Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74HC640
CMOS IC
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
„
DESCRIPTION
The U74AHC640 is a octal bus transceivers with 3-state
outputs. It is designed for asynchronous two-way communication
between data buses. Depending on the direction-control (DIR) input,
data are transmitted from the A bus to the B bus or from the B bus to
the A bus.
When OE is high, the buses are effectively isolated. When
OE is low, the buses are enable.
„
FEATURES
* Wide Supply Voltage Range from 2V to 6V
* Typical tPD of 8ns at 6V, CL=50pF
* Low Power Consumption, ICC = 8μA (Max) at 5.5V
* ±7.8mA Output Driver at 6V
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AHC640L-R20-R
U74AHC640G-R20-R
U74AHC640L-R20-T
U74AHC640G-R20-T
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Copyright © 2011 Unisonic Technologies Co., Ltd
Package
Packing
SSOP-20
SSOP-20
Tape Reel
Tube
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U74HC640
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„
CMOS IC
PIN CONFIGURATION
DIR
1
20 VCC
A1
2
19
OE
A2
3
18
B1
A3
4
17
B2
A4
5
16
B3
A5
6
15
B4
A6
7
14
B5
A7
8
13
B6
A8
9
12
B7
GND
10
11
B8
FUNCTION TABLE
INPUTS
„
OE
DIR
L
L
H
L
H
X
OPERATION
B data to A bus
A data to B bus
Isolation
LOGIC DIAGRAM
OE
DIR
A1
B1
To seven other transceivers
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CMOS IC
ABSOLUTE MAXIMUM RATING (unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5~7
V
Input Voltage
VIN
-0.5~7
V
Output Voltage
VOUT
-0.5~VCC +0.5
V
Input Clamp Current (VIN<0)
IIK
±20
mA
Output Clamp Current (VOUT<0, or VOUT>VCC)
IOK
±20
mA
Output Current
IOUT
±35
mA
VCC or GND Current
ICC
±70
mA
Storage Temperature
TSTG
-65 ~ +150
°C
Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
„
RECOMMENDED OPERATING COMDITIONS
PARAMETER
Supply Voltage
SYMBOL
VCC
High-Level Input Voltage
VIH
Low-Level Input Voltage
VIL
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
Operating Temperature
„
CONDITIONS
VCC = 2V
VCC = 4.5V
VCC = 6V
VCC = 2V
VCC = 4.5V
VCC = 6V
VIN
VOUT
Δt/Δv
MIN
2
1.5
3.15
4.2
TYP
5
UNIT
V
V
0.5
1.35
1.8
VCC
VCC
1000
500
400
85
0
0
VCC = 2V
VCC = 4.5V
VCC = 6V
TA
MAX
6
-40
V
V
V
ns/V
°C
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
High-Level Output Voltage
Low-Level Output Voltage
Input Leakage Current(DIR or OE )
High-Impedance State Current (A or B)
Quiescent Supply Current
Input Capacitance (DIR or OE )
SYMBOL
VOH
VOL
II(LEAK)
IOZ
ICC
CIN
TEST CONDITIONS
IOH = -20μA, VCC = 2V
IOH = -20μA, VCC = 4.5V
IOH = -20μA, VCC = 6V
IOH = -6mA, VCC = 4.5V
IOH = -7.8mA, VCC = 6V
IOL = 20μA, VCC = 2V
IOL = 20μA, VCC = 4.5V
IOL = 20μA, VCC = 6V
IOL = 6mA, VCC = 4.5V
IOL = 7.8mA, VCC = 6V
VIN = VCC or 0, VCC = 6V
VOUT = VCC or 0, VCC = 6V
VIN=VCC or 0,IOUT=0,VCC=6V
VIN=VCC or 0,VCC=2V to 6V
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MIN
1.9
4.4
5.9
3.98
5.48
TYP
1.998
4.499
5.999
4.3
5.8
0.002
0.001
0.001
0.17
0.15
MAX
0.1
0.1
0.1
0.26
0.26
V
±0.1
±0.01
±100
±0.5
8
10
μA
μA
μA
pF
3
UNIT
V
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CMOS IC
SWITCHING CHARACTERISTICS (TA =25°C)
CL=50pF, RL=1kΩ
PARAMETER
SYMBOL
Propagation Delay from A to B or B to A
tPD
Enable Times from OE to A or B
tEN
Disable Times from OE to A or B
tDIS
Output Rise or fall Time
CL=150pF, RL=1kΩ
PARAMETER
tT
SYMBOL
Propagation Delay from A to B or B to A
tPD
Enable Times from OE to A or B
tEN
OUTPUT rise or fall Time
tT
„
TEST CONDITIONS
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
MIN TYP
29
10
8
109
27
20
40
18
16
20
8
6
MAX UNIT
105
ns
21
18
230
ns
46
39
150
ns
30
26
60
ns
12
10
TEST CONDITIONS
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
VCC=2V
VCC=4.5V
VCC=6V
MIN TYP
44
14
11
124
31
23
45
17
13
MAX UNIT
190
ns
38
33
315
ns
63
54
210
ns
42
36
OPERATING CHARACTERISTICS (TA =25°C)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
CPD
No load
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TYP
40
UNIT
pF
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
VCC
Input
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
GND
VM
VLOAD
VIN
tR, tF
3.3V±0.3V
VCC
≤3ns
VCC/2
VCC
5V±0.5V
VCC
≤3ns
VCC/2
VCC
90%
CL
50pF
150pF
50pF
150pF
RL
VΔ
1kΩ
0.3V
1kΩ
0.5V
VCC
90%
Input
10%
10%
tR
tF
0V
Voltage Waveforms Input Rise and Fall Times
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CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
0V
tPHL
tPLH
90%
Output
VOH
90%
VM
VM
10%
10%
tR
tPHL
tPLH
tF
90%
90%
Output
VM
VOL
VOH
VM
10%
10%
VOL
tR
tF
Voltage Waveforms Propagation Delay and Output Transition Times
VIN
Input
VM
VM
0V
tPZL
tPLZ
VLOAD
Output
VM
S1 at VLOAD
VOL+VΔ
tPHZ
tPZH
VOH-VΔ
Output
VOL
VOH
VM
S1 at GND
0V
VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω,
tR=6ns, tF=6ns.
3. tPLH and tPHL are the same as tPD .
4. tPLZ and tPHZ are the same as tDIS .
5. tPZH and tPZL are the same as tEN .
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CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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