PI74LVTC245H [PERICOM]
3.3V 8 BIT BIDIRECTIOANAL TRANCEIVER WITH 3 STATE OUTPUTS; 3.3V 8位BIDIRECTIOANAL TRANCEIVER带3态输出
| 型号： | PI74LVTC245H |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | 3.3V 8 BIT BIDIRECTIOANAL TRANCEIVER WITH 3 STATE OUTPUTS |
| 文件： | 总8页 (文件大小：187K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI74LVTC245
3.3V 8-Bit Bi-Directional Transceiver
with 3-State Outputs
ProductFeatures
ProductDescription
Pericom Semiconductor’s PI74LVTC series of logic circuits are
producedusingtheCompany’sadvancedCMOStechnology,achiev-
ing industry leading speed.
• Advanced low power CMOS design for 2.7V to 3.6V
V
operation
CC
• Supports 5V input/output tolerance in mixed signal mode
operation
ThePI74LVTC245isanon-inverting8-bitBidirectionalTransceiver
• Function compatible with LVT family of products
• Balanced ±24mA output drive
designed for low-voltage 2.7V to 3.6V V operation, with the
CC
capabilityofinterfacingtothe5Vsystemenvironment.Thistranceiver
is designed for asynchronous two-way communication between
data buses. The direction control input pin (DIR) determines the
• TypicalV
(OutputGroundBounce)<0.8VatV =3.3V,
CC
OLP
T =25°C
A
direction of the dataflow from the
A bus to the
• I and Power Up/Down 3-State support live insertion
off
B bus or from the B bus to the A bus. The output enable (OE) input,
when HIGH, disables both A and B ports by placing them in
HIGHZcondition.
• Latch-upperformanceexceeds200mAPerJESD78
• ESDprotectionexceedsJESD22
-2000VHuman-BodyModel(A114-B)
-200VMachineModel(A115-A)
When Vcc is between 0 to 1.5V during power up or power down, the
outputs of the device are in the high-impedance state. To ensure the
• Packages(Pb-freeavailable):
high-impedancestateabove1.5V,OEshouldbetiedtoV through
CC
-20-pin209-milwideplasticSSOP(H)
-20-pin173-milwideplasticTSSOP(L)
20-pin300-milwideplasticSOIC(S)
a pullup resistor; the minimum value of the resistor is determined by
the current sinking capability of the driver.
The device fully supports live-insertion with its I and power-up/
off
down 3-state. The I circuitry disables the outputs when the power
off
LogicBlockDiagram
is off, preventing the backflow of damaging current through
the device. Power-up/down 3-state places the outputs in the
high-impedance state during power up or power down, preventing
driverconflict.
DIR
OE
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
Product Pin Configuration
DIR
A0
1
2
3
4
5
6
7
8
9
10
VCC
OE
B0
B1
B2
B3
B4
B5
B6
B7
20
19
18
17
16
15
14
13
12
11
A1
A2
20-Pin
H,L,S
A3
A4
A5
A6
A7
GND
PS8691
07/01/03
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PI74LVTC245
3.3V,8-BitBi-DirectionalTranceiver
with3-StateOutputs
MaximumRatings
(Above which the useful life may be impaired.
For user guidelines, not tested.)
Product Pin Description
Supply voltage range, V ............................... –0.5Vto+6.5V
CC
Pin Name
Description
3-State Output Enable Inputs (Active LOW)
Direction Control Input
(1)
Input voltage range, V ................................. –0.5Vto+6.5V
I
OE
Voltage range applied to any output in the
(1)
high-impedance or power-off state, V
........ –0.5Vto+6.5V
O
DIR
xAx
xBx
Voltage range applied to any output in the
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
Ground
(1),(2)
active state, V
................................. –0.5VtoV +0.5V
CC
O
Input clamp current, I (V <0)..................................... –50mA
IK
I
Output clamp current, I (V <0) ............................... –50mA
OK
O
GND
VCC
Continous Output Current I ....................................... ±50mA
O
Power
Continous Current through each V or GND pin ............... ±100mA
CC
JA
(3)
Package thermal impedance, θ
:package H............ 81°C/W
package L ............. 84°C/W
package S ............. 84°C/W
Storage Temperature range, T ..................... –65°Cto150°C
stg
Notes:
Stresses greater than those listed under 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.
1. Inputnegative-voltageandoutputvoltageratingsmaybeexceededifthe
input and output clamp current ratings are observed.
2. This value is limited to 6.5 maximum
3.ThepackagethermalimpedanceiscalculatedinaccordancewithJESD51.
Truth Table(4)
Inputs
Outputs
OE
L
DIR
L
Bus B Data to Bus A
Bus A Data to Bus B
Z
L
H
H
X
Notes:
4. H = HighSignalLevel
L = LowSignalLevel
X = Don’t Care or Irrelevant
Z = HighImpedance
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07/01/03
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PI74LVTC245
3.3V,8-BitBi-DirectionalTranceiver
with3-StateOutputs
RecommendedOperatingConditions(5)
Min.
2.7
Max.
Units
VCC Supply Voltage
Operating
3.6
VIH High-level Input Voltage
VIL Low-level Input Voltage
VI Input Voltage
VCC = 2.7V to 3.6V
VCC = 2.7V to 3.6V
2.0
0.8
5.5
VCC
5.5
– 12
– 24
12
V
0
0
0
High or Low State
3-State
VO Output Voltage
VCC = 2.7V
IOH High-level output current
IOL Low-level output current
VCC = 3.0V to 3.6V
VCC = 2.7V
mA
VCC = 3.0V to 3.6V
24
∆t/∆V Input transition rise or fall rate
∆t/∆VCC Power-up ramp rate
6
ns/V
µs/V
°C
150
TA
Operating free-air temperature
– 40
85
Notes:
5. All unused inputs must be held at VCC or GND to ensure proper device operation.
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PI74LVTC245
3.3V,8-BitBi-DirectionalTranceiver
with3-StateOutputs
DCElectricalCharacteristics(Over the Operating Range, T = –40°C to +85°C)
A
Paramete-
Description
Test Conditions
Min.
Max. Units
rs
VIK
Clamp Diode Voltage
VCC = 2.7V
II = –18mA
–1.2V
VCC = 2.7V to 3.6V IOH= –100µA
VCC = 2.7V IOH= –12mA
OH= –12mA
OH= –24mA
VCC = 2.7V to 3.6V IOL= 100µA
VCC –0.2V
2.2
2.4
2.2
Output High Voltage
Output Low Voltage
VOH
I
VCC = 3V
I
V
0.2
0.4
V
CC = 2.7V
IOL= 12mA
OL= 12mA
VOL
I
0.4
VCC = 3V
IOL= 24mA
0.55
Control
Inputs
VCC = 0V to 3.6V
VI = 0V to 5.5V
±5
Input
II
Leakage
Current
VI = 5.5V
VI = VCC
VI = GND
A or B
VCC = 3.6V
VCC = 0V
±5
±5
Ports (6)
Power Off Output Leakage
Current
IOFF
IOZPU
IOZPD
VI or VO= 0V to 5.5V
µA
±5
VO = 0.5V to 5.5V,
OE = don't care
Power-Up 3-State Current VCC = 0V to 1.5V
Power-Down 3-State
VO = 0.5V to 5.5V,
OE = don't care
VCC = 1.5V to 0V
±5
Current
VI = VCCor GND
3.6V ≤ VI ≤ 5.5V(7)
One input at VCC - 0.6V(8),
Other inputs at VCC or GND
Quiescent Power Supply
Current
ICC
V
CC = 2.7V to 3.6V
IO = 0
100
500
Increase in ICC
VCC = 3.0V to 3.6V
∆ICC
Notes:
6. For I/O ports, Input Leakage Current (II) includes the 3-state Output Leakage Current. Unused pins are at VCC or GND.
7. This applies in the disabled state only.
8. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
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PI74LVTC245
3.3V,8-BitBi-DirectionalTranceiver
with3-StateOutputs
Capacitance
Parameters
(9)
Description
Control Input Capacitance
Input/Output Capacitance
Power Dissipation Capacitance
Test Conditions
= 3.3V, V = V or GND
Typ.
3.3
7.8
33
Units
C
C
V
CC
V
CC
V
CC
IN
I
CC
= 3.3V, V = V or GND
pF
IO
O
CC
(10)
C
= 3.3V, V = 0 or V
f =10 MHz
PD
I
CC,
Notes:
9. All typical values are measured at VCC = 3.3V, TA = 25°C.
10. CPD is defined as the value of the internal equivalent capacitance withic is derived from dynamic operating current consumption (ICCD) at no
output loading and operating at 50% duty cycle, CPD is related to ICCD dynamic operating current by the expression: ICCD
(CPD)(VCC)(fIN)+(ICCstatic).
=
SwitchingCharacteristicsOverOperatingRange
VCC = 3.3V ±0.3V
VCC = 2.7V
From
To
CL = 50pF, RL =
500Ohm
Parameters
Description
Units
CL = 50pF, RL = 500Ohm
(Input) (Output)
Min
1.0
Max.
