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74LVC244AD 参数 Datasheet PDF下载

74LVC244AD图片预览
型号: 74LVC244AD
PDF下载: 下载PDF文件 查看货源
内容描述: 八路缓冲器/线路驱动器;三态 [Octal buffer/line driver; 3-state]
分类和应用: 驱动器
文件页数/大小: 18 页 / 114 K
品牌: PHILIPS [ NXP SEMICONDUCTORS ]
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74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
Rev. 06 — 13 August 2009
Product data sheet
1. General description
The 74LVC244A; 74LVCH244A is an octal non-inverting buffer/line driver with 3-state
outputs. The 3-state outputs are controlled by the output enable inputs 1OE and 2OE.
A HIGH on nOE causes the outputs to assume a high-impedance OFF-state.
Schmitt-trigger action at all inputs makes the circuit highly tolerant for slower input rise
and fall times.
Inputs can be driven from either 3.3 V or 5.0 V devices. In 3-state operation, outputs can
handle 5 V. These features allow the use of these devices as translators in a mixed
3.3 V and 5 V environment.
The 74LVCH244A bus hold on data inputs eliminates the need for external pull-up
resistors to hold unused inputs.
2. Features
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5 V tolerant inputs/outputs for interfacing with 5 V logic
Wide supply voltage range from 1.2 V to 3.6 V
CMOS low-power consumption
Direct interface with TTL levels
Inputs accept voltages up to 5.5 V
High-impedance when V
CC
= 0 V
Bus hold on all data inputs (74LVCH244A only)
Complies with JEDEC standard no. 8-1A
ESD protection:
N
HBM JESD22-A114E exceeds 2000 V
N
MM JESD22-A115-A exceeds 200 V
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Specified from
−40 °C
to +85
°C
and
−40 °C
to +125
°C