PI74FCT16540/162540/162H540T
16-BIT BUFFER/LINE DRIVERS
1
PS2036A 03/11/96
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Logic Block Diagram
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Product Description
Pericom Semiconductor's PI74FCT series of logic circuits are pro-
duced in the Company's advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT16540T, PI74FCT162540T, and PI74FCT162H540T
are inverting 16-bit buffer/line drivers designed for applications
driving high capacitance loads and low impedance backplanes.
These high-speed, low power devices offer bus/backplane interface
capability and a flow-through organization for ease of board layout.
These devices are designed with three-state controls to operate in a
Quad-Nibble, Dual-Byte, or a single 16-bit word mode.
The PI74FCT16540T output buffers are designed with a Power-Off
disable allowing "live insertion" of boards when used as backplane
drivers.
The PI74FCT162540T has 24 mA balanced output drivers. It is
designed with current limiting resistors at its outputs to control the
output edge rate resulting in lower ground bounce and undershoot.
This eliminates the need for external terminating resistors for most
interface applications.
The PI74FCT162H540T has "Bus Hold" which retains the input's
last state whenever the input goes to high-impedance preventing
"floating" inputs and eliminating the need for pull-up/down resistors.
PI74FCT16540T
PI74FCT162540T
PI74FCT162H540T
Fast CMOS 16-Bit
Buffer/Line Drivers
Product Features
Common Features
PI74FCT16500T, PI74FCT162500T, and PI74FCT162H540T
are high-speed,
low power devices with high current drive
V
CC
= 5V 10%
Hysteresis on all inputs
Packages available
48-pin 240 mil wide plastic TSSOP (A)
48-pin 300 mil wide plastic SSOP (V)
PI74FCT16540T Features
High output drive: I
OH
= 32 mA; I
OL
= 64 mA
Power off disable outputs permit "live insertion"
Typical V
OLP
(Output Ground Bounce) < 1.0V
at V
CC
= 5V, T
A
= 25C
PI74FCT162540T Features
Balanced output drivers: 24 mA
Reduced system switching noise
Typical V
OLP
(Output Ground Bounce) < 0.6V
at V
CC
= 5V, T
A
= 25C
PI74FCT162H540T Features (Advance Information)
Bus Hold retains last active bus state during 3-state
Eliminates the need for external pull-up resistors
1
OE
A
1
A
0
1
Y
0
1
OE
B
1
A
1
1
Y
1
1
A
2
1
Y
2
1
A
3
1
Y
3
1
A
4
1
Y
4
1
A
5
1
Y
5
1
A
6
1
Y
6
1
A
7
1
Y
7
2
OE
A
2
A
0
2
Y
0
2
OE
B
2
A
1
2
Y
1
2
A
2
2
Y
2
2
A
3
2
Y
3
2
A
4
2
Y
4
2
A
5
2
Y
5
2
A
6
2
Y
6
2
A
7
2
Y
7
PI74FCT16540/162540/162H540T
16-BIT BUFFER/LINE DRIVERS
2
PS2036A 03/11/96
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Product Pin Description
Pin Name
Description
X
OE
3-State Output Enable Inputs (Active LOW)
xAx
Inputs
(1)
xYx
3-State Outputs (Active LOW)
GND
Ground
V
CC
Power
Note:
1. For the PI74FCT162H540T, these pins have "Bus
Hold." All other pins are standard, outputs, or I/Os.
Inputs
(1)
Outputs
(1)
X
OE
xAx
xYx
L
L
H
L
H
L
H
X
Z
Truth Table
Note:
1. H = High Voltage Level
X = Don't Care,
L = Low Voltage Level
Z = High Impedance
Product Pin Configuration
1
2
3
4
5
6
7
8
9
48
10
47
11
46
12
45
13
44
14
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
32
31
30
29
28
27
26
25
1
OE
A
1
Y
0
1
Y
1
GND
1
Y
2
1
Y
3
V
CC
1
Y
4
1
Y
5
GND
1
Y
6
1
Y
7
2
Y
0
2
Y
1
GND
2
Y
2
2
Y
3
V
CC
2
Y
4
2
Y
5
GND
2
Y
6
2
Y
7
2
OE
A
1
OE
B
1
A
0
1
A
1
GND
1
A
2
1
A
3
V
CC
1
A
4
1
A
5
GND
1
A
6
1
A
7
2
A
0
2
A
1
GND
2
A
2
2
A
3
V
CC
2
A
4
2
A
5
GND
2
A
6
2
A
7
2
OE
B
48-PIN
V48
A48
PI74FCT16540/162540/162H540T
16-BIT BUFFER/LINE DRIVERS
3
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DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 5.0V 10%)
Parameters
Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.8
V
I
IH
Input HIGH Current
Standard Input, V
CC
= Max.
