IDT IDT74LVC4245A Cmos octal bus transceiver and 3.3v to 5v shifter with 3-state out-puts and 5 volt tolerant i/o Datasheet

IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
CMOS OCTAL BUS
TRANSCEIVER AND 3.3V TO 5V
SHIFTER WITH 3-STATE OUTPUTS AND 5 VOLT TOLERANT I/O
DESCRIPTION:
FEATURES:
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IDT74LVC4245A
The LVC4245A is manufactured using advanced dual metal CMOS
technology. This octal noninverting bus transceiver contains two separate
supply rails; B port has VCCB, which is set at 3.3V, and A port has VCCA, which
is set at 5V. This allows for translation from a 3.3V to a 5V environment, and
vice-versa.
This device is ideal for asynchronous communication between two buses
(A and B). The direction control pin (DIR) controls the direction of data flow.
The output enable pin (OE) overrides the direction control and disables both
ports. All inputs are designed with hysteresis for improved noise margin.
The LVC4245A has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining
speed performance.
0.5 MICRON CMOS Technology
VCCA = 5V ± 0.5V
VCCB = 2.7V to 3.6V
µ W typ. static)
CMOS power levels (0.4µ
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:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
FUNCTIONAL BLOCK DIAGRAM
2
22
A1
21
A2
B6
9
5V Port
15
A8
B5
8
16
A7
B4
7
17
A6
B3
6
18
A5
B2
5
19
A4
B1
4
20
A3
OE
3
3.3V Port
DIR
B7
10
14
B8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
JULY 2000
1
© 2000 Integrated Device Technology, Inc.
DSC-4754/1
IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
FOR VCCB OR VCCB(1)
(5V) VCCA
1
24
VCCB (3.3V)
DIR
2
23
VCCB (3.3V)
A1
3
22
OE
A2
4
21
B1
A3
5
20
B2
A4
6
19
B3
A5
7
18
B4
A6
8
17
B5
A7
9
16
B6
A8
10
15
B7
GND
11
14
B8
GND
12
13
GND
Symbol
Description
Max
Unit
VTERM
Terminal Voltage with Respect to GND
–0.5 to +6.5
V
TSTG
Storage Temperature
–65 to +150
°C
IOUT
DC Output Current
–50 to +50
mA
IIK
IOK
Continuous Clamp Current,
VI < 0 or VO < 0
–50
mA
ICC
ISS
Continuous Current through each
VCC or GND
±100
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 (TA = +25°C, F = 1.0MHz)
Parameter(1)
Symbol
CIN
Input Capacitance
Conditions
Typ.
Max.
Unit
VIN = 0V or VCCA
5
—
pF
11
—
pF
11
—
pF
VCCA = Open
CI/O
I/O Port
Capacitance(2)
VOUT = VCCA or GND
VCCA = 5V
SOIC/ SSOP/ QSOP/ TSSOP
TOP VIEW
I/O Port Capacitance(3) VIN = VCCB or GND
CI/O
VCCB = 3.3V
NOTES:
1. As applicable to the device type.
2. For A port only.
3. For B port only.
PIN DESCRIPTION
Pin Names
Description
Output Enable Input (Active LOW)
OE
DIR
Direction Control Input
Ax
Port A Inputs or 3-State Outputs
Bx
Port B Inputs or 3-State Outputs
FUNCTION TABLE(1)
Inputs
OE
Outputs
L
L
Bus B Data to Bus A
L
H
Bus A Data to Bus B
H
X
High Z state
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
2
DIR
IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (A PORT)
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: TA = –40°C to +85°C, VCCA = 5V ± 0.5V(1)
Symbol
Parameter
Test Conditions
Min.
Typ.(2)
Max.
