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
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)
Rail-to-Rail output swing for increased noise margin
All inputs, outputs and I/O are 5 Volt tolerant
Supports hot insertion
Available in SOIC, SSOP, QSOP, and TSSOP packages
DESCRIPTION:
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.
Drive Features for LVCC4245A:
– High Output Drivers:
±24mA
– Reduced system switching noise
APPLICATIONS:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
FUNCTIONAL BLOCK DIAGRAM
2
D IR
22
3
21
4
20
5
19
6
18
7
17
8
16
9
15
OE
A
1
B
1
A
2
B
2
A
3
B
3
A
4
B
4
A
5
B
5
A
6
B
6
A
7
B
7
A
8
10
14
B
8
INDUSTRIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
3V to 5V P ort
5V P ort
JULY 2000
DSC-5166/-
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
SO24-2
SO24-7
SO24-8
SO24-9
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
CCA
(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
ABSOLUTE MAXIMUM RATINGS
FOR
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
SOIC/ SSOP/ QSOP/ TSSOP
TOP VIEW
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
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 = 1.0MH
Z
)
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
FUNCTION TABLE
(1)
Inputs
OE
L
L
H
DIR
L
H
X
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
NOTE:
1. As applicable to the device type.
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
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
V
CCA
Test Conditions
= 4.5V, V
CCB
= 2.7V V
OB
< 0.1V or
V
OB
> V
CCB
– 0.1V
Min.
2
2
2
—
—
—
V
I
= 0 to 5.5V
V
O
= 0 to 5.5V
—
—
—
—
—
Typ.
(2)
—
—
—
—
—
—
—
—
100
—
—
Max.
—
—
—
0.8
0.8
0.8
±1
±5
—
80
1.5
µA
µA
mV
µA
mA
V
Unit
V
V
CCA
= 4.5V, V
CCB
= 3.6V
V
CCA
= 5.5V, V
CCB
= 5.5V
V
IL
Input LOW Voltage Level
V
CCA
= 4.5V, V
CCB
= 2.7V
V
CCA
= 4.5V, V
CCB
= 3.6V
V
CCA
= 5.5V, V
CCB
= 5.5V
I
IH
I
IL
I
OZH
I
OZL
V
H
I
CCL
I
CCH
∆I
CC
Input Leakage Current
(Control Inputs)
High Impedance Output Current
(3-State Output pins)
Input Hysteresis
Quiescent Power Supply Current
Quiescent Power Supply Current Variation
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
IN
= GND or V
CCA
V
CCB
= 3.6V or 5.5V
I
OB
= 0
One input at 3.4V, other inputs at V
CCA
or GND
NOTES:
1. V
CCB
= 2.7V to 5.5V unless otherwise noted.
2. Typical values are at V
CCA
= 5.0V, +25°C ambient.
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
V
CCB
Test Conditions
= 2.7V, V
CCA
= 4.5V V
OA
< 0.1V or
V
OA
> V
CCA
– 0.1V
Min.
2
2
3.85
—
—
—
V
O
= 0 to 5.5V
—
—
—
—
Typ.
(2)
—
—
—
—
—
—
—
100
—
—
Max.
—
—
—
0.8
0.8
1.65
±5
—
80
500
µA
mV
µA
µA
V
Unit
V
V
CCB
= 3.6V, V
CCA
= 4.5V
V
CCB
= 5.5V, V
CCA
= 5.5V
V
IL
Input LOW Voltage Level
V
CCB
= 2.7V, V
CCA
= 4.5V
V
CCB
= 3.6V, V
CCA
= 4.5V
V
CCB
= 5.5V, V
CCA
= 5.5V
I
OZH
I
OZL
V
H
I
CCL
I
CCH
∆I
CC
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
= 5.5V
V
CCB
= 3.3V
V
CCB
= 3.6V or 5.5V
V
IN
= GND or V
CCB
V
CCA
= 5.5V
I
OA
= 0
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
I
OH
= – 0.1mA
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
= – 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, TA = 25°C
V
CCA
= 5V
V
CCB
= 3.3V
Symbol
Parameter
C
PD
Power Dissipation Capacitance per transceiver Outputs Enabled
C
PD
Power Dissipation Capacitance per transceiver Outputs Disabled
Test Conditions
C
L
= 0pF, f = 10Mhz
Typical
20
6.5
Unit
pF
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
PHL
t
PLH
t
PHL
t
PLH
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
Min.
1
1
1
1
1
1
1
1
1
1
1
1
V
CCB
= 2.7V to 3.6V
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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