V
IN
= V
CC
1
A
I
IH
Input HIGH Current
Standard I/O, V
CC
= Max.
V
IN
= V
CC
1
A
I
IH
Input HIGH Current
Bus Hold Input
(4)
, V
CC
= Max.
V
IN
= V
CC
100
A
I
IH
Input HIGH Current
Bus Hold I/O
(4)
, V
CC
= Max.
V
IN
= V
CC
100
A
I
IL
Input LOW Current
Standard Input, V
CC
= Min.
V
IN
= GND
1
A
I
IL
Input LOW Current
Standard I/O, V
CC
= Min.
V
IN
= GND
1
A
I
IL
Input LOW Current
Bus Hold Input
(4)
, V
CC
= Min.
V
IN
= GND
100
A
I
IL
Input LOW Current
Bus Hold I/O
(4)
, V
CC
= Min.
V
IN
= GND
100
A
I
BHH
Bus Hold
Bus Hold Input
(4)
, V
CC
= Min.
V
IN
= 2.0V
50
A
I
BHL
Sustain Current
V
IN
= 0.8V
+50
I
OZH
(5)
High-Impedance
V
CC
= Max.
V
OUT
= 2.7V
1
A
I
OZL
(5)
Output Current
V
CC
= Max.
V
OUT
= 0.5V
1
A
(3-S
TATE
O
UTPUTS
)
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18 mA
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max.
(3)
, V
OUT
= GND
80
140
200
mA
I
O
Output Drive Current
V
CC
= Max.
(3)
, V
OUT
= 2.5V
50
180
mA
V
H
Input Hysteresis
100
mV
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature .................................................................... 65C to +150C
Ambient Temperature with Power Applied .................................... 40C to +85C
Supply Voltage to Ground Potential (Inputs & Vcc Only) .............. 0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ........... 0.5V to +7.0V
DC Input Voltage ............................................................................ 0.5V to +7.0V
DC Output Current ..................................................................................... 120 mA
Power Dissipation .......................................................................................... 1.0W
Note:
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.
Notes:
1. For Max. or Min. conditions , use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, +25C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. Pins with Bus Hold are identified in the pin description.
5. This specification does not apply to bi-directional functionalities with Bus Hold.
PI74FCT16540/162540/162H540T
16-BIT BUFFER/LINE DRIVERS
4
PS2036A 03/11/96
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PI74FCT16540T Output Drive Characteristics
(Over the Operating Range)
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
OH
Output HIGH Voltage
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OH
= 3.0 mA
2.5
3.5
V
I
OH
= 15.0 mA
2.4
3.5
I
OH
= 32.0 mA
2.0
3.0
V
OL
Output LOW Voltage
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OL
= 64 mA
0.2
0.55
V
I
OFF
Power Down Disable
V
CC
= 0V, V
IN
or V
OUT
4.5V
--
--
100
A
PI74FCT162540T/162H540T Output Drive Characteristics
(Over the Operating Range)
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
V
OH
Output HIGH Voltage
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OH
= 24.0 mA
2.4
3.3
V
V
OL
Output LOW Voltage
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OL
= 24 mA
0.3
0.55
V
I
ODL
Output LOW Current
V
CC
= 5V, V
IN
= V
IH
OR
V
IL
, V
OUT
= 1.5V
(3)
60
115
150
mA
I
ODH
Output HIGH Current
V
CC
= 5V, V
IN
= V
IH
OR
V
IL
, V
OUT
= 1.5V
(3)
60
115
150
mA
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, +25C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is determined by device characterization but is not production tested.
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(4)
Description
Test Conditions
Typ
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
4.5
6
pF
C
OUT
Output Capacitance
V
OUT
= 0V
5.5
8
pF
PI74FCT16540/162540/162H540T
16-BIT BUFFER/LINE DRIVERS
5
PS2036A 03/11/96
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Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power
V
CC
= Max.
V
IN
= GND or V
CC
0.1
500
A
Supply Current
I
CC
Supply Current per
V
CC
= Max.