Unit
2
—
—
V
VIH
Input HIGH Voltage Level
VCCA = 4.5V to 5.5V
VIL
Input LOW Voltage Level
VCCA = 4.5V to 5.5V
—
—
0.8
V
IIH
Input Leakage Current
VCCA = 5.5V
VI = 0 to 5.5V
—
—
±1
µA
IOZH
High Impedance Output Current
VCCA = 5.5V
VO = 0 to 5.5V
—
—
±5
µA
IOZL
(3-State Output pins)
VH
ICCL
ICCH
ICCZ
∆ICC
Input Hysteresis
Quiescent Power Supply Current
VCCA = 5V
VCCA = 5.5V
VIN = GND or VCCA
—
—
100
—
—
80
mV
µA
Quiescent Power Supply Current
Variation
One input at 3.4V, other inputs at VCCA or GND
VCCA = 4.5V to 5.5V
—
—
1.5
mA
IIL
NOTES:
1. VCCB = 2.7V to 3.6V.
2. Typical values are at VCCA = 5V, +25°C ambient.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (B PORT)
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: TA = –40°C to +85°C, VCCB = 2.7V to 3.6V(1)
Symbol
Parameter
Test Conditions
Min.
Typ.(2)
Max.
Unit
VIH
Input HIGH Voltage Level
VCCB = 2.7V to 3.6V
2
—
—
V
VIL
Input LOW Voltage Level
VCCB = 2.7V to 3.6V
—
—
0.8
V
IOZH
High Impedance Output Current
VCCB = 3.6V
VO = 0 to VCCB
—
—
±5
µA
IOZL
(3-State Output pins)
VH
ICCL
ICCH
ICCZ
∆ICC
Input Hysteresis
Quiescent Power Supply Current
VCCB = 3.3V
VCCB = 3.6V
VIN = GND or VCCB
—
—
100
—
—
50
mV
µA
Quiescent Power Supply Current
Variation
One input at VCCB - 0.6V, other inputs at VCCB or GND
VCCB = 2.7V to 3.6V
—
—
500
µA
NOTES:
1. VCCA = 5V ± 0.5V.
2. Typical values are at VCCB = 3.3V, +25°C ambient.
3
IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS, VCCA = 5V ± 0.5V (A PORT)
Symbol
VOH
Test Conditions(1)
Parameter
Output HIGH Voltage
VCCA = 4.5V
(B Port to A Port)
VCCA = 5.5V
IOH = – 0.1mA
VCCA = 4.5V
IOH = – 24mA
VCCA = 5.5V
VOL
Output LOW Voltage
(B Port to A Port)
VCCA = 4.5V
IOL = 0.1mA
VCCA = 5.5V
VCCA = 4.5V
IOL = 24mA
VCCA = 5.5V
Min.
Max.
Unit
4.3
—
V
5.3
—
3.7
—
4.7
—
—
0.2
—
0.2
—
0.55
—
0.55
V
NOTE:
1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range.
TA = – 40°C to + 85°C, VCCB = 2.7V to 3.6V.
OUTPUT DRIVE CHARACTERISTICS, VCCB = 2.7V TO 3.6V (B PORT)
Symbol
VOH
Test Conditions(1)
Parameter
Output HIGH Voltage
(A Port to B Port)
Max.
Unit
V
VCCB = 2.7V to 3.6V
IOH = – 0.1mA
VCC – 0.2
—
VCCB = 2.7V
IOH = – 12mA
2.2
—
2.4
—
VCCB = 3V
VOL
Min.
VCCB = 3V
IOH = – 24mA
2
—
Output LOW Voltage
VCCB = 2.7V to 3.6V
IOL = 0.1mA
—
0.2
(A Port to B Port)
VCCB = 2.7V
IOL = 12mA
—
0.4
VCCB = 3V
IOL = 24mA
—
0.55
V
NOTE:
1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range.
TA = – 40°C to + 85°C, VCCA = 5V ± 0.5V.
OPERATING CHARACTERISTICS, TA = 25°C
VCCA = 5V, VCCB = 3.3V
Symbol
Parameter
CPD
Power Dissipation Capacitance per Transceiver Outputs enabled
CPD
Power Dissipation Capacitance per Transceiver Outputs disabled
Test Conditions
Typical
Unit
CL = 0pF, f = 10Mhz
39.5
pF
5
4
IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS(1)
VCCA = 5V ± 0.5V
VCCB = 2.7V to 3.6V
Symbol
Parameter
Min.
Max.
