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Unisonic Technologies |
UNISONIC TECHNOLOGIES CO., LTD
U74AHC373
OCTAL TRANSPARENT
D-TYPE LATCHES WITH
3-STATE OUTPUTS
DESCRIPTION
The U74AHC373 is an octal transparent D-type latch with
3-state outputs, and it has 8 channels.
When the OE input is low and the LE input is high, the Q
outputs follow the D inputs. When OE is low and LE is low, the
Q outputs are latched at the logic levels of the D inputs.
When the OE input is high, the outputs are in the
high-impedance. The OE does not affect the internal operations
of the latches. Old data can be retained or new data can be
entered while 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 pull-up resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
FEATURES
* Operate from 2V to 5.5V
* Inputs Accept Voltages to 5.5V
* Max tPD of 13.5ns at VCC=3.3V, CL=15pF
* Typ VOL< 0.36V at VCC=3V, IOL=4mA, TA=25°C
* Typ VOH> 2.58V at VCC=3V, IOH=-4mA, TA=25°C
ORDERING INFORMATION
Ordering Number
U74AHC373G-R20-T
U74AHC373G-P20-R
Package
SSOP-20
TSSOP-20
CMOS IC
Packing
Tube
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R502-669.C
U74AHC373
PIN CONFIGURATION
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 5Q
11 LE
FUNCTION TABLE
INPUTS( OE )
INPUTS(LE)
INPUTS(D)
L HH
LHL
LLX
HXX
Note: H: HIGH voltage level; L: LOW voltage level.
LOGIC SYMBOL
OUTPUT(Q)
H
L
Q0
Z
CMOS IC
LOGIC DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-669.C
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