V
IN
= 3.4V
(3)
0.5
1.5
mA
Input @ TTL HIGH
I
CCD
Supply Current per
V
CC
= Max.,
V
IN
= V
CC
60
100
A/
Input per MHz
(4)
Outputs Open
V
IN
= GND
MHz
X
OE = GND
One Bit Toggling
50% Duty Cycle
I
C
Total Power Supply
V
CC
= Max.,
V
IN
= V
CC
0.6
1.5
(5)
mA
Current
(6)
Outputs Open
V
IN
= GND
f
I
= 10 MH
Z
50% Duty Cycle
X
OE = GND
One Bit Toggling
V
IN
= 3.4V
0.9
2.3
(5)
V
IN
= GND
V
CC
= Max.,
V
IN
= V
CC
2.4
4.5
(5)
Outputs Open
V
IN
= GND
f
I
= 2.5 MH
Z
50% Duty Cycle
X
OE = GND
16 Bits Toggling
V
IN
= 3.4V
6.4
16.5
(5)
V
IN
= GND
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25C ambient.
3. Per TTL driven input (V
IN
= 3.4V); all other inputs at Vcc or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6. I
C
=I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
I
N
I
)
I
CC
= Quiescent Current
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
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
PI74FCT16540/162540/162H540T
16-BIT BUFFER/LINE DRIVERS
6
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PI74FCT16540T Switching Characteristics over Operating Range
16540T
16540AT
16540CT
16540DT
16540ET
Com.
Com.
Com.
Com.
Com.
Parameters
Description
Conditions
(1)
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Unit
t
PLH
Propagation Delay
C
L
= 50 pF
1.5
8.0
1.5
4.8
1.5
4.3
1.5
3.6
1.5
3.2
ns
t
PHL
X
A
X
to
X
Y
X
R
L
= 500
t
PZH
Output Enable Time
1.5
10.0
1.5
6.2
1.5
5.8
1.5
4.8
1.5
4.4
ns
t
PZL
xOE to xAx or xYx
t
PHZ
Output Disable Time
(3)
1.5
9.5
1.5
5.6
1.5
5.2
1.5
4.3
1.5
4.3
ns
t
PLZ
xOE to xAx or xYx
t
SK
(o)
Output Skew
(4)
--
0.5
--
0.5
--
0.5
--
0.5
--
0.5
ns
PI74FCT162540T Switching Characteristics over Operating Range
162540T
162540AT
162540CT
162540DT
162540ET
Com.
Com.
Com.
Com.
Com.
Parameters
Description
Conditions
(1)
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Unit
t
PLH
Propagation Delay
C
L
= 50 pF
1.5
8.0
1.5
4.8
1.5
4.3
1.5
3.6
1.5
3.2
ns
t
PHL
X
A
X
to
X
Y
X
R
L
= 500
t
PZH
Output Enable Time
1.5
10.0
1.5
6.2
1.5
5.8
1.5
4.8
1.5
4.4
ns
t
PZL
xOE to xAx or xYx
t
PHZ
Output Disable Time
(3)
1.5
9.5
1.5
5.6
1.5
5.2
1.5
4.3
1.5
4.3
ns
t
PLZ
xOE to xAx or xYx
t
SK
(o)
Output Skew
(4)
--
0.5
--
0.5
--
0.5
--
0.5
--
0.5
ns
PI74FCT162H540T Switching Characteristics over Operating Range (Advance Information)
162H540T 162H540AT 162H540CT 162H540DT 162H540ET
Com.
Com.
Com.
Com.
Com.
Parameters
Description
Conditions
(1)
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Unit
t
PLH
Propagation Delay
C
L
= 50 pF
1.5
8.0
1.5
4.8
1.5
4.3
1.5
3.6
1.5
3.2
ns
t
PHL
X
A
X
to
X
Y
X
R
L
= 500
t
PZH
Output Enable Time
1.5
10.0
1.5
6.2
1.5
5.8
1.5
4.8
1.5
4.4
ns
t
PZL
xOE to xAx or xYx
t
PHZ
Output Disable Time
(3)
1.5
9.5
1.5
5.6
1.5
5.2
1.5
4.3
1.5
4.3
ns
t
PLZ
xOE to xAx or xYx
t
SK
(o)
Output Skew
(4)
--
0.5
--
0.5
--
0.5
--
0.5
--
0.5
ns
Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not production tested.
4. Skew between any two outputs, of the same package, switching in the same direction.
This parameter is guaranteed by design.
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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