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參數(shù)資料
| 型號(hào)： | SN74AVC4T774PWG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | AVC SERIES, 4-BIT TRANSCEIVER, TRUE OUTPUT, PDSO16 |
| 封裝： | GREEN, PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 809K |
| 代理商： | SN74AVC4T774PWG4 |
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
DIR1
A1
OE
B1
SCES693B – FEBRUARY 2008 – REVISED MAY 2008..................................................................................................................................................... www.ti.com
The SN74AVC4T774 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 in the high-impedance mode. The device transmits data from the A bus to the
B bus when the B outputs are activated, and from the B bus to the A bus when the A 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.
The SN74AVC4T774 is designed so that the control pins (DIR1, DIR2, DIR3, DIR4, and OE) 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.
To ensure the high-impedance state during power up or power down, OE should be tied to VCCA through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
Since this device has CMOS inputs, it is very important to not allow them to float. If the inputs are not driven to
either a high VCC state, or a low GND state, an undesirable larger than expected ICC current may result. Since
the input voltage settlement is governed by many factors (e.g. capacitance, board-layout, package inductance,
surrounding conditions, etc.), ensuring that they these inputs are kept out of erroneous switching states and tying
them to either a high or a low level minimizes the leakage-current.
ORDERING INFORMATION
TA
PACKAGE(1)(2)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
QFN – RGY
Tape and reel
SN74AVC4T774RGYR
WT774
QFN – RSV
Tape and reel
SN74AVC4T774RSVR
ZVK
–40
°C to 85°C
Tube
SN74AVC4T774PW
TSSOP – PW
WT774
Tape and reel
SN74AVC4T774PWR
(1)
Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(2)
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
FUNCTION TABLE
(Each Bit)
CONTROL INPUTS
OUTPUT CIRCUITS
OPERATION
OE
DIR
A PORT
B PORT
L
Enabled
Hi-Z
B data to A data
L
H
Hi-Z
Enabled
A data to B data
H
X
Hi-Z
Isolation
LOGIC DIAGRAM (POSITIVE LOGIC)(1)
(1)
Shown for a single channel
2
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): SN74AVC4T774
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN74AVC4T774PWR | 功能描述:轉(zhuǎn)換 - 電壓電平 4B Dual-Sply Bus Xceiver RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| SN74AVC4T774PWRG4 | 功能描述:轉(zhuǎn)換 - 電壓電平 4B Dual-Sply Bus Xceiver RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| SN74AVC4T774RGYR | 功能描述:轉(zhuǎn)換 - 電壓電平 4B Dual-Supply Bus Xcvr RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| SN74AVC4T774RSVR | 功能描述:轉(zhuǎn)換 - 電壓電平 4B Dual-Supply Bus Xcvr RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
| SN74AVC6T622PWR | 功能描述:轉(zhuǎn)換 - 電壓電平 Audio Codec Vltg Translation Xcvr RoHS:否 制造商:Micrel 類型:CML/LVDS/LVPECL to LVCMOS/LVTTL 傳播延遲時(shí)間:1.9 ns 電源電流:14 mA 電源電壓-最大:3.6 V 電源電壓-最小:3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MLF-8 |
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