MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Advance Information
Configurable Dual Supply
Octal Transceiver
MC74LVXC3245
with 3-State Outputs for 3V 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 3V supply
level; the A port is a dedicated 3V port. The VCCB pin accepts a 3V–to–5V
supply level. The B port is configured to track the VCCB supply level. A 5V
level on the VCCB pin will configure the I/O pins at a 5V level and a 3V
VCCB will configure the I/O pins at a 3V level. The A port interfaces with a
3V 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.
LOW–VOLTAGE CMOS
LVX
•
•
•
•
DW SUFFIX
24–LEAD PLASTIC WIDE SOIC PACKAGE
CASE 751E–04
Bidirectional Interface Between 3V and 3V/5V Buses
Control Inputs Compatible with TTL Level
Outputs Source/Sink Up to 24mA
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
VCCB NC
24
23
OE
22
B0
21
B1
20
B2
19
B3
18
B4
17
B5
16
B6
15
B7
14
GND
13
DT SUFFIX
24–LEAD PLASTIC TSSOP PACKAGE
CASE 948H–01
PIN NAMES
Pins
OE
T/R
A0–A7
B0–B7
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
1
2
3
A0
4
A1
5
A2
6
A3
7
A4
8
A5
9
A6
10
A7
11
12
VCCA T/R
GND GND
Figure 1. 24–Lead Pinout
(Top View)
This document contains information on a new product. Specifications and information herein are subject to
change without notice.
7/97
©
Motorola, Inc. 1997
70
REV 1
MC74LVXC3245
OE 22
T/R 2
3
21
A1
4
20
A2
5
19
A3
6
18
A4
7
17
A5
8
16
A6
9
15
A7
10
14
A0
B0
B1
B2
B3
B4
B5
B6
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
LVX Data — Low–Voltage CMOS Logic
BR1492 — Rev 0
71
MOTOROLA
MC74LVXC3245
ABSOLUTE 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
* Absolute maximum continuous 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.
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 3.0V, 4.5V, 5.5V
VCCA
VCCB
OE, T/R
An
Bn
Min
2.7
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
2.7
3.0
3.6
2.7
3.0
3.6
2.7
3.0
3.6
2.7
3.0
3.6
3.0
3.0
3.0
2.7
2.7
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
≤
0.1V
or
≥
VCC – 0.1V
V
V
VILB
VOUT
≤
0.1V
or
≥
VCC – 0.1V
V
IOUT = –100µA
IOH = –12mA
IOH = –24mA
IOH = –12mA
IOH = –24mA
IOUT = –100µA
IOH = –12mA
IOH = –24mA
IOH = –24mA
V
VOHB
V
MOTOROLA
72
LVX Data — Low–Voltage CMOS Logic
BR1492 — Rev 0
MC74LVXC3245
DC ELECTRICAL CHARACTERISTICS
TA = 25°C
Symbol
VOLA
Parameter
Maximum LOW Level
Output Voltage
Condition
IOUT = 100µA
IOL = 24mA
IOL = 12mA
IOL = 24mA
IOUT = 100µA
IOL = 24mA
IOL = 24mA
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–2.1V
VI=VCC–0.6V
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 Voltage
Notes 1., 3.
Notes 1., 3.
Max LOW Level
Dynamic Input Voltage
Notes 1., 3.
Notes 1., 3.
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
V
V
V
ICCB
Quiescent VCCB Supply
Current
VOLPA
VOLPB
VOLVA
VOLVB
VIHDA
VIHDB
VILDA
VILDB
Quiet Output Max
Dynamic VOL
1. Worst case package.
2. Max number of outputs defined as (n). Data inputs are driven 0V to VCC level; one output at GND.
3. 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 = 1MHz.
LVX Data — Low–Voltage CMOS Logic
BR1492 — Rev 0
73
MOTOROLA
MC74LVXC3245
AC ELECTRICAL CHARACTERISTICS
TA = –40 to +85°C; CL = 50pF
VCCA = 2.7–3.6V
VCCB = 4.5–5.5V
Symbol
tPHL
tPLH
tPHL
tPLH
tPZL
tPZH
tPZL
tPZH
tPHZ
tPLZ
tPHZ
tPLZ
Parameter
Propagation Delay A to B
Propagation Delay B to A
Output Enable Time OE to B
Output Enable Time OE to A
Output Disable Time OE to B
Output Disable Time OE to A
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Typ
(Note 4.)
4.8
3.9
3.8
4.3
4.7
4.8
5.9
5.4
4.0
3.8
4.6
3.1
Max
8.5
7.0
7.0
8.0
8.5
9.0
10.0
9.5
8.5
8.0
10.0
7.0
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
VCCA = 2.7–3.6V
VCCB = 3.0–3.6V
Typ
(Note 5.)
5.5
5.2
4.4
5.1
6.0
6.1
6.4
5.8
6.3
4.5
5.2
3.4
Max
9.0
8.5
7.5
8.0
9.5
10.0
10.5
9.5
10.0
8.5
10.0
7.0
Unit
ns
ns
ns
ns
ns
ns
tOSHL
Output to Output Skew, Data to Output
ns
1.0
1.5
1.0
1.5
tOSLH
(Note 5.)
4. Typical values at VCCA = 3.3V, VCCB = 5.0V at 25°C.
5. Typical values at VCCA = 3.3V, VCCB = 3.3V at 25°C.
6. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH–to–LOW (tOSHL) or LOW–to–HIGH (tOSLH); parameter
guaranteed by design.
CAPACITIVE CHARACTERISTICS
Symbol
CIN
CI/O
CPD
Parameter
Input Capacitance
Input/Output Capacitance
Power Dissipation Capacitance
(Measured at 10MHz)
A B
B A
Condition
VCCA = 3.3V; VCCB = 5.0V
VCCA = 3.3V; VCCB = 5.0V
VCCB = 5.0V
VCCA = 3.3V
Typical
4.5
10
50
40
Unit
pF
pF
pF
MOTOROLA
74
LVX Data — Low–Voltage CMOS Logic
BR1492 — Rev 0
微控制器 MCU
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