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PI74FCT162Q244T
LOW NOISE 16-BIT BUFFER/LINE DRIVER
1
PS2049A 04/12/96
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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 PI74FCT162Q244T is a non-inverting 16-bit buffer/line driver
designed for bus interface applications where low noise operation
is essential.
The PI74FCT162Q244T is designed with current limiting resistors
at its outputs to control the output edge rate resulting in lower
ground bounce and undershoot. This device features a typical
output impedance of 35
, eliminating the need for external
terminating resistors for most bus interface applications. This noise
suppression benefit is designated by the letter "Q" (for quiet) in the
part number.
The PI74FCT162Q244T also features "Bus Hold" which retains
the input's last state whenever the input goes to high-impedance
preventing "floating" inputs and eliminating the need for pullup/
down resistors.
This high-speed, low power device also features 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.
PI74FCT162Q244T
Fast, Low Noise CMOS 16-Bit
Buffer/Line Driver
Product Features:
V
CC
= 5V 10%
Balanced output drivers:
12 mA
Output impedance:
35
(typical)
Typical V
OLP
(Output Ground Bounce) < 0.5V
at V
CC
= 5V, T
A
= 25C
Bus Hold retains last active bus state during tri-state
Hysteresis on all inputs
Packages available:
48-pin 240 mil wide plastic TSSOP (A)
48-pin 300 mil wide plastic SSOP (V)
48-pin 150 mil wide plastic BQSOP (B)
Device models available on request
Logic Block Diagram
1
OE
1
A
0
1
Y
0
1
A
1
1
Y
1
1
A
2
1
Y
2
1
A
3
1
Y
3
3
OE
3
A
0
3
Y
0
3
A
1
3
Y
1
3
A
2
3
Y
2
3
A
3
3
Y
3
2
OE
2
A
0
2
Y
0
2
A
1
2
Y
1
2
A
2
2
Y
2
2
A
3
2
Y
3
4
OE
4
A
0
4
Y
0
4
A
1
4
Y
1
4
A
2
4
Y
2
4
A
3
4
Y
3
PI74FCT162Q244T
LOW NOISE 16-BIT BUFFER/LINE DRIVER
2
PS2049A 04/12/96
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Product Pin Description
Pin Name
Description
xOE
3-State Output Enable Inputs (Active LOW)
xAx
Inputs
(1)
xYx
3-State Outputs
GND
Ground
V
CC
Power
Inputs
(1)
Outputs
(1)
X
OE
xAx
xYx
L
L
L
L
H
H
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
Note:
1. For the PI74FCT162Q244T, these pins have "Bus
Hold." All other pins are standard, outputs, or I/Os.
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
1
Y
0
1
Y
1
GND
1
Y
2
1
Y
3
V
CC
2
Y
0
2
Y
1
GND
2
Y
2
2
Y
3
3
Y
0
3
Y
1
GND
3
Y
2
3
Y
3
V
CC
4
Y
0
4
Y
1
GND
4
Y
2
4
Y
3
4
OE
2
OE
1
A
0
1
A
1
GND
1
A
2
1
A
3
V
CC
2
A
0
2
A
1
GND
2
D
2
2
A
3
3
A
0
3
A
1
GND
3
A
2
3
A
3
V
CC
4
A
0
4
A
1
GND
4
A
2
4
A
3
3
OE
48-PIN
V48
A48
B48
PI74FCT162Q244T
LOW NOISE 16-BIT BUFFER/LINE DRIVER
3
PS2049A 04/12/96
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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
Bus Hold Input
(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
Bus Hold Input
(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
High Impedance
V
CC
= Max.
V
OUT
= V
CC
1
A
I
OZL
Output Current
V
CC
= Max.
V
OUT
= GND
1
A
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18 mA
0.7
1.2
V
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 V
CC
= 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.
PI74FCT162Q244T
LOW NOISE 16-BIT BUFFER/LINE DRIVER
4
PS2049A 04/12/96
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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
= 12.0 mA
2.4
3.3
--
V
V
OL
Output LOW Voltage
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OL
= 12 mA
--
0.4
0.55
V
Output Drive Characteristics
(Over the Operating Range)
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
ODL
Output LOW Current
V
CC
= 5V, V
IN
= V
IH
OR
V
IL
, V
OUT
= 1.5V
(3)
36
--
--
mA
I
ODH
Output HIGH Current
V
CC
= 5V, V
IN
= V
IH
OR
V
IL
, V
OUT
= 1.5V
(3)
-100
-166
-200
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 V
CC
= 5.0V, +25C ambient and maximum loading.
3. Not more than one output should be tested 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
PI74FCT162Q244T
LOW NOISE 16-BIT BUFFER/LINE DRIVER
5
PS2049A 04/12/96
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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 V
CC
= 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.
PI74FCT162Q244T
LOW NOISE 16-BIT BUFFER/LINE DRIVER
6
PS2049A 04/12/96
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Switching Characteristics over Operating Range
162Q244T
162Q244AT
162Q244CT
162Q244DT
162Q244ET
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
6.5
1.5
4.8
1.5
4.1
1.5
3.8
1.5
3.2
ns
t
PHL
X
A
X
to
X
Y
X
R
L
= 500
t
PZH
Output Enable Time
1.5
8.0
1.5
6.2
1.5
5.8
1.5
4.8
1.5
4.4
ns
t
PZL
X
OE to
X
A
X
or
X
Y
X
t
PHZ
Output Disable Time
(3)
1.5
7.0
1.5
5.6
1.5
5.2
1.5
4.0
1.5
4.0
ns
t
PLZ
X
OE to
X
A
X
or
X
Y
X
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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