IDT74LVCC3245A
CMOS OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT
INDUSTRIAL TEMPERATURE RANGE
CMOS OCTAL BUS
IDT74LVCC3245A
TRANSCEIVER WITH ADJUSTABLE
OUTPUT VOLTAGE, 3-STATE OUT-
PUTS, 5 VOLT TOLERANT I/O
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FEATURES:
0.5 MICRON CMOS Technology
V
CCA
= 2.3V to 3.6V
V
CCB
= 3V 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 SOIC, SSOP, QSOP, and TSSOP packages
DRIVE FEATURES:
• High Output Drivers: ±24mA
• Reduced system switching noise
APPLICATIONS:
The LVCC3245A is manufactured using advanced dual metal CMOS
technology. This 8-bit (octal) noninverting bus transceiver contains two
separate supply rails. The B port is designed to track V
CCB
, which accepts
voltages from 3V to 5.5V, and the A port is designed to track V
CCA
, which
operates at 2.3V to 3.6V. This allows for translation from a 3.3V to a 5V
system environment and vice-versa, or from a 2.5V to a 3.3V system
environment, and vice-versa.
This LVCC3245A 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 LVCC3245A has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
DESCRIPTION:
• 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
2.3V to 3.6V Port
A
3
5
19
6
18
7
17
8
16
B
3
3V to 5.5V Port
A
4
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
© 2000 Integrated Device Technology, Inc.
JULY 2000
DSC-4704/3
IDT74LVCC3245A
CMOS OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
FOR V
CCB
OR V
CCB
(1)
Symbol
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
(2.3V to 3.6V) 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 5.5V)
NC
OE
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
GND
V
TERM
T
STG
I
OUT
I
IK
I
OK
I
CC
I
SS
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.
4.5
11
Unit
pF
pF
SOIC/ 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
IDT74LVCC3245A
CMOS OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT
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
= 2.3V to 3.6V
(1)
Symbol
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
I
OFF
V
H
I
CCL
I
CCH
I
CCZ
∆I
CC
High Impedance Output Current
(3-State Output pins)
Input/Output Power Off Leakage
Input Hysteresis
Quiescent Power Supply Current
V
CCA
= 0V, V
IN
or V
O
≤
5.5V
V
CCA
= 3.3V
V
CCA
= 3.6V
V
IN
= GND or V
CC
—
—
—
—
100
—
±50
—
50
µA
mV
µA
V
CCA
= 3.6V
V
O
= V
CCA
or GND
—
—
±5
µA
Parameter
Input HIGH Voltage Level
Input LOW Voltage Level
Input Leakage Current
V
CCA
= 3.6V
V
OB
≤
0.1V
V
OB
≥
V
CCB
- 0.1V
Test Conditions
V
CCA
= 2.3V, V
CCB
= 3V
V
CCA
= 2.7V to 3.6V
V
CCA
= 2.3V, V
CCB
= 3V
V
CCA
= 2.7V to 3.6V
V
I
= 0 to 5.5V
Min.
1.7
2
—
—
—
Typ.
(2)
—
—
—
—
—
Max.
—
—
0.7
0.8
±1
µA
V
Unit
V
Quiescent Power Supply Current
Variation
One input at V
CCA
- 0.6, other inputs at V
CCA
or GND
—
—
500
µA
NOTES:
1. V
CCB
= 3V to 5.5V.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3. This applies in the disabled state only.
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
= 3V to 5.5V
(1)
Symbol
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
I
OFF
V
H
I
CCL
I
CCH
I
CCZ
∆I
CC
High Impedance Output Current
(3-State Output pins)
Input/Output Power Off Leakage
Input Hysteresis
Quiescent Power Supply Current
V
CCB
= 0V, V
IN
or V
O
≤
5.5V
V
CCB
= 3.3V
V
CCB
= 3.6V
V
CCB
= 5.5V
V
IN
= GND or V
CC
—
—
—
—
—
—
100
—
—
—
±50
—
50
80
1.5
µA
mV
µA
V
CCB
= 3.6V
V
O
= V
CCB
or GND
—
—
±5
µA
Parameter
Input HIGH Voltage Level
Input LOW Voltage Level
Input Leakage Current
V
CCB
= 3.6V
V
OA
≤
0.1V
V
OA
≥
V
CCA
- 0.1V
Test Conditions
V
CCB
= 3V to 3.6V
V
CCB
= 5.5V
V
CCB
= 3V to 3.6V
V
CCB
= 5.5V
V
I
= 0 to 5.5V
Min.
