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부품번호 | 74LVXC4245QSC 기능 |
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기능 | 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs | ||
제조업체 | Fairchild Semiconductor | ||
로고 | |||
전체 8 페이지수
February 1994
Revised July 1999
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:
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
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
Pin Descriptions
Pin Names
OE
T/R
A0–A7
B0–B7
Description
Output Enable Input
Transmit/Receive Input
Side A Inputs or 3-STATE Outputs
Side B Inputs or 3-STATE Outputs
© 1999 Fairchild Semiconductor Corporation DS012009
www.fairchildsemi.com
DC Electrical Characteristics (Continued)
Symbol
Parameter
VCCA
(V)
VCCB
(V)
TA = +25°C
TA = −40°C to +85°C Units
Typ Guaranteed Limits
Conditions
IOZA
IOZB
∆ICC
ICCA1
ICCA2
ICCB
VOLPA
Maximum 3-STATE
Output Leakage @ An
Maximum 3-STATE
Output Leakage @ Bn
Maximum
All Inputs
ICC/Input
Quiescent VCCA
Supply Current as B
Bn
Port Floats
Quiescent VCCA
Supply Current
Quiescent VCCB
Supply Current
Quiet Output
Maximum Dynamic
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.0
5.0
3.6
5.5
3.6
5.5
5.5
3.6
Open
3.6
5.5
3.6
5.5
3.3
5.0
1.0
±0.5
±0.5
±0.5
±0.5
1.35
0.35
8
8
8
5
8
1.5
1.5
±5.0
±5.0
±5.0
±5.0
1.5
0.5
80
80
80
50
80
µA VI = VIL, VIH, OE = VCCA
VO = VCCA, GND
µA VI = VIL, VIH, OE = VCCA
VO = VCCB, GND
mA VI = VCC − 2.1V
mA VI = VCCB − 0.6V
An = VCCA or GND
µA Bn = Open, OE = VCCA
T/R = VCCA, VCCB = Open
An = VCCA or GND
µA Bn = VCCB or GND
OE = GND, T/R = GND
An = VCCA or GND
µA Bn = VCCB or GND
OE = GND, T/R = VCCA
(Note 3) (Note 4)
V
VOLPB
VOL
5.0 3.3
5.0 5.0
0.8
1.5
(Note 3) (Note 4)
V
VOLVA
VOLVB
Quiet Output Minimum
Dynamic VOL
5.0 3.3
5.0 5.0
5.0 3.3
5.0 5.0
−1.2
−1.2
−0.8
−1.2
(Note 3) (Note 4)
V
(Note 3) (Note 4)
V
VIHDA
Minimum HIGH Level
Dynamic Input
5.0 3.3
5.0 5.0
2.0
2.0
(Note 3) (Note 5)
V
VIHDB
Voltage
5.0 3.3
5.0 5.0
2.0
3.5
(Note 3) (Note 5)
V
VILDA
Maximum LOW Level
Dynamic Input
5.0 3.3
5.0 5.0
0.8
0.8
(Note 3) (Note 5)
V
VILDB
Voltage
5.0 3.3
5.0 5.0
0.8
1.5
(Note 3) (Note 5)
V
Note 3: Worst case package.
Note 4: Max number of outputs defined as (n). Data inputs are driven 0V to VCC level; one output at GND.
Note 5: Max number of Data Inputs (n) switching. (n−1) inputs switching 0V to VCC level. Input-under-test switching:
VCC level to threshold (VIHD), 0V to threshold (VILD), f = 1 MHz.
www.fairchildsemi.com
4
4페이지 Physical Dimensions inches (millimeters) unless otherwise noted
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
Package Number M24B
24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150” Wide
Package Number MQA24
7 www.fairchildsemi.com
7페이지 | |||
구 성 | 총 8 페이지수 | ||
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부품번호 | 상세설명 및 기능 | 제조사 |
74LVXC4245QSC | 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs | Fairchild Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |