PI74FCT16244T
PI74FCT162244T
Fast CMOS 16-Bit Buffer/Line Drivers
Description
Features
Pericom Semiconductor’s PI74FCT16244T and PI74FCT162244T
are non-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 threestate controls to operate in a Quad-Nibble, Dual-Byte, or a single
16-bit word mode.
Common Features
• High-speed, low-power devices with high-current drive
VCC = 5V ±10%
• Hysteresis on all inputs
• Device models available upon request
PI74FCT16244T Features
• High output drive: IOH = –32mA; IOL = 64mA
• Power off disable outputs permit "live insertion"
• Typical VOLP (Output Ground Bounce)
< 1.0V at VCC = 5V, TA = 25°C
PI74FCT162244T Features
• Balanced output drivers: ±24mA
• Reduced system switching noise
• Typical VOLP (Output Ground Bounce)
< 0.6V at VCC = 5V, TA = 25°C
• Packaging (Pb-free & Green available):
– 48-pin 240-mil wide plastic TSSOP (A)
– 48-pin 300-mil wide plastic SSOP (V)
– 48-pin 173-mil wide plastic TVSOP (K)
The PI74FCT16244T output buffers are designed with a PowerOff disable allowing “live insertion” of boards when used as
backplane drivers.
The PI74FCT162244T has ±24mA 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.
Block Diagram
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PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
Product Pin Description
Pin Name
xOE
xAx
xYx
GND
VCC
Truth Table
Inputs(1)
Description
3-State Output Enable Inputs (Active LOW)
Inputs(1)
3-State Outputs
Ground
Power
XOE
L
L
H
xAx
L
H
X
Outputs(1)
xYx
L
H
Z
Note:
1. H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Z = High Impedance
Pin Configuration
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1OE
1
48
2OE
1Y0
2
47
1A0
1Y1
3
46
1A1
GND
4
45
GND
1Y2
5
44
1A2
1Y3
6
43
1A3
VCC
7
42
VCC
2Y0
8
41
2A0
2Y1
9
40
2A1
GND
10
39
GND
2Y2
11
38
2A2
2Y3
12
37
2A3
3Y0
13
36
3A0
3Y1
14
35
3A1
GND
15
34
GND
3Y2
16
33
3A2
3Y3
17
32
3A3
VCC
18
31
VCC
4Y0
19
30
4A0
4Y1
20
29
4A1
GND
21
28
GND
4Y2
22
27
4A2
4Y3
23
26
4A3
4OE
24
25
3OE
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PS2031L
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PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ........................................................ –65°C to +150°C
Ambient Temperature with Power Applied ......................... –40°C to +85°C
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 .......................................................................... 120mA
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.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5.0V ±10%)
Parameters Description
VIH
VIL
IIH
IIH
IIL
IIL
IOZH
IOZL
VIK
IOS
IO
VH
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input HIGH Current
Input LOW Current
Input LOW Current
High Impedance
Output Current
Clamp Diode Voltage
Short Circuit Current
Output Drive Current
Input Hysteresis
Test Conditions(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
Standard Input, VCC = Max.
Standard I/O, VCC = Max.
Standard Input , VCC = Min.
Standard I/O, VCC = Min.
VCC = Max.
VCC = Max.
VCC = Min., IIN = –18mA
VCC = Max.(3), VOUT = GND
VCC = Max.(3), VOUT = 2.5V
Min.
Typ.(2)
Max.
Units
0.8
1
1
–1
–1
1
–1
–1.2
–320
–180
V
V
μA
μA
μA
μA
μA
μA
V
mA
mA
mV
2.0
VIN = VCC
VIN = VCC
VIN = GND
VIN = GND
VOUT = 2.7V
VOUT = 0.5V
–80
–50
–0.7
–140
100
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, +25°C 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.
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PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
PI74FCT16244T Output Drive Characteristics (Over the Operating Range)
Parameters
Test Conditions(1)
Description
VOH
Output HIGH Voltage
VCC = Min., VIN = VIH or VIL
VOL
IOFF
Output LOW Voltage
Power Down Disable
VCC = Min., VIN = VIH or VIL
VCC = 0V, VIN or VOUT - 4.5V
IOH = –3.0mA
IOH = –15.0mA
IOH = –32.0mA
IOL = 64mA
Min.
