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74VCX245 Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs
June 1999
Revised December 2013
74VCX245
Low Voltage Bidirectional Transceiver
with 3.6V Tolerant Inputs and Outputs
General Description
The VCX245 contains eight non-inverting bidirectional buff-
ers with 3-STATE outputs and is intended for bus oriented
applications. The T/R input determines the direction of data
flow. The OE input disables both the A and B ports by plac-
ing them in a high impedance state.
The 74VCX245 is designed for low voltage (1.4V to 3.6V)
V
CC
applications with I/O compatibility up to 3.6V.
The 74VCX245 is fabricated with an advanced CMOS
technology to achieve high-speed operation while main-
taining low CMOS power dissipation.
Features
s
1.4V to 3.6V V
CC
supply operation
s
3.6V tolerant inputs and outputs
s
Power-off high impedance inputs and outputs
s
Supports Live Insertion and Withdrawal (Note 1)
s
t
PD
3.5 ns max for 3.0V to 3.6V V
CC
s
Static Drive (I
OH
/I
OL
)
r
24 mA @ 3.0V V
CC
s
Uses proprietary noise/EMI reduction
circuitry
s
Latchup performance exceeds 300 mA
s
ESD performance:
Human body model
!
2000V
Machine model
!
200V
s
Leadless DQFN Pb-Free package
Note 1:
To ensure the high impedance state during power up and power
down, OE
n
should be tied to V
CC
through a pull up resistor. The minimum
value of the resistor is determined by the current sourcing capability of the
driver.
Ordering Code:
Order Number
74VCX245WM
(Note 2)
74VCX245BQX
(Note 3)
74VCX245MTC
(Note 2)
Package
Number
M20B
MLP020B
MTC20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
射频识别(Radio Frequency Identification，RFID)技术是一种利用无线射频通信实现的非接触式自动识别技术，与目前广泛采用的条形码技术相比，RFID具有容量大、识别距离远、穿透能力强、抗污性强等特点。RFID技术已经发展得比较成熟并获得了大规模商用，但超高频RFID技术相对滞后。本文分析了射频芯片nRF9E5的功能特性，并将其用于RFID系统中，设计了一套有源超高频(...[详细]
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