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MC74LVXC3245
Configurable Dual Supply
Octal Transceiver
with 3–State Outputs for 3 V Systems
The 74LVXC3245 is a 24–pin dual–supply, octal configurable
voltage interface transceiver especially well suited for PCMCIA and
other real time configurable I/O applications. The VCCA pin accepts a
3 V supply level; the A port is a dedicated 3 V port. The VCCB pin
accepts a 3 V–to–5 V supply level. The B port is configured to track
the VCCB supply level. A 5 V level on the VCCB pin will configure the
I/O pins at a 5 V level and a 3 V VCCB will configure the I/O pins at a
3 V level. The A port interfaces with a 3 V host system and the B port
to the card slots. 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.
The Transmit/Receive (T/R) input determines the direction of data
flow. Transmit (active–High) enables data from the A port to B port.
Receive (active–Low) enables data from the B port to the A port.
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MARKING
DIAGRAMS
24
24
1
24
LVX
3245
AWLYYWW
SO–24
DW SUFFIX
CASE 751E
1
TSSOP–24
DT SUFFIX
CASE 948H
1
LVXC3245
AWLYYWW
24
•
•
•
•
•
•
•
•
Bidirectional Interface Between 3 V and 3 V/5 V Buses
Control Inputs Compatible with TTL Level
Outputs Source/Sink Up to 24 mA
Guaranteed Simultaneous Switching Noise Level and Dynamic
Threshold Performance
Available in SOIC and TSSOP Packages
Flexible VCCB Operating Range
Allows B Port and VCCB to Float Simultaneously When OE is High
Functionally Compatible With the 74 Series 245
1
A
WL
YY
WW
=
=
=
=
Assembly Location
Wafer Lot
Year
Work Week
ORDERING INFORMATION
Device
MC74LVXC3245DT
Package
TSSOP–24
Shipping
62 Units/Rail
MC74LVXC3245DTR2 TSSOP–24 2500 Tape/Reel
MC74LVXC3245DW
MC74LVX540DTR2
SO–24
SO–24
30 Units/Rail
1000 Tape/Reel
©
Semiconductor Components Industries, LLC, 2001
419
June, 2001 – Rev. 3
Publication Order Number:
MC74LVXC3245/D
MC74LVXC3245
OE 22
T/R 2
VCCB NC
24
23
OE
22
B0
21
B1
20
B2
19
B3
18
B4
17
B5
16
B6
15
B7
14
GND
13
A0
3
21
A1
4
20
1
2
3
A0
4
A1
5
A2
6
A3
7
A4
8
A5
9
A6
10
A7
11
12
A2
5
19
A3
6
18
A4
7
17
Function
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State Outputs
Side B 3–State Inputs or 3–State Outputs
A5
8
16
A6
9
15
A7
10
14
B7
B6
B5
B4
B3
B2
B1
B0
VCCA T/R
GND GND
Figure 1. 24–Lead Pinout
(Top View)
PIN NAMES
Pins
OE
T/R
A0–A7
B0–B7
Figure 2. Logic Diagram
INPUTS
OE
L
L
H
T/R
L
H
X
OPERATING MODE
Non–Inverting
B Data to A Bus
A Data to B Bus
Z
H = High Voltage Level; L = Low Voltage Level; Z = High Impedance State; X = High or Low Voltage Level
and Transitions are Acceptable; for ICC reasons, Do Not Float Inputs
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420
MC74LVXC3245
MAXIMUM RATINGS
Symbol
VCCA, VCCB
VI
VI/O
DC Supply Voltage
DC Input Voltage
DC Input/Output Voltage
OE, T/R
An
Bn
IIK
IOK
IO
ICC, IGND
TSTG
DC Input Diode Current
DC Output Diode Current
DC Output Source/Sink Current
DC Supply Current
Storage Temperature Range
DC Latchup Source/Sink Current
Per Output Pin
Maximum Current
OE, T/R
Parameter
Value
–0.5 to +7.0
–0.5 to VCCA +0.5
–0.5 to VCCA +0.5
–0.5 to VCCB +0.5
±20
±50
±50
±50
±200
–65 to +150
±300
VI < GND
VO < GND; VO > VCC
Condition
Unit
V
V
V
V
mA
mA
mA
mA
°C
mA
Maximum Ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those
indicated may adversely affect device reliability. Functional operation under absolute maximum–rated conditions is not implied. Functional
operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
VCCA, VCCB
VI
VI/O
TA
∆t/∆V
Parameter
Supply Voltage (VCCA
≤
VCCB)
Input Voltage
Input/Output Voltage
Operating Free–Air Temperature
Minimum Input Edge Rate
VIN from 30% to 70% of VCC; VCC at 3.0 V, 4.5 V, 5.5 V
VCCA
VCCB
OE, T/R
An
Bn
Min
2.3
3.0
0
0
0
–40
0
Max
3.6
5.5
VCCA
VCCA
VCCB
+85
8
Unit
V
V
V
°C
ns/V
DC ELECTRICAL CHARACTERISTICS
TA = 25°C
Symbol
VIHA
Parameter
Minimum HIGH
Level
Input Voltage
An
OE
T/R
Bn
VILA
Maximum LOW
Level
Input Voltage
An
OE
T/R
Bn
VOHA
Minimum HIGH
Level
Output Voltage
Condition
VCCA
2.3
3.0
3.6
2.3
3.0
3.6
2.3
3.0
3.6
2.3
3.0
3.6
3.0
3.0
3.0
2.3
2.3
3.0
3.0
3.0
3.0
VCCB
3.0
3.6
5.5
3.0
3.6
5.5
3.0
3.6
5.5
3.0
3.6
5.5
3.0
3.0
3.0
3.0
4.5
3.0
3.0
3.0
4.5
2.99
2.85
2.65
2.50
2.30
2.99
2.85
2.65
4.25
Typ
2.0
2.0
2.0
2.00
2.00
3.85
0.8
0.8
0.8
0.80
0.80
1.65
2.90
2.56
2.35
2.30
2.10
2.90
2.56
2.35
3.86
TA = –40 to +85°C
Guaranteed Limits
2.0
2.0
2.0
2.00
2.00
3.85
0.8
0.8
0.8
0.80
0.80
1.65
2.90
2.46
2.25
2.20
2.00
2.90
2.46
2.25
3.76
Unit
V
VIHB
VOUT
≤
0.1 V
or
≥
VCC – 0.1 V
V
V
VILB
VOUT
≤
0.1 V
or
≥
VCC – 0.1 V
V
IOUT = –100
µA
IOH = –12 mA
IOH = –24 mA
IOH = –12 mA
IOH = –24 mA
IOUT = –100
µA
IOH = –12 mA
IOH = –24 mA
IOH = –24 mA
V
VOHB
V
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421
MC74LVXC3245
DC ELECTRICAL CHARACTERISTICS
TA = 25°C
Symbol
VOLA
Parameter
Maximum LOW
Level
Output Voltage
Condition
IOUT = 100
µA
IOL = 24 mA
IOL = 12 mA
IOL = 24 mA
IOUT = 100
µA
IOL = 24 mA
IOL = 24 mA
Max Input Leakage
Current
Max 3–State Output
Leakage
Max 3–State Output
Leakage
Maximum ICC/Input
OE,
T/R
An
VI = VCCA, GND
VI = VIH, VIL
OE = VCCA
VO = VCCA, GND
VI = VIH, VIL
OE = VCCA
VO = VCCB, GND
VI = VCCB–2.1 V
VI = VCC–0.6 V
An = VCCA or GND
Bn = Open,
OE = VCCA,
T/R = VCCA,
VCCB = Open
An = VCCA or GND
Bn = VCCB or
GND, OE = GND,
T/R = GND
An = VCCA or GND
Bn = VCCB or
GND, OE = GND,
T/R = VCCA
Notes 1., 2.
Notes 1., 2.
Quiet Output Min
Dynamic VOL
Notes 1., 2.
Notes 1., 2.
Min HIGH Level
Dynamic Input Volt-
age
VCCA
3.0
3.0
2.7
2.7
3.0
3.0
3.0
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
VCCB
3.0
3.0
3.0
4.5
3.0
3.0
4.5
3.6
5.5
3.6
5.5
3.6
5.5
5.5
3.6
1.0
Typ
0.002
0.21
0.11
0.22
0.002
0.21
0.18
TA = –40 to +85°C
Guaranteed Limits
0.10
0.36
0.36
0.42
0.10
0.36
0.36
±0.1
±0.1
±0.5
±0.5
±0.5
±0.5
1.35
0.35
0.10
0.44
0.44
0.50
0.10
0.44
0.44
±1.0
±1.0
±5.0
±5.0
±5.0
±5.0
1.5
0.5
Unit
V
VOLB
V
IIN
IOZA
µA
µA
IOZB
µA
Bn
Bn
All
Inputs
∆I
CC
mA
mA
µA
ICCA1
Quiescent VCCA
Supply Current as B
Port Floats
3.6
Open
5
50
ICCA2
Quiescent VCCA
Supply Current
µA
3.6
3.6
3.6
5.5
5
5
50
50
µA
3.6
3.6
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.6
5.5
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
5
8
0.8
0.8
0.8
1.5
–0.8
–0.8
–0.8
–1.2
2.0
2.0
2.0
3.5
0.8
0.8
0.8
1.5
50
80
V
V
V
V
V
ICCB
Quiescent VCCB
Supply Current
VOLPA
VOLPB
VOLVA
VOLVB
VIHDA
Quiet Output Max
Dynamic VOL
Notes 1., 3.
VIHDB
VILDA
Max LOW Level
Dynamic Input Volt-
age
Notes 1., 3.
V
V
Notes 1., 3.
VILDB
Notes 1., 3.
V
1. Worst case package.
2. Max number of outputs defined as (n). Data inputs are driven 0 V to VCC level; one output at GND.
3. Max number of data inputs (n) switching. (n–1) inputs switching 0 V to VCC level. Input under test switching: VCC level to threshold (VIHD),
0 V to threshold (VILD), f = 1 MHz.
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