Typ.(2)
2.5
2.4
2.0
3.5
3.5
3.0
0.2
Max.
Units
V
0.55
±100
V
μA
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, +25°C ambient and maximum loading.
PI74FCT162244T Output Drive Characteristics (Over the Operating Range)
Parameters
VOH
VOL
IODL
IODH
Test Conditions(1)
Description
Output HIGH Voltage
Output LOW Voltage
Output LOW Current
Output HIGH Current
VCC = Min., VIN = VIH or VIL
IOH = –24.0mA
VCC = Min., VIN = VIH or VIL
IOL = 24mA
VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V(3)
VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V(3)
Min.
Typ.(2)
Max.
Units
2.4
3.3
0.3
115
–115
0.55
150
–160
V
V
mA
mA
60
–60
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, +25°C 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.
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1)
CIN
COUT
Description
Test Conditions
Typ
Max.
Units
Input Capacitance
Output Capacitance
VIN = 0V
VOUT = 0V
4.5
5.5
7.5
8
pF
pF
Notes:
1. This parameter is determined by device characterization but is not production tested.
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PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min.
Typ(2)
Max.
Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
0.1
500
μA
ΔICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
0.5
1.5
mA
ICCD
Supply Current per
Input per MHz(4)
VCC = Max.,
Outputs Open
XOE = GND
One Bit Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
60
100
μA/
MHz
IC
Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
XOE = GND
One Bit Toggling
VIN = VCC
VIN = GND
0.6
1.5(5)
mA
VIN = 3.4V
VIN = GND
0.9
2.3(5)
VIN = VCC
VIN = GND
2.4
4.5(5)
VIN = 3.4V
VIN = GND
6.4
16.5(5)
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = GND
16 Bits Toggling
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, +25°C ambient.
3. Per TTL driven input (VIN = 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. IC =IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fCP/2 + fINI)
ICC = Quiescent Current
ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fI = Input Frequency
NI = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
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PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
PI74FCT16244T Switching Characteristics over Operating Range
Parameters
Description
Conditions
t PLH
t PHL
t PZH
t PZL
Propagation Delay
XAX to XYX
Output Enable Time
XOE to XYX
t PHZ
t PLZ
tSK(o)
Output Disable Time(2)
XOE to XYX
Output Skew(3)
(1)
CL = 50 pF
RL = 500Ω
16244T
16244AT
16244CT
16244ET
Com.
Com.
Com.
Com.
Min Max Min Max Min Max Min Max Units
1.5
6.5
1.5
4.8
1.5
4.1
1.5
3.2
ns
1.5
8.0
1.5
6.2
1.5
5.8
1.5
4.4
ns
1.5
7.0
1.5
5.6
1.5
5.2
1.5
4.3
ns
0.5
ns
0.5
0.5
0.5
Notes:
1. Minimum limits are guaranteed but not tested on Propagation Delays.
2. This parameter is guaranteed but not production tested.
3. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
PI74FCT162244T Switching Characteristics over Operating Range
Parameters
Description
Conditions
tPLH
tPHL
tPZH
tPZL
Propagation Delay(1)
XAX to XYX
Output Enable Time
XOE to XYX
CL = 50 pF
RL = 500Ω
tPHZ
tPLZ
tSK(o)
Output Disable Time(2)
XOE to XYX
Output Skew(3)
162244T
162244AT
162244CT
162244ET
Com.
Com.
Com.
Com.
