- 您现在的位置：买卖IC网 > PDF目录97067 > SN74AVCH244DWR (TEXAS INSTRUMENTS INC) AVC SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20 PDF资料下载
参数资料
| 型号： | SN74AVCH244DWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | AVC SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封装： | PLASTIC, SO-20 |
| 文件页数： | 1/10页 |
| 文件大小： | 166K |
| 代理商： | SN74AVCH244DWR |
SN74AVCH244
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES262C – APRIL 1999 – REVISED FEBRUARY 2000
3–13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D DOC (Dynamic Output Control) Circuit
Dynamically Changes Output Impedance,
Resulting in Noise Reduction Without
Speed Degradation
D EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
D Less Than 2-ns Maximum Propagation
Delay at 2.5-V and 3.3-V VCC
D Dynamic Drive Capability Is Equivalent to
Standard Outputs With IOH and IOL of
±24 mA at 2.5-V VCC
D Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
D Ioff Supports Partial-Power-Down Mode
Operation
D Bus Hold on Data Inputs Eliminates the
Need for External Pullup / Pulldown
Resistors
D 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 VOL vs IOL and VOH vs IOH 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.
136
–128
–144
–160
0.4
0.8
1.2
1.6
2.0
2.4
2.8
170
153
119
102
85
68
51
34
17
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
TA = 25°C
Process = Nominal
IOL – Output Current – mA
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
–
Output
V
oltage
–
V
OL
V
TA = 25°C
Process = Nominal
IOH – Output Current – mA
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
–
Output
V
oltage
–
V
OH
V
–80
–96
–112
–32
–48
–64
0
–16
Figure 1. Output Voltage vs Output Current
This octal buffer/driver is operational at 1.2-V to 3.6-V VCC, but is designed specifically for 1.65-V to 3.6-V VCC
operation.
The SN74AVCH244 is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE
is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
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.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
PRODUCT
PREVIEW
Copyright
2000, Texas Instruments Incorporated
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
DOC and EPIC are trademarks of Texas Instruments Incorporated.
相关PDF资料 |
PDF描述 |
|---|---|
| SN74BCT126ADG4 | BCT/FBT SERIES, QUAD 1-BIT DRIVER, TRUE OUTPUT, PDSO14 |
| SN74BCT2240DB | BCT/FBT SERIES, DUAL 4-BIT DRIVER, INVERTED OUTPUT, PDSO20 |
| SN74BCT2241N-10 | BCT/FBT SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDIP20 |
| SNJ54BCT2241J-00 | BCT/FBT SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, CDIP20 |
| SN74BCT2241DW-00 | BCT/FBT SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74AVCH24T245GRGR | 功能描述:转换 - 电压电平 24B Dual-Supply Bus Trans RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| SN74AVCH24T245ZRGR | 功能描述:转换 - 电压电平 24B Dual-Supply Bus Trans RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| SN74AVCH2T45DCTR | 功能描述:转换 - 电压电平 DUALB DUAL SUPPLY Bus Transceiver RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| SN74AVCH2T45DCTT | 功能描述:转换 - 电压电平 DUALB DUAL SUPPLY Bus Transceiver RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
| SN74AVCH2T45DCUR | 功能描述:转换 - 电压电平 DUALBDUALSplyBUS Transw/CnfgrbleVltg RoHS:否 制造商:Micrel 类型:CML/LVDS/LVPECL to LVCMOS/LVTTL 传播延迟时间:1.9 ns 电源电流:14 mA 电源电压-最大:3.6 V 电源电压-最小:3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MLF-8 |
发布紧急采购，3分钟左右您将得到回复。