IDT74LVCC4245A
CMOS OCTAL DUAL-SUPPLY BUS TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
CMOS OCTAL DUAL-SUPPLY
IDT74LVCC4245A
BUS TRANSCEIVER WITH
CONFIGURABLE OUTPUT VOLTAGE,
3-STATE OUTPUTS, 3.3V AND 5V I/O
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•
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FEATURES:
0.5 MICRON CMOS Technology
V
CCA
= 5V ± 0.5V
V
CCB
= 2.7V to 5.5V
CMOS power levels (0.4µ W typ. static)
µ
Rail-to-rail output swing for increased noise margin
All inputs, outputs, and I/O are 5V tolerant
Supports hot insertion
Available in SSOP, QSOP, and TSSOP packages
DESCRIPTION:
DRIVE FEATURES:
• High Output Drivers: ±24mA
• Reduced system switching noise
The LVCC4245A is manufactured using advanced dual metal CMOS
technology. This 8-bit (octal) noninverting bus transceiver contains two
separate power-supply rails. The configurable B port is designed to track
V
CCB
, which accepts voltages from 3V to 5V, and the A port is dedicated to
accept a 5V supply level. This allows for translation from a 3.3V to a 5V
system environment and vice-versa.
This LVCC4245A is ideal for asynchronous communication between two
data buses (A and B). The device transmits data from A to B or from B to
A, depending on the logic level at the direction-control (DIR) input. The
output-enable (OE) input can be used to disable the device so the buses are
effectively isolated.
The LVCC4245A has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
APPLICATIONS:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
FUNCTIONAL BLOCK DIAGRAM
DIR
2
22
OE
A
1
3
21
4
20
B
1
A
2
B
2
A
3
5
19
6
18
7
17
8
16
B
3
3V to 5V Port
A
4
5V Port
B
4
A
5
B
5
A
6
B
6
A
7
9
15
10
B
7
A
8
14
B
8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
© 2004 Integrated Device Technology, Inc.
JANUARY 2004
DSC-5166/2
IDT74LVCC4245A
CMOS OCTAL DUAL-SUPPLY BUS TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
(5V) V
CCA
DIR
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CCB
(3V to 5V)
NC
OE
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
GND
ABSOLUTE MAXIMUM RATINGS
FOR V
CCB
OR V
CCB
(1)
Symbol
V
TERM
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
Description
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Continuous Clamp Current,
V
I
< 0 or V
O
< 0
Continuous Current through each
V
CC
or GND
Max
–0.5 to +6
–65 to +150
–50 to +50
–50
±100
Unit
V
°C
mA
mA
mA
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
CAPACITANCE
(T
A
= +25°C, F = 1.0MHz)
Symbol
C
IN
C
I/O
Parameter
(1)
Input Capacitance
I/O Port Capacitance
Conditions
V
IN
= 0V
V
IN
= 0V
Typ.
5
11
Max.
—
—
Unit
pF
pF
SSOP/ QSOP/ TSSOP
TOP VIEW
NOTE:
1. As applicable to the device type.
PIN DESCRIPTION
Pin Names
OE
DIR
Ax
Bx
NC
Description
Output Enable Input (Active LOW)
Direction Control Input
Port A Inputs or 3-State Outputs
Port B Inputs or 3-State Outputs
No Internal Connection
FUNCTION TABLE
(1)
Inputs
OE
L
L
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
DIR
L
H
X
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
High Z state
2
IDT74LVCC4245A
CMOS OCTAL DUAL-SUPPLY BUS TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (A PORT)
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= –40°C to +85°C, V
CCA
= 4.5V to 5.5V
(1)
Symbol
V
IH
Parameter
Input HIGH Voltage Level
Test Conditions
V
CCA
= 4.5V, V
CCB
= 2.7V
V
CCA
= 4.5V, V
CCB
= 3.6V
V
CCA
= 5.5V, V
CCB
= 5.5V
V
CCA
= 4.5V, V
CCB
= 2.7V
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
H
I
CCL
I
CCH
∆I
CC
Quiescent Power Supply Current Variation
NOTES:
1. V
CCB
= 2.7V to 5.5V unless otherwise noted.
2. Typical values are at V
CCA
= 5V, +25°C ambient.
Min.
2
2
2
—
—
—
Typ.
(2)
—
—
—
—
—
—
—
—
100
—
—
Max.
—
—
—
0.8
0.8
0.8
±1
±5
—
80
1.5
Unit
V
V
OB
≤
0.1V or
V
OB
≥
V
CCB
– 0.1V
Input LOW Voltage Level
Input Leakage Current
(Control Inputs)
High Impedance Output Current
(3-State Output pins)
Input Hysteresis
Quiescent Power Supply Current
V
CCA
= 4.5V, V
CCB
= 3.6V
V
CCA
= 5.5V, V
CCB
= 5.5V
V
CCA
= 5.5V
V
CCB
= 3.6V or 5.5V
V
CCA
= 5.5V
V
CCB
= 3.6V
V
CCA
= 5.0V
V
CCA
= 5.5V
V
CCB
= 3.6V or 5.5V
V
IN
= GND or V
CCA
I
OB
= 0
V
I
= 0 to 5.5V
V
O
= 0 to 5.5V
V
µA
µA
mV
µA
mA
—
—
—
—
—
One input at 3.4V, other inputs at V
CCA
or GND
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (B PORT)
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: T
A
= –40°C to +85°C, V
CCB
= 2.7V to 5.5V
(1)
Symbol
V
IH
Parameter
Input HIGH Voltage Level
Test Conditions
V
CCB
= 2.7V, V
CCA
= 4.5V
V
CCB
= 3.6V, V
CCA
= 4.5V
V
CCB
= 5.5V, V
CCA
= 5.5V
V
CCB
= 2.7V, V
CCA
= 4.5V
V
OA
≤
0.1V or
V
OA
≥
V
CCA
– 0.1V
Min.
