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PDF U74AHC245 Data sheet ( Hoja de datos )
| Número de pieza | U74AHC245 | |
| Descripción | OCTAL BUS TRANSCEIVERS | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
U74AHC245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
CMOS IC
DESCRIPTION
The U74AHC245 octal bus transceivers is designed for
asynchronous two-way communication between data buses. The
control-function implementation minimizes external timing
requirements.
The device allows data transmission from the A bus to the B
bus or from the B bus to the A bus, depending on the logic level at
the direction-control (DIR) input. The output-enable ( OE ) input can
be used to disable the device so that the buses are effectively
isolated.
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.
FEATURES
* Operating range 2V to 5.5V VCC
ORDERING INFORMATION
Ordering Number
U74AHC245G-P20-R
U74AHC245G-R20-R
U74AHC245G-S20-R
Package
TSSOP-20
SSOP-20
SOP-20
Packing
Tape Reel
Tape Reel
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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QW-R502-987.B
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U74AHC245
TEST CIRCUIT AND WAVEFORMS
VCC
K1
From Output
(Note 1)CL
RL
K2
CMOS IC
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics:
PRR≤1MHZ, ZO=50Ω, tr ≤ 3ns, tf ≤ 3ns.
3. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-987.B
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| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet U74AHC245.PDF ] | |
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