TECHNICAL DATA
Octal 3-State Inverting
Bus Transceiver
High-Speed Silicon-Gate CMOS
The KK74AC640 is identical in pinout to the LS/ALS640,
HC/HCT640. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS outputs.
The KK74AC640 is a 3-state transceiver that is used for 2-way
asynchronous communication between data buses. The device has an
active-low Output Enable pin, which is used to place the I/O ports into
high-impedance states. The Direction control determines whether data
flows from A to B or from B to A.
•
Outputs Directly Interface to CMOS, NMOS, and TTL
•
Operating Voltage Range: 2.0 to 6.0 V
•
Low Input Current: 1.0
µA;
o.1
µA
@ 25°C
•
High Noise Immunity Characteristic of CMOS Devices
•
Outputs Source/Sink 24 mA
KK74AC640
ORDERING INFORMATION
KK74AC640N Plastic
KK74AC640DW SOIC
T
A
= -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Control Inputs
Output
Enable
L
Direction
L
Operation
Data Transmitted
from Bus B to
Bus A (inverted)
Data Transmitted
from Bus A to
Bus B (inverted)
Buses Isolated
(High Impedance
State)
L
PIN 20=V
CC
PIN 10 = GND
H
H
X
X = don’t care
1
KK74AC640
MAXIMUM RATINGS
*
Symbol
V
CC
V
IN
V
OUT
I
IN
I
OUT
I
CC
P
D
Tstg
T
L
*
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC Supply Current, V
CC
and GND Pins
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
Value
-0.5 to +7.0
-0.5 to V
CC
+0.5
-0.5 to V
CC
+0.5
±20
±50
±50
750
500
-65 to +150
260
Unit
V
V
V
mA
mA
mA
mW
°C
°C
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN
, V
OUT
T
J
T
A
I
OH
I
OL
t
r
, t
f
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Junction Temperature (PDIP)
Operating Temperature, All Package Types
Output Current - High
Output Current - Low
Input Rise and Fall Time
*
(except Schmitt Inputs)
V
CC
=3.0 V
V
CC
=4.5 V
V
CC
=5.5 V
0
0
0
-40
Min
2.0
0
Max
6.0
V
CC
140
+85
-24
24
150
40
25
Unit
V
V
°C
°C
mA
mA
ns/V
*
V
IN
from 30% to 70% V
CC
This device contains protection circuitry to guard against damage due to high static voltages or electric fields.
However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this
high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range GND≤(V
IN
or
V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
). Unused
outputs must be left open.
2
KK74AC640
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
V
CC
Symbol
V
IH
Parameter
Minimum High-
Level Input Voltage
Maximum Low -
Level Input Voltage
Minimum High-
Level Output Voltage
Test Conditions
V
OUT
=0.1 V or V
CC
-0.1 V
V
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
5.5
5.5
Guaranteed Limits
25
°C
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±0.1
±0.6
-40°C to
85°C
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
±1.0
±6.0
µA
µA
V
Unit
V
V
IL
V
OUT
=0.1 V or V
CC
-0.1 V
V
V
OH
I
OUT
≤
-50
µA
V
V
IN
=V
IH
or V
IL
I
OH
=-12 mA
I
OH
=-24 mA
I
OH
=-24 mA
V
OL
Maximum Low-
Level Output Voltage
I
OUT
≤
50
µA
*
*
V
IN
=V
IH
or V
IL
I
OL
=12 mA
I
OL
=24 mA
I
OL
=24 mA
V
IN
=V
CC
or GND
I
IN
I
OZ
Maximum Input
Leakage Current
Maximum Three-
State Leakage
Current
+Minimum Dynamic
Output Current
+Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
(per Package)
V
IN
(OE)= V
IH
or V
IL
V
IN
=V
CC
or GND
V
OUT
=V
CC
or GND
V
OLD
=1.65 V Max
V
OHD
=3.85 V Min
V
IN
=V
CC
or GND
I
OLD
I
OHD
I
CC
5.5
5.5
5.5
8.0
75
-75
80
mA
mA
µA
*
All outputs loaded; thresholds on input associated with output under test.
+Maximum test duration 2.0 ms, one output loaded at a time.
Note: I
IN
and I
CC
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
CC
3
KK74AC640
AC ELECTRICAL CHARACTERISTICS
(C
L
=50pF,Input t
r
=t
f
=3.0 ns)
V
CC*
Symbol
Parameter
V
Guaranteed Limits
25
°C
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
C
IN
C
OUT
Propagation Delay, A to B or B to A
(Figure 1)
Propagation Delay, A to B or B to A
(Figure 1)
Propagation Delay, Direction or Output
Enable to A or B (Figure 2)
Propagation Delay, Directionor Output Enable
to A or B (Figure 2)
Propagation Delay, Directionor Output Enable
to A or B (Figure 2)
Propagation Delay, Direction or Output
Enable to A or B (Figure 2)
Maximum Input Capacitance
Maximum Tree-State I/O Capacitance
(Output in High-Impedance State0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
5.0
5.0
1.5
1.5
1.5
1.5
2.5
1.5
2.5
1.5
2.0
1.5
2.0
1.5
4.5
15
Max
8.5
6.5
8.5
6.5
11.5
8.0
12.5
9.5
12.0
9.0
12.0
9.5
-40°C to
85°C
Min
1.0
1.0
1.0
1.0
2.0
1.0
2.0
1.0
1.0
1.0
1.5
1.0
4.5
15
Max
9.5
7.5
9.5
7.5
12.5
9.0
13.5
10.0
12.5
10.0
13.5
10.5
ns
ns
ns
ns
ns
ns
pF
pF
Unit
Typical @25°C,V
CC
=5.0 V
C
PD
*
Power Dissipation Capacitance
45
pF
Voltage Range 3.3 V is 3.3 V
±0.3
V
Voltage Range 5.0 V is 5.0 V
±0.5
V
Figure 1. Switching Waveforms
Figure 2. Switching Waveforms
4
KK74AC640
EXPANDED LOGIC DIAGRAM
5
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