Unit
ns
tPLH
Propagation Delay
1
6.3
tPHL
Ax to Bx
1
6.7
tPLH
Propagation Delay
1
6.1
tPHL
Bx to Ax
1
5
tPZL
Output Enable Time
1
8.8
tPLZ
OE to Bx
1
9.8
tPZL
Output Enable Time
1
9
tPLZ
OE to Ax
1
8.1
tPLZ
Output Disable Time
1
7.7
tPHZ
OE to Bx
1
7.8
tPLZ
Output Disable Time
1
7
tPHZ
OE to Ax
1
5.8
NOTE:
1. See TEST CIRCUITS AND WAVEFORMS. TA = – 40°C to + 85°C.
5
ns
ns
ns
ns
ns
IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
LOAD CIRCUIT AND VOLTAGE WAVEFORMS
PARAMETER MEASUREMENT INFORMATION (A PORT)
TEST CONDITIONS
500Ω
S1
From Output
Under Test
CL = 50pF
(see Note A)
TEST
2 x VCC
Open
GND
S1
tPLH / tPHL
Open
tPLZ / tPZL
2 x VCC
tPHZ / tPZH
GND
500Ω
Load Circuit
tW
Input
1.5V
3V
Output
Control
VCC
1.5V
1.5V
1.5V
0V
0V
tPZL
Output
Waveform 1
S1 at 2 X VCC
(see Note B)
Voltage Waveforms Pulse Duration
Output
Waveform 2
S1 at GND
(see Note B)
tPLZ
50% VCC
tPZH
tPHZ
50% VCC
VCC
1.5V
Input
1.5V
Voltage Waveforms Enable and Disable Times
Low- and High-Level Enabling
0V
tPHL
tPLH
VOH
Output
50% VCC
50% VCC
VOL
Voltage Waveforms Propagation Delay Times
Noninverting Outputs
NOTES:
A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control.
C . All input pulses are supplied by generators having the following characteristics: PRR ≤ 10MHz; Zo = 50Ω; tF ≤ 2.5ns; tR ≤ 2.5ns.
D. The outputs are measured one at a time with one transition per measurement.
6
VCC
VOL+0.3V
VOL
VOH
VOH-0.3V
0V
IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
LOAD CIRCUIT AND VOLTAGE WAVEFORMS
PARAMETER MEASUREMENT INFORMATION (B PORT)
TEST CONDITIONS
500Ω
S1
From Output
Under Test
CL = 50pF
(see Note A)
7V
Open
GND
TEST
S1
tPLH / tPHL
Open
tPLZ / tPZL
7V
tPHZ / tPZH
GND
500Ω
Load Circuit
tW
Input
1.5V
3V
Output
Control
3V
1.5V
1.5V
1.5V
0V
0V
tPZL
tPLZ
Output
Waveform 1
S1 at 7V
(see Note B)
Voltage Waveforms Pulse Duration
Output
Waveform 2
S1 at GND
(see Note B)
1.5V
tPHZ
tPZH
1.5V
3V
1.5V
1.5V
Input
Voltage Waveforms Enable and Disable Times
Low- and High-Level Enabling
0V
tPHL
tPLH
VOH
Output
1.5V
1.5V
VOL
Voltage Waveforms Propagation Delay Times
Noninverting Outputs
NOTES:
A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control.
C . All input pulses are supplied by generators having the following characteristics: PRR ≤ 10MHz; Zo = 50Ω; tF ≤ 2.5ns; tR ≤ 2.5ns.
D. The outputs are measured one at a time with one transition per measurement.
7
3.5V
VOL+0.3V
VOL
VOH
VOH-0.3V
0V
IDT74LVC4245A
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
X
LVC
IDT
XX
XXXX
XX
Temp. Range
Bus-Hold Device Type Package
SO
PY
Q
PG
Small Outline IC (gull wing)
Shrink Small Outline Package
Quarter Size Small Outline Package
Thin Shrink Small Outline Package
4245A
Octal Bus Transceiver and 3.3V to 5V Shifter with 3-State
Outputs, ±24mA
Blank
No Bus-hold
74
–40°C to +85°C
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