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SN54LVT162244A, SN74LVT162244A
消耗积分:2 |
格式:rar |
大小:625 |
2010-07-19
刘芳
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4LVT162244A... WD PACKAGE
2244A... DGG, DGV, OR DL PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
48
47
46
45
44
43
42
41
40
39
38
1OE
1Y1
1Y2
GND
1Y3
1Y4
VCC
2Y1
2Y2
GND
2Y3
2Y4
2OE
1A1
1A2
GND
1A3
1A4
VCC
2A1
2A2
GND
2A3
2A4
DESCRIPTION/ORDERING INFORMATION
The 'LVT162244A devices are 16-bit buffers and line drivers designed for low-voltage (3.3-V) V CC operation, but
with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as four
4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical
active-low output-enable ( OE ) inputs.
The outputs, which are designed to source or sink up to 12 mA, include equivalent 22- Ω series resistors to
reduce overshoot and undershoot.
When V CC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, OE should be tied to V CC through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the driver.
These devices are fully specified for hot-insertion applications using I off
and power-up 3-state. The I off
circuitry
disables the outputs, preventing damaging current backflow through the devices when they are powered down.
The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
2244A... DGG, DGV, OR DL PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
48
47
46
45
44
43
42
41
40
39
38
1OE
1Y1
1Y2
GND
1Y3
1Y4
VCC
2Y1
2Y2
GND
2Y3
2Y4
2OE
1A1
1A2
GND
1A3
1A4
VCC
2A1
2A2
GND
2A3
2A4
DESCRIPTION/ORDERING INFORMATION
The 'LVT162244A devices are 16-bit buffers and line drivers designed for low-voltage (3.3-V) V CC operation, but
with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as four
4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical
active-low output-enable ( OE ) inputs.
The outputs, which are designed to source or sink up to 12 mA, include equivalent 22- Ω series resistors to
reduce overshoot and undershoot.
When V CC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, OE should be tied to V CC through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the driver.
These devices are fully specified for hot-insertion applications using I off
and power-up 3-state. The I off
circuitry
disables the outputs, preventing damaging current backflow through the devices when they are powered down.
The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
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