Hitachi HD74LVC245AT Octal bidirectional transceivers with 3-state output Datasheet

HD74LVC245A
Octal Bidirectional Transceivers with 3-state Outputs
ADE-205-111B(Z)
3rd Edition
December 1996
Description
The HD74LVC245A has eight buffers with three state outputs in a 20 pin package. When (T / R) is high,
data flows from the A inputs to the B outputs, and when (T / R) is low, data flows from the B inputs to the
A outputs. A and B bus are separated by making enable input (OE) high level. Low voltage and high
speed operation is suitable at the battery drive product (note type personal computer) and low power
consumption extends the life of a battery for long time operation.
Features
•
•
•
•
•
•
VCC = 2.0 V to 5.5 V
All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V)
All input outputs VI/O (Max.) = 5.5 V (@VCC = 0 V or output off state)
Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)
High output current ±24 mA (@VCC = 3.0 V to 5.5 V)
Function Table
Inputs
OE
T/R
Operation
L
L
B data to A bus
L
H
A data to B bus
H
X
Z
H:
L:
X:
Z:
High level
Low level
Immaterial
High impedance
HD74LVC245A
Pin Arrangement
T/R 1
20 VCC
A0 2
19 OE
A1 3
18 B0
A2 4
17 B1
A3 5
16 B2
A4 6
15 B3
A5 7
14 B4
A6 8
13 B5
A7 9
12 B6
GND 10
11 B7
(Top view)
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
VCC
–0.5 to 6.0
V
Input diode current
I IK
–50
mA
VI = –0.5 V
Input voltage
VI
–0.5 to 6.0
V
T / R, OE
Output diode current
I OK
–50
mA
VO = –0.5 V
50
mA
VO = VCC +0.5 V
–0.5 to VCC +0.5
V
Output "H" or "L"
–0.5 to 6.0
V
Output "Z" or VCC:OFF
Input / output voltage
VI/O
Output current
IO
±50
mA
VCC, GND current / pin
I CC or IGND
100
mA
Storage temperature
Tstg
–65 to 150
°C
Conditions
Note: The absolute maximum ratings are values which must not individually be exceeded, and furthermore,
no two of which may be realized at the same time.
2
HD74LVC245A
Recommended Operating Conditions
Item
Symbol
Ratings
Unit
Conditions
Supply voltage
VCC
1.5 to 5.5
V
Data retention
2.0 to 5.5
V
At operation
VI
0 to 5.5
V
T / R, OE
VI/O
0 to V CC
V
Output "H" or "L"
0 to 5.5
V
Output "Z" or VCC:OFF
Input / output voltage
Operating temperature
Ta
–40 to 85
°C
Output current
I OH
–12
mA
VCC = 2.7 V
–24
mA
VCC = 3.0 V to 5.5 V
12
mA
VCC = 2.7 V
24
mA
VCC = 3.0 V to 5.5 V
10
ns/V
*2
I OL
*2
Input rise / fall time
*1
t r, t f
Notes: 1. This item guarantees maximum limit when one input switches.
Waveform : Refer to test circuit of switching characteristics.
