Lite Drive is a trademark of Cypress Semiconductor Corporation.
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
• CA 95134 •
408-943-2600
February 26, 1997 - Revised April 20, 1998
CY74FCT163245
CY74FCT163H245
CY74FCT163LD245
CY74FCT163LDH245
Pin Description
Name
OE
DIR
A
B
Direction Control
Inputs or Three-State Outputs
[1]
Inputs or Three-State Outputs
[1]
Description
Three-State Output Enable Inputs (Active LOW)
Maximum Ratings
[3, 4]
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature ................................. –55°C to +125°C
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
Supply Voltage Range ........................................0.5V to 4.6V
DC Input Voltage ............................................–0.5V to +7.0V
DC Output Voltage..........................................–0.5V to +7.0V
DC Output Current
(Maximum Sink Current/Pin) ........................ –60 to +120 mA
DIR
L
H
X
Outputs
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
Power Dissipation .......................................................... 1.0W
Function Table
[2]
Inputs
OE
L
L
H
Operating Range
Range
Industrial
Ambient
Temperature
–40°C to +85°C
V
CC
2.7V to3.6V
Electrical Characteristics for Non Bus Hold Devices
Over the Operating Range V
CC
=2.7V to 3.6V
Parameter
V
IH
V
IL
V
H
V
IK
I
IH
I
IL
I
OZH
I
OZL
I
OS
I
OFF
I
CC
∆I
CC
Description
Input HIGH Voltage
Input LOW Voltage
Input Hysteresis
[6]
Input Clamp Diode Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
(Three-State Output pins)
High Impedance Output Current
(Three-State Output pins)
Short Circuit Current
[7]
Power-Off Disable
Quiescent Power Supply Current
Quiescent Power Supply Current
(TTL inputs HIGH)
V
CC
=Min., I
IN
=–18 mA
V
CC
=Max., V
I
=5.5
V
CC
=Max., V
I
=GND
V
CC
=Max., V
OUT
=5.5V
V
CC
=Max., V
OUT
=GND
V
CC
=Max., V
OUT
=GND
V
CC
=0V, V
OUT
≤4.5V
V
IN
≤0.2V,
V
IN
>V
CC
–0.2V
V
IN
=V
CC
–0.6V
[8]
V
CC
=Max.
V
CC
=Max.
0.1
2.0
–60
–135
100
–0.7
–1.2
±1
±1
±1
±1
–240
±100
10
30
Test Conditions
All Inputs
Min.
2.0
Typ.
[5]
Max.
5.5
0.8
Unit
V
V
mV
V
µA
µA
µA
µA
mA
µA
µA
µA
Note:
1. On CY74FCT163H245 and CY74FCT163LDH245 these pins have bus hold.
2. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Impedance.
3. Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature
range.
4. Unused inputs must always be connected to an appropriate logic voltage level, preferably either V
CC
or ground.
5. Typical values are at V
CC
=3.3V, T
A
= +25°C ambient.
6. This parameter is guaranteed but not tested.
7. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of
a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter
tests, I
OS
tests should be performed last.
8. Per TTL driven input; all other inputs at V
CC
or GND.
2
CY74FCT163245
CY74FCT163H245
CY74FCT163LD245
CY74FCT163LDH245
Electrical Characteristics For Bus Hold Devices
Over the Operating Range V
CC
=2.7V to 3.6V
Parameter
V
IH
V
IL
V
H
V
IK
I
IH
I
IL
I
BBH
I
BBL
I
BHHO
I
BHLO
I
OZH
I
OZL
I
OS
I
OFF
I
CC
∆
ICC
Description
Input HIGH Voltage
Input LOW Voltage
Input Hysteresis
[6]
Input Clamp Diode Voltage
Input HIGH Current
Input LOW Current
Bus Hold Sustain Current on Bus Hold Input
[9]
V
CC
=Min.
V
I
=2.0V
V
I
=0.8V
Bus Hold Overdrive Current on Bus Hold Input
[9]
V
CC
=Max., V
I
=1.5V
High Impedance Output Current
(Three-State Output pins)
High Impedance Output Current
(Three-State Output pins)
Short Circuit Current
[7]
Power-Off Disable
Quiescent Power Supply Current
Quiescent Power supply Current
(TTL inputs HIGH)
V
CC
=Max., V
OUT
=V
CC
V
CC
=Max., V
OUT
=GND
V
CC
=Max., V
OUT
=GND
V
CC
=0V, V
OUT
≤4.5V
V
IN
≤0.2V,
V
IN
>V
CC
–0.2V
V
CC
=Max.
–60
–135
–50
+50
±500
±1
±1
–240
±100
+40
+350
V
CC
=Min., I
IN
=–18 mA
V
CC
=Max., V
I
=V
CC
100
–0.7
–1.2
±100
±100
Test Conditions
All Inputs
Min.
2.0
Typ.
[5]
Max.
V
CC
0.8
Unit
V
V
mV
V
µA
µA
µA
µA
µA
µA
µA
mA
µA
µA
µA
V
IN
=V
CC
–0.6V
[8]
V
CC
=Max.
Electrical Characteristics For Balanced Drive Devices
Over the Operating Range V
CC
=2.7V to 3.6V
Parameter
I
ODL
I
ODH
V
OH
Description
Output LOW Dynamic Current
[7]
Output HIGH Dynamic Current
[7]
Output HIGH Voltage
Test Conditions
V
CC
=3.3V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
V
CC
=3.3V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
V
CC
=Min., I
OH
= –0.1 mA
V
CC
=Min., I
OH
= –8 mA
V
CC
=3.0V, I
OH
= –24 mA
V
OL
Output LOW Voltage
V
CC
=Min., I
OL
= 0.1mA
V
CC
=Min., I
OL
= 24 mA
0.3
Min.
45
–45
V
CC
–0.2
2.4
[10]
2.0
3.0
3.0
0.2
0.55
Typ.
[5]
Max.
180
–180
Unit
mA
mA
V
V
V
V
Electrical Characteristics For Lite Drive Devices
Over the Operating Range V
CC
=3.0V to 3.6V
Parameter
I
ODL
I
ODH
V
OH
V
OL
Description
Output LOW Dynamic Current
[7]
Test Conditions
V
CC
=3.3V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
V
CC
=3.3V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
V
CC
=3.0 V, I
OH
= –6 mA
V
CC
=3.0 V, I
OL
= 6 mA
Min.
15.0
–15.0
2.4
Typ.
[5]
Max.
45
–45
Unit
mA
mA
V
Output HIGH Dynamic Current
[7]
Output HIGH Voltage
Output LOW Voltage
3.0
0.55
V
Notes:
9. Pins with bus hold are described in Pin Description.
10. V
OH
=V
CC
–0.6V at rated current.
3
CY74FCT163245
CY74FCT163H245
CY74FCT163LD245
CY74FCT163LDH245
Capacitance
[6]
(T
A
= +25°C, f = 1.0 MHz)
Parameter
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
V
IN
= 0V
V
OUT
= 0V
Test Conditions
Typ.
[5]
4.5
5.5
Max.
6.0
8.0
Unit
pF
pF
Power Supply Characteristics
Parameter
I
CCD
Description
Dynamic Power Supply
Current
[11]
Total Power Supply
Current
[12]
Test Conditions
V
CC
=Max., One Input Toggling, V
IN
=V
CC
or
50% Duty Cycle,
V
IN
=GND
Outputs Open, OE=GND
V
CC
=Max., f
1
=10 MHz, 50%
V
IN
=V
CC
or
Duty Cycle, Outputs Open, One V
IN
=GND
Bit Toggling, OE=GND
V
IN
=V
CC
–0.6V or
V
IN
=GND
V
CC
=Max., f
1
=2.5 MHz, 50%
V
IN
=V
CC
or
Duty Cycle, Outputs Open, Six- V
IN
=GND
teen Bits Toggling, OE=GND
V
IN
=V
CC
–0.6V or
V
IN
=GND
Typ.
[5]
50
Max.
75
Unit
µA/MHz
I
C
0.5
0.5
2.0
2.0
0.8
0.8
3.0
[13]
3.3
[13]
mA
mA
mA
mA
Switching Characteristics
Over the Operating Range
V
CC
=3.0V to 3.6V
[14,15]
CY74FCT163245A
CY74FCT163H245A
Parameter
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK(O)
Description
Propagation Delay Data to
Output
Output Enable Time
Output Disable Time
Output Skew
[17]
Min.
1.5
1.5
1.5
Max.
4.8
6.2
5.6
0.5
CY74FCT163245C
CY74FCT163H245C
Min.
1.5
1.5
1.5
Max.
4.1
5.8
5.2
0.5
Unit
ns
ns
ns
ns
Fig. No.
[16]
1, 3
1, 7, 8
1, 7, 8
—
Notes:
11. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
12. I
C
I
C
= I
CC
+∆I
CC
D
H
N
T
+I
CCD
(f
0
/2 + f
1
N
1
)
I
CC
= Quiescent Current with CMOS input levels
∆I
CC
= Power Supply Current for a TTL HIGH input (V
IN
=3.4V)
D
H
= Duty Cycle for TTL inputs HIGH
N
T
= Number of TTL inputs at D
H
I
CCD
= Dynamic Current caused by an input transition pair (HLH or LHL)
f
0
= Clock frequency for registered devices, otherwise zero
= Input signal frequency
f
1
N
1
= Number of inputs changing at f
1
All currents are in milliamps and all frequencies are in megahertz.
13. Values for these conditions are examples of the I
CC
formula. These limits are guaranteed but not tested.
14. Minimum limits are guaranteed but not tested on Propagation Delays.
15. For V
CC
=2.7, propagation delay, output enable and output disable times should be degraded by 20%.
16. See “Parameter Measurement Information” in the General Information section.
17. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
4
CY74FCT163245
CY74FCT163H245
CY74FCT163LD245
CY74FCT163LDH245
Switching Characteristics
Over the Operating Range
V
CC
=3.0V to 3.6V
[14,15]
CY74FCT163LD245
CY74FCT163LDH245
[18]
Parameter
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK(O)
Description
Propagation Delay Data to
Output
Output Enable Time
Output Disable Time
Output Skew
[17]
Min.
1.5
1.5
1.5
Max.
7.0
9.5
7.5
0.5
CY74FCT163LD245A
CY74FCT163LDH245A
[18]
Min.
1.5
1.5
1.5
Max.
4.8
6.2
5.6
0.5
Unit
ns
ns
ns
ns
Fig. No.
[16]
1, 3
1, 7, 8
1, 7, 8
—
Note:
18. For Lite Drive devices the load capacitance is 30 pF. For other devices the load capacitance is 50 pF.
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