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.  
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.  
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.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2004–2006, 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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SN74AVCH4T245PWR 替代型号

型号 品牌 替代类型 描述 数据表
SN74AVCH4T245PWT TI

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 4-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUT
SN74AVCH4T245PW TI

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 4-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUT
SN74AVCH4T245RSVR TI

类似代替

 4-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUT

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