5.4
Min.
1.0
Max.
5.8
tPLH
tPHL
tPZH
Propagation Delay
Output Enable Time
A or B
OE
B or A
A or B
1.0
5.4
1.0
1.0
1.0
1.0
1.0
5.8
7.9
7.9
5.8
5.8
1.0
7.0
tPZL
tPHZ
tPLZ
1.0
1.0
1.0
7.0
5.4
5.4
ns
Output Disable Time
OE
A or B
Output to Output
Skew(11)
tSK(O)
0.5
Notes:
11.Skew between any two outputs, switching in the same direction.
PS8691
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PI74LVTC245
3.3V,8-BitBi-DirectionalTranceiver
with3-StateOutputs
PARAMETERMEASUREMENTINFORMATION
VCC = 2.7V and 3.3V ±0.3V
6V
S1
Open
GND
500ohm
From Output
Under Test
Test
/t
S1
CL = 50pF
500ohm
t
Open
6V
GND
PLH PHL
(See Note A)
t
/t
PLZ PZL
t
/t
PHZ PZH
LoadCircuit
tW
2.7V
0V
1.5V
1.5V
Input
VoltageWaveforms
PulseDuration
2.7V
Output
Control
(Low Level
1.5V
1.5V
tPLZ
0V
3V
Enabling)
tPZL
2.7V
0V
Output
Waveform 1
S1 at 6V
1.5V
tPLH
1.5V
tPHL
Input
1.5V
VOL +0.3V
tPHZ
VOL
VOH
(see Note B)
tPZH
V
OH
OL
Output
Waveform 2
S1 at GND
1.5V
VOH –0.3V
1.5V
Output
1.5V
V
0V
(see Note B)
VoltageWaveforms
PropagationDelayTimes
VoltageWaveforms
Enable and Disable Times
Figure1.LoadCircuitandVoltageWaveforms
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 impulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50ohm, tR ≤ 2.5ns, tF ≤ 2.5ns.
D. The outputs are measured one at a time with one transition per measurement.
PS8691
07/01/03
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PI74LVTC245
3.3V,8-BitBi-DirectionalTranceiver
with3-StateOutputs
PackagingMechanical:20-pinSSOP(H)
20
5.00
5.60
.197
.220
1
0.09
0.25
.004
.009
.272
.295
6.90
7.50
.022
.037
0.55
0.95
.078
2.00
Max
.291
.322
7.40
8.20
SEATING
PLANE
.002
0.050
Min
.0098
Max.
0.25
.0256
BSC
0.65
DENOTES DIMENSIONS
IN MILLIMETERS
X.XX
X.XX
PackagingMechanical:20-pinTSSOP(L)
20
.169
.177
4.3
4.5
1
.252
.260
0.09
0.20
.004
.008
6.4
6.6
.047
1.20
Max
0.45 .018
0.75 .030
SEATING
PLANE
.238
.269
6.1
6.7
.002
.006
0.05
0.15
.007
.012
0.19
0.30
.0256
BSC
0.65
X.XX DENOTES CONTROLLING
X.XX DIMENSIONS IN MILLIMETERS
PS8691
07/01/03
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PI74LVTC245
3.3V,8-BitBi-DirectionalTranceiver
with3-StateOutputs
Packaging Mechanical: 20-pin SOIC (S)
20
7.40
7.60
.2914
.2992
0.254
0.737
.010
.029
x 45˚
1
.496
.511
12.60
12.99
.0091
.0125
0.23
0.32
0-8˚
0.41
1.27
.016
.050
.020 0.508
.030 0.762
REF
2.35
2.65
.0926
.1043
.394
.419
10.00
10.65
SEATING
PLANE
0.10
0.30
.0040
.0118
.050
BSC
1.27
.013
.020
X.XX
DENOTES CONTROLLING
0.33
0.51
X.XX
DIMENSIONS IN MILLIMETERS
OrderingInformation
Ordering Data
PI74LVTC245H
PI74LVTC245L
PI74LVTC245S
Description
20-pin, 209-mil wide plastic SSOP
20-pin, 173-mil wide plastic TSSOP
20-pin, 300-mil wide plastic SOIC
Notes:
1. Thermal characteristics can be found on the company web site at http://www.pericom.com/packaging/mechanicals.php
PericomSemiconductorCorporation
2380BeringDrive • SanJose,CA95131•1-800-435-2336 • Fax(408)435-1100• http://www.pericom.com
PS8691
07/01/03
8
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