2
2
3.85
—
—
—
Typ.
(2)
—
—
—
—
—
—
—
100
—
—
Max.
—
—
—
0.8
0.8
1.65
±5
—
80
500
Unit
V
V
IL
I
OZH
I
OZL
V
H
I
CCL
I
CCH
∆I
CC
Input LOW Voltage Level
High Impedance Output Current
(3-State Output pins)
Input Hysteresis
Quiescent Power Supply Current
Quiescent Power Supply Current Variation
V
CCB
= 3.6V, V
CCA
= 4.5V
V
CCB
= 5.5V, V
CCA
= 5.5V
V
CCB
= 3.6V
V
CCA
= 5.5V
V
CCB
= 3.3V
V
CCB
= 3.6V or 5.5V
V
CCA
= 5.5V
V
IN
= GND or V
CCB
I
OA
= 0
V
O
= 0 to 5.5V
V
µA
mV
µA
µA
—
—
—
—
One input at V
CCB
- 0.6V, other inputs at V
CCB
or GND
NOTES:
1. V
CCA
= 4.5V to 5.5V unless otherwise noted.
2. Typical values are at V
CCB
= 3.3V, +25°C ambient.
3
IDT74LVCC4245A
CMOS OCTAL DUAL-SUPPLY BUS TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS (A PORT)
Symbol
V
OH
V
OL
Parameter
Output HIGH Voltage
(B port to A port)
Output LOW Voltage
(B port to A port)
V
CCA
= 4.5V
V
CCB
= 3V
V
CCA
= 4.5V
Test Conditions
(1)
V
CCB
= 3V
I
OH
= – 0.1mA
I
OH
= – 24mA
I
OL
= 0.1mA
I
OL
= 24mA
Min.
4.4
3.76
—
—
Max.
—
—
0.1
0.44
V
Unit
V
NOTE:
1. V
IH
and V
IL
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate V
CC
range.
T
A
= – 40°C to + 85°C.
OUTPUT DRIVE CHARACTERISTICS (B PORT)
Symbol
V
OH
Parameter
Output HIGH Voltage
(A port to B port)
V
CCB
= 3V
V
CCB
= 2.7V
V
CCB
= 3V
V
CCB
= 2.7V
V
CCB
= 3V
V
CCB
= 4.5V
V
OL
Output LOW Voltage
(A port to B port)
V
CCB
= 3V
V
CCB
= 2.7V
V
CCB
= 2.7V
V
CCB
= 3V
V
CCB
= 4.5V
Test Conditions
(1)
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
V
CCA
= 4.5V
I
OL
= 0.1mA
I
OL
= 12mA
I
OL
= 24mA
I
OH
= – 24mA
I
OH
= – 0.1mA
I
OH
= – 12mA
Min.
2.9
2.2
2.46
2.1
2.25
3.76
—
—
—
—
—
Max.
—
—
—
—
—
—
0.1
0.44
0.5
0.44
0.44
V
Unit
V
NOTE:
1. V
IH
and V
IL
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate V
CC
range.
T
A
= – 40°C to + 85°C, V
CCA
= 4.5V.
OPERATING CHARACTERISTICS, T
A
= 25°C
V
CCA
= 5V, V
CCB
= 3.3V
Symbol
C
PD
C
PD
Parameter
Power Dissipation Capacitance per Transceiver Outputs enabled
Power Dissipation Capacitance per Transceiver Outputs disabled
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
20
6.5
Unit
pF
4
IDT74LVCC4245A
CMOS OCTAL DUAL-SUPPLY BUS TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS
(1)
V
CCA
= 5V ± 0.5V
V
CCB
= 5V ± 0.5V
Symbol
t
PLH
t
PHL
t
PLH
t
PHL
t
PZL
t
PZH
t
PZL
t
PZH
t
PLZ
t
PHZ
t
PLZ
t
PHZ
Parameter
Propagation Delay
Ax to Bx
Propagation Delay
Bx to Ax
Output Enable Time
OE
to Bx
Output Enable Time
OE
to Ax
Output Disable Time
OE
to Ax
Output Disable Time
OE
to Bx
Min.
1
1
1
1
1
1
1
1
1
1
1
1
Max.
7.1
6
6.8
6.1
8.2
8.1
9
8.3
4.7
4.9
5.4
6.3
1
1
1
1
1
1
1
1
1
1
1
1
V
CCB
= 2.7V to 3.6V
Min.
Max.
7
7
6.2
5.3
10
10.2
9
8
5.2
5.2
5.4
7.4
ns
ns
ns
ns
ns
Unit
ns
NOTE:
1. See TEST CIRCUITS AND WAVEFORMS. T
A
= – 40°C to + 85°C.
5
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