Min Max Min Max Min Max Min Max Units
1.5
6.5
1.5
4.8
1.5
4.1
1.5
3.2
ns
1.5
8.0
1.5
6.2
1.5
5.8
1.5
4.4
ns
1.5
7.0
1.5
5.6
1.5
5.2
1.5
4.0
ns
0.5
ns
0.5
0.5
0.5
Notes:
1. Minimum limits are guaranteed but not tested on Propagation Delays.
2. This parameter is guaranteed but not production tested.
3. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
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PS2031L
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PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
Packaging Mechanical: 48-Pin, 240 mil wide Plastic TSSOP (A)
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Packaging Mechanical: 48-pin 300 mil wide plastic SSOP (V)
48
.291
.299
7.39
7.59
.395
.420
10.03
10.67
Gauge Plane
.010 0.25
.02 0.51
.04 1.01
1
.620
.630
15.75
16.00
.015 0.381 x 45˚
.025 0.635
.008
0.20
Nom.
.110 2.79 Max
.025 BSC
0.635
.008 0.20
.0135 0.34
0-8˚
.008 0.20
.016 0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
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PS2031L
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PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
Packaging Mechanical: 48-pin 173-mil wide plastic TVSOP (K)
48
.169
.177
4.30
4.50
.0035
.008
.031
.041
0.80
1.05
1
.378 9.60
.386 9.80
0.09
0.20
0.45 .018
0.75 .030
.252
BSC
6.4
SEATING
PLANE
.016
BSC
0.40
.0051
.009
0.13
0.23
.002
.006
0.05
0.15
Max.
.047
1.20
PI74FCT16244T Ordering Information
Ordering Code
PI74FCT16244TA
PI74FCT16244TAE
PI74FCT16244TV
PI74FCT16244TVE
PI74FCT16244TK
PI74FCT16244TKE
PI74FCT16244ATA
PI74FCT16244ATAE
PI74FCT16244ATV
PI74FCT16244ATVE
PI74FCT16244CTA
PI74FCT16244CTAE
PI74FCT16244CTV
PI74FCT16244CTVE
07-0059
Package Code
A
A
V
V
K
K
A
A
V
V
A
A
V
V
Speed Grade
Blank
Blank
Blank
Blank
Blank
Blank
A
A
A
A
C
C
C
C
8
Package Type
48-pin 240-mil wide TSSOP
Pb-free & Green, 48-pin 240-mil wide TSSOP
48-pin 300-mil wide SSOP
Pb-free & Green, 48-pin 300-mil wide SSOP
48-pin 173-mil wide TVSOP
Pb-free & Green, 48-pin 173-mil wide TVSOP
48-pin 240-mil wide TSSOP
Pb-free & Green, 48-pin 240-mil wide TSSOP
48-pin 300-mil wide SSOP
Pb-free & Green, 48-pin 300-mil wide SSOP
48-pin 240-mil wide TSSOP
Pb-free & Green, 48-pin 240-mil wide TSSOP
48-pin 300-mil wide SSOP
Pb-free & Green, 48-pin 300-mil wide SSOP
PS2031L
02/26/07
PI74FCT16244T/162244T
16-Bit Buffer/Line Drivers
PI74FCT162244T Ordering Information
Ordering Code
PI74FCT162244TA
PI74FCT162244TAE
PI74FCT162244TV
PI74FCT162244TVE
PI74FCT162244ATA
PI74FCT162244ATAE
PI74FCT162244ATV
PI74FCT162244ATVE
PI74FCT162244CTA
PI74FCT162244CTV
PI74FCT162244CTK
PI74FCT162244CTKE
Package Code
A
A
V
V
A
A
V
V
A
V
K
K
Speed Grade
Blank
Blank
Blank
Blank
A
A
A
A
C
C
C
C
Package Type
48-pin 240-mil wide TSSOP
Pb-free & Green, 48-pin 240-mil wide TSSOP
48-pin 300-mil wide SSOP
Pb-free & Green, 48-pin 300-mil wide SSOP
48-pin 240-mil wide TSSOP
Pb-free & Green, 48-pin 240-mil wide TSSOP
48-pin 300-mil wide SSOP
Pb-free & Green, 48-pin 300-mil wide SSOP
48-pin 240-mil wide TSSOP
48-pin 300-mil wide SSOP
48-pin 173-mil wide TVSOP
Pb-free & Green, 48-pin 173-mil wide TVSOP
Notes:
• Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
• E = Pb-free & Green
• Adding an X suffix = Tape/Reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
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