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參數(shù)資料
| 型號： | SN74LVTH646DB |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 3.3-V ABT OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS |
| 中文描述： | 的3.3V ABT生根粉八路總線收發(fā)器和3冊態(tài)輸出 |
| 文件頁數(shù)： | 2/10頁 |
| 文件大?。?/td> | 137K |
| 代理商： | SN74LVTH646DB |
SN54LVTH646, SN74LVTH646
3.3-V ABT OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCBS705E – AUGUST 1997 – REVISED APRIL 1999
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description (continued)
When an output function is disabled, the input function is still enabled and can be used to store and transmit
data. Only one of the two buses, A or B, can be driven at a time.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
When V
CC
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 V
CC
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 I
off
and power-up 3-state. The I
off
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.
The SN54LVTH646 is characterized for operation over the full military temperature range of –55
°
C to 125
°
C.
The SN74LVTH646 is characterized for operation from –40
°
C to 85
°
C.
FUNCTION TABLE
INPUTS
DATA I/Os
OPERATION OR FUNCTION
OE
DIR
CLKAB
↑
X
↑
H or L
CLKBA
SAB
SBA
A1–A8
B1–B8
Unspecified
X
X
X
↑
↑
X
X
Input
Store A, B unspecified
Store B, A unspecified
X
X
X
X
Unspecified
Input
H
X
X
X
Input
Input
Store A and B data
H
X
H or L
X
X
Input disabled
Input disabled
Isolation, hold storage
L
L
X
X
X
L
Output
Input
Real-time B data to A bus
L
L
X
H or L
X
H
Output
Input
Stored B data to A bus
L
H
X
X
L
X
Input
Output
Real-time A data to B bus
L
H
H or L
X
H
X
Input
Output
Stored A data to B bus
The data-output functions can be enabled or disabled by various signals at OE and DIR. Data-input functions are always enabled; i.e., data at
the bus terminals is stored on every low-to-high transition of the clock inputs.
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| SN74LVTH646DGV | 3.3-V ABT OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS |
| SN54LVU04A | HEX INVERTERS |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SN74LVTH646DBR | 功能描述:總線收發(fā)器 Tri-St ABT Octal Bus RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LVTH646DBRE4 | 功能描述:總線收發(fā)器 3.3V ABT Octal Bus Xcvr/Reg RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LVTH646DBRG4 | 功能描述:總線收發(fā)器 3.3V ABT Octal Bus Transceivr Registr RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LVTH646DGVR | 功能描述:總線收發(fā)器 Tri-St ABT Octal Bus RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
| SN74LVTH646DGVRE4 | 功能描述:總線收發(fā)器 Single-Supply Voltage Translator RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel |
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