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74LVXC4245WMX 数据表(PDF) 1 Page - Fairchild Semiconductor

部件名 74LVXC4245WMX
功能描述  8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

74LVXC4245WMX 数据表(HTML) 1 Page - Fairchild Semiconductor

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© 2003 Fairchild Semiconductor Corporation
DS012009
www.fairchildsemi.com
February 1994
Revised October 2003
74LVXC4245
8-Bit Dual Supply Configurable Voltage Interface
Transceiver with 3-STATE Outputs
General Description
The LVXC4245 is a 24-pin dual-supply, 8-bit configurable
voltage interface transceiver suited for PCMCIA and other
real time configurable I/O applications. The VCCA pin
accepts a 5V supply level. The “A” Port is a dedicated 5V
port. The VCCB pin accepts a 3V-to-5V supply level. The
“B” Port is configured to track the VCCB supply level
respectively. A 5V level on the VCC pin will configure the
I/O pins at a 5V level and a 3V VCC will configure the I/O
pins at a 3V level. This device will allow the VCCB voltage
source pin and I/O pins on the “B” Port to float when OE is
HIGH. This feature is necessary to buffer data to and from
a PCMCIA socket that permits PCMCIA cards to be
inserted and removed during normal operation.
Features
s Bidirectional interface between 5V and 3V-to-5V buses
s Control inputs compatible with TTL level
s Outputs source/sink up to 24 mA
s Guaranteed simultaneous switching noise level and
dynamic threshold performance
s Implements patented EMI reduction circuitry
s Flexible VCCB operating range
s Allows B Port and VCCB to float simultaneously when OE
is HIGH
s Functionally compatible with the 74 series 245
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
Order Number
Package Number
Package Description
74LVXC4245WM
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LVXC4245QSC
MQA24
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
74LVXC4245MTC
MTC24
24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names
Description
OE
Output Enable Input
T/R
Transmit/Receive Input
A0–A7
Side A Inputs or 3-STATE Outputs
B0–B7
Side B Inputs or 3-STATE Outputs


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