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參數(shù)資料
| 型號(hào)： | SN74AVCH245DW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS |
| 中文描述： | 八路總線收發(fā)器具有三態(tài)輸出 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 177K |
| 代理商： | SN74AVCH245DW |
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.
SN74AVCH245
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES264C – APRIL 1999 – REVISED DECEMBER 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
DOC
(Dynamic Output Control) Circuit
Dynamically Changes Output Impedance,
Resulting in Noise Reduction Without
Speed Degradation
EPIC
(Enhanced-Performance Implanted
CMOS) Submicron Process
Less Than 2-ns Maximum Propagation
Delay at 2.5-V and 3.3-V V
CC
Dynamic Drive Capability Is Equivalent to
Standard Outputs With I
OH
and I
OL
of
±
24 mA at 2.5-V V
CC
Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
I
off
Supports Partial-Power-Down Mode
Operation
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Package Options Include Plastic
Small-Outline (DW), Thin Very
Small-Outline (DGV), and Thin Shrink
Small-Outline (PW) Packages
description
A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output
impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1
shows typical V
OL
vs I
OL
and V
OH
vs I
OH
curves to illustrate the output impedance and drive capability of the
circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is
equivalent to a high-drive standard-output device. For more information, refer to the TI application reports, AVC
Logic Family Technology and Applications literature number SCEA006, and Dynamic Output Control (DOC
)
Circuitry Technology and Applications literature number SCEA009.
3.2
2.8
2.4
2.0
1.6
1.2
0.8
0.4
153
136
119
102
85
68
51
34
17
TA = 25
°
C
Process = Nominal
IOL – Output Current – mA
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
–
O
V
2.8
2.4
2.0
1.6
1.2
0.8
0.4
–32
–48
–64
–80
–96
–112
IOH – Output Current – mA
–128
–144
–16
TA = 25
°
C
Process = Nominal
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
–
O
V
170
0
0
–160
Figure 1. Output Voltage vs Output Current
This octal bus transceiver is operational at 1.2-V to 3.6-V V
CC
, but is designed specifically for 1.65-V to 3.6-V
V
CC
operation.
The SN74AVCH245 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 device so the buses are
effectively isolated.
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission 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 device so that the buses are effectively isolated.
P
PRODUCT PREVIEW information concerns products in the formative or
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
Copyright
1999, Texas Instruments Incorporated
DOC, EPIC, and Widebus are trademarks of Texas Instruments Incorporated.
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| SN74AVCH24T245GRGR | 功能描述:轉(zhuǎn)換 - 電壓電平 24B Dual-Supply Bus Trans 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 |
| SN74AVCH24T245ZRGR | 功能描述:轉(zhuǎn)換 - 電壓電平 24B Dual-Supply Bus Trans 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 |
| SN74AVCH2T45DCTR | 功能描述:轉(zhuǎn)換 - 電壓電平 DUALB DUAL SUPPLY Bus Transceiver 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 |
| SN74AVCH2T45DCTT | 功能描述:轉(zhuǎn)換 - 電壓電平 DUALB DUAL SUPPLY Bus Transceiver 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 |
| SN74AVCH2T45DCUR | 功能描述:轉(zhuǎn)換 - 電壓電平 DUALBDUALSplyBUS Transw/CnfgrbleVltg 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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