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參數資料
| 型號： | DM74LS244WMX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual 4-Bit Non-Inverting Buffer/Driver |
| 中文描述： | LS SERIES, DUAL 4-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | 0.300 INCH, MS-013, SOIC-20 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 65K |
| 代理商： | DM74LS244WMX |
2000 Fairchild Semiconductor Corporation
DS008442
www.fairchildsemi.com
August 1986
Revised March 2000
D
DM74LS244
Octal 3-STATE Buffer/Line Driver/Line Receiver
General Description
These buffers/line drivers are designed to improve both the
performance and PC board density of 3-STATE buffers/
drivers employed as memory-address drivers, clock driv-
ers, and bus-oriented transmitters/receivers. Featuring 400
mV of hysteresis at each low current PNP data line input,
they provide improved noise rejection and high fanout out-
puts and can be used to drive terminated lines down to
133
.
Features
I
3-STATE outputs drive bus lines directly
I
PNP inputs reduce DC loading on bus lines
I
Hysteresis at data inputs improves noise margins
I
Typical I
OL
(sink current)
I
Typical I
OH
(source current)
I
Typical propagation delay times
Inverting
10.5 ns
Noninverting
12 ns
I
Typical enable/disable time
I
Typical power dissipation (enabled)
Inverting
130 mW
Noninverting
135 mW
24 mA
15 mA
18 ns
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
L
=
LOW Logic Level
H
=
HIGH Logic Level
X
=
Either LOW or HIGH Logic Level
Z
=
High Impedance
Order Number
DM74LS244WM
DM74LS244SJ
DM74LS244N
Package Number
M20B
M20D
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Inputs
Output
G
L
L
H
A
L
H
X
Y
L
H
Z
相關PDF資料 |
PDF描述 |
|---|---|
| DM74LS245SJX | Single 8-bit Bus Transceiver |
| DM74LS245WMX | Single 8-bit Bus Transceiver |
| DM74LS245 | 3-STATE Octal Bus Transceiver(三態輸出八總線收發器) |
| DM74LS245N | 3-STATE Octal Bus Transceiver |
| DM74LS245SJ | 3-STATE Octal Bus Transceiver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DM74LS245 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| DM74LS245N | 功能描述:總線收發器 Oct 3-STATE Bus Tran RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數量: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 |
| DM74LS245SJ | 功能描述:總線收發器 Oct 3-STATE Bus Tran RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數量: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 |
| DM74LS245SJX | 功能描述:總線收發器 Oct 3-STATE Bus Tran RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數量: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 |
| DM74LS245WM | 功能描述:總線收發器 Oct 3-STATE Bus Tran RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數量: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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