2. duty cycle ≤ 50%
3
HD74LVC245A
Electrical Characteristics
Ta = –40 to 85°C
Item
Symbol VCC (V)
Input voltage
VIH
VIL
Output voltage
VOH
VOL
Min
Max
Unit
—
V
4.5 to 5.5 VCC×0.7 —
V
2.7 to 3.6 —
0.8
V
4.5 to 5.5 —
VCC×0.3 V
2.7 to 3.6 2.0
Test Conditions
2.7 to 5.5 VCC –0.2 —
V
I OH = –100 µA
2.7
2.2
—
V
I OH = –12 mA
3.0
2.4
—
V
3.0
2.2
—
V
4.5
3.8
—
V
2.7 to 5.5 —
0.2
V
I OL = 100 µA
2.7
—
0.4
V
I OL = 12 mA
3.0
—
0.55
V
I OL = 24 mA
4.5
—
0.55
V
I OH = –24 mA
Input current
I IN
0 to 5.5
—
±5.0
µA
VIN = 5.5 V or GND
Off state output current
I OZ
2.7 to 5.5 —
±5.0
µA
VIN = VCC, GND
VOUT = 5.5 V or GND
Output leak current
I OFF
Quiescent supply current I CC
∆I CC
4
20
µA
VIN / V OUT = 5.5 V
2.7 to 3.6 —
±10
µA
VIN / V OUT = 3.6 to 5.5 V
2.7 to 5.5 —
10
µA
VIN = VOUT or GND
3.0 to 3.6 —
500
µA
VIN = one input at (VCC –0.6)V,
other inputs at V CC or GND
0
—
HD74LVC245A
Switching Characteristics
Ta = –40 to 85°C
Item
Symbol VCC (V)
Min
Typ
Max
Unit
From (Input) To (Output)
Propagation delay time
t PLH
2.7
—
—
8.0
ns
A or B
B or A
t PHL
3.3±0.3
1.5
—
7.0
ns
5.0±0.5
—
—
5.5
ns
t ZH
2.7
—
—
9.5
ns
OE
A or B
t ZL
3.3±0.3
1.5
—
8.5
ns
5.0±0.5
—
—
7.0
ns
t ZH
2.7
—
—
8.5
ns
OE
A or B
t LZ
3.3±0.3
1.5
—
7.5
ns
5.0±0.5
—
—
6.5
ns
t OSLH
2.7
—
—
—
ns
t OSHL
3.3±0.3
—
—
1.0
ns
5.0±0.5
—
—
1.0
ns
Output enable time
Output disable time
Between outut pins skew
*1
Input capacitance
CIN
2.7
—
3.0
—
pF
Output capacitance
CO
2.7
—
15.0
—
pF
Note:
1. This parameter is characterized but not tested.
tosLH = | tPLHm - tPLHn |, tosHL = | tPHLm - tPHLn|
5
HD74LVC245A
Test Circuit
VCC
VCC
Input
Pulse
Generator
Zout = 50 Ω
See Function Table
OE
Output
A0
S1
500 Ω
S2
OPEN
See
under table
GND
*1
B0
CL =
50 pF
450 Ω
50 Ω Scope
T/R
Symbol
t PLH / t PHL
t ZH/ t HZ
t ZL / t LZ
Note:
1.
S2
Vcc=2.7V,
3.3±0.3V
Vcc=5.0±0.5V
OPEN
GND
OPEN
GND
6V
2×Vcc
CL includes probe and jig capacitance.
Waveforms – 1
tr
tf
90 %
Input
VIH
90 %
Vref
Vref
10 %
10 %
GND
t PHL
t PLH
VOH
In phase output
Vref
Vref
VOL
6
HD74LVC245A
Waveforms – 2
tf
tr
90 %
Vref
10 %
OE
VIH
90 %
Vref
10 %
t LZ
t ZL
GND
≈V OH1
Vref
Waveform - A
t ZH
Waveform - B
VOL + 0.3 V
t HZ
VOH – 0.3 V
Vref
VOL
VOH
≈V OL1
TEST
VIH
Vref
VOH1
VOL1
Notes:
1.
2.
3.
4.
Vcc=2.7V,
3.3±0.3V
Vcc=5.0±0.5V
2.7 V
Vcc
1.5 V
3V
50%Vcc
GND
GND
Vcc
tr = 2.5 ns, tf = 2.5 ns
Input waveform : PRR = 10 MHz, duty cycle 50%
Waveform – A shows input conditions such that the output is "L" level when enable by the
output control.
Waveform – B shows input conditions such that the output is "H" level when enable by the
output control.
7
Unit: mm
6.50
6.80 Max
11
1
10
4.40
20
0.65
*0.22+0.08
–0.07
0.20 ± 0.06
1.0
0.13 M
6.40 ± 0.20
*Dimension including the plating thickness
Base material dimension
0.07 +0.03
–0.04
0.10
*0.17 ± 0.05
0.15 ± 0.04
1.10 Max
0.65 Max
0° – 8°
0.50 ± 0.10
Hitachi Code
JEDEC
EIAJ
Weight (reference value)
TTP-20DA
—
—
0.07 g
Cautions
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received the latest product standards or specifications before final design, purchase or use.
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contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
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