2
3.85
—
—
—
Typ.
(2)
—
—
—
—
—
Max.
—
—
0.8
1.65
±1
µA
V
Unit
V
Quiescent Power Supply Current
Variation
One input at V
CCB
- 2.1 other inputs at V
CCB
or GND
mA
NOTES:
1. V
CCA
= 2.3V to 3.6V.
2. Typical values are at V
CC
= 3.3V, +25°C ambient.
3. This applies in the disabled state only.
3
IDT74LVCC3245A
CMOS OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS, V
CCA
= 2.3V TO 3.6V (A PORT)
Symbol
V
OHA
Parameter
Output HIGH Voltage
(B port to A port)
V
CCA
= 3V
V
CCA
= 2.3V
V
CCA
= 2.7V
V
CCA
= 3V
V
CCA
= 3V
V
CCA
= 2.7V
V
OLA
Output LOW Voltage
(B port to A port)
V
CCA
= 3V
V
CCA
= 2.3V
V
CCA
= 2.7V
V
CCA
= 3V
V
CCA
= 2.7V
Test Conditions
(1)
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 4.5V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 4.5V
I
OL
= 0.1mA
I
OL
= 8mA
I
OL
= 12mA
I
OL
= 24mA
I
OH
= – 24mA
I
OH
= – 0.1mA
I
OH
= – 8mA
I
OH
= – 12mA
Min.
2.9
2
2.2
2.4
2.2
2
—
—
—
—
—
Max.
—
—
—
—
—
—
0.1
0.6
0.5
0.5
0.5
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
CCB
= 3V to 5.5V.
OUTPUT DRIVE CHARACTERISTICS, V
CCB
= 3V TO 5.5V (B PORT)
Symbol
V
OHB
Parameter
Output HIGH Voltage
(A port to B port)
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 4.5V
V
OLB
Output LOW Voltage
(A port to B port)
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 3V
V
CCB
= 4.5V
Test Conditions
(1)
V
CCA
= 3V
V
CCA
= 2.3V
V
CCA
= 2.7V
V
CCA
= 3V
V
CCA
= 2.7V
V
CCA
= 3V
V
CCA
= 2.3V
V
CCA
= 3V
V
CCA
= 3V
I
OL
= 0.1mA
I
OL
= 12mA
I
OL
= 24mA
I
OH
= – 24mA
I
OH
= – 0.1mA
I
OH
= – 12mA
Min.
2.9
2.4
2.4
2.2
3.2
—
—
—
—
Max.
—
—
—
—
—
0.1
0.4
0.5
0.5
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
= 2.3V to 3.6V.
OPERATING CHARACTERISTICS, T
A
= 25°C
V
CCA
= 3.3V, V
CCB
= 5V
Symbol
C
PD
C
PD
Parameter
Power Dissipation Capacitance per Transceiver Outputs enabled A to B
Power Dissipation Capacitance per Transceiver Outputs disabled B to A
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
38
36.5
Unit
pF
4
IDT74LVCC3245A
CMOS OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS
(1)
V
CCA
= 2.5V ± 0.2V
V
CCB
= 3.3V ± 0.3V
Symbol
t
PHL
t
PLH
t
PHL
t
PLH
t
PZL
t
PLZ
t
PZL
t
PLZ
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.
9.4
9.1
11.2
9.9
13
12.8
14.5
12.9
7.1
6.9
8.8
8.9
V
CCA
= 2.7V to 3.6V
V
CCB
= 5V ± 0.5V
V
CCB
= 3.3V ± 0.3V
Min.
1
1
1
1
1
1
1
1
1
1
1
1
Max.
6
5.3
5.8
7
8.1
8.4
9.2
9.5
5.5
7.8
7.3
7
Min.
1
1
1
1
1
1
1
1
1
1
1
1
Max.
7.1
7.2
6.4
7.6
9.2
9.9
9.7
9.5
6.6
6.9
7.5
7.9
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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