PERICOM PI74LPT16244

PI74LPT16244
3.3V,
16-Bit
Buffer/Line
Driver
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Product Features:
• Compatible with LCX™ and LVT™ families of products
• Supports 5V Tolerant Mixed Signal Mode Operation
– Input can be 3V or 5V
– Output can be 3V or connected to 5V bus
• Advanced Low Power CMOS Operation
• Excellent output drive capability:
Balanced drives (24 mA sink and source)
• Pin compatible with industry standard double-density
pinouts
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Multiple center pins and distributed Vcc/GND pins
minimize switching noise
• Packages available:
– 48-pin 240 mil wide thin plastic TSSOP (A)
– 48-pin 300 mil wide plastic SSOP (V)
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Product Description:
Pericom Semiconductor’s PI74LPT series of logic circuits are produced in the Company’s advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74LPT16244 is a 16-bit buffer/line driver designed for driving
high capacitive memory loads. With its balanced-drive characteristics,
this high-speed, low power device provides lower ground bounce,
transmission line matching of signals, fewer line reflections and
lower EMI and RFI effects. This makes it ideal for driving on-board
buses and transmission lines. This device is designed with threestate controls to operate in a Quad-Nibble, Dual-Byte, or a single 16bit word mode.
The PI74LPT16244 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
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4
5
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Logic Block Diagram
1OE
7
3OE
1A0
1Y0
3A0
3Y0
8
1A1
1Y1
3A1
3Y1
9
1A2
1Y2
3A2
3Y2
10
1A3
1Y3
3A3
3Y3
11
2OE
12
4OE
2A0
2Y0
4A0
4Y0
13
2A1
2Y1
4A1
4Y1
14
2A2
2Y2
4A2
4Y2
2A3
2Y3
4A3
4Y3
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PS2067A
01/15/97
PI74LPT16244
3.3V,
16-Bit
Buffer/Line
Driver
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Product Pin Description
Pin Name
xOE
xAx
xYx
GND
VCC
Truth Table
Inputs(1)
Description
3-State Output Enable Inputs (Active LOW)
Inputs
3-State Outputs
Ground
Power
XOE
L
L
H
Outputs(1)
xYx
L
H
Z
xAx
L
H
X
Note:
1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
Product Pin Configuration
1OE
1
48
2OE
1Y0
2
47
1 A0
1Y1
3
46
1 A1
GND
4
45
GND
1Y2
5
44
1 A2
1Y3
6
43
1 A3
VCC
7
42
VCC
2Y0
8
41
2 A0
2Y1
9
40
2 A1
GND
10
39
GND
2Y2
11
38
2 A2
2Y3
12
37
2 A3
3Y0
13
36
3 A0
3Y1
14
35
3 A1
GND
15
34
GND
3Y2
16
33
3 A2
3Y3
17
32
3 A3
VCC
18
31
VCC
4Y0
19
30
4 A0
48-PIN
48-PIN
V48
V48
A48
A48
4Y1
20
29
4 A1
GND
21
28
GND
4Y2
22
27
4 A2
4Y3
23
26
4 A3
4OE
24
25
3OE
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
6
8
pF
pF
Note:
1. This parameter is determined by device characterization but is not production tested.
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PS2067A 01/15/97
PI74LPT16244
3.3V,
16-Bit
Buffer/Line
Driver
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Maximum Ratings
1
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ............................................................ –55°C to +125°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 ............................................................................ 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.
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DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V)
Parameters
VIH
VIL
IIH
IIL
IOZH
IOZL
VIK
IODH
IODL
VOH
Test Conditions(1)
Description
Input HIGH Voltage (Input pins)
Input HIGH Voltage (I/O pins)
Input LOW Voltage
(Input and I/O pins)
Input HIGH Current (Input pins)
Input HIGH Current (I/O pins)
Input LOW Current (Input pins)
Input LOW Current (I/O pins)
High Impedance Output Current
(3-State Output pins)
Clamp Diode Voltage
Output HIGH Current
Output LOW Current
Output HIGH Voltage
VOL
Output LOW Voltage
IOS
IOFF
VH
Short Circuit Current(4)
Power Down Disable
Input Hysteresis
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
VCC = Max.
VIN = 5.5V
VCC = Max.
VIN = VCC
VCC = Max.
VIN = GND
VCC = Max.
VIN = GND
VCC = Max.
VOUT = 5.5V
VCC = Max.
VOUT = GND
VCC = Min., IIN = –18 mA
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3)
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3)
VCC = Min.
IOH = –0.1 mA
VIN = VIH or VIL
IOH = –3 mA
VCC = 3.0V,
IOH = –8 mA
VIN = VIH or VIL
IOH = –24 mA
VCC = Min.
IOL = 0.1 mA
VIN = VIH or VIL
IOL = 16 mA
IOL = 24 mA
VCC = Max.(3), VOUT = GND –60
VCC = 0V, VIN or VOUT £ 4.5V
Min.
Typ(2)
Max.
Units
2.2
2.0
–0.5
—
—
—
5.5
5.5
0.8
V
V
V
—
—
—
—
—
—
—
–36
50
Vcc-0.2
2.4
2.4(5)
2.0
—
—
—
–85
—
—
—
—
—
—
—
—
–0.7
–60
90
—
3.0
3.0
—
—
0.2
0.3
–240
—
150
±1
±1
±1
±1
±1
±1
–1.2
–110
200
—
—
—
—
0.2
0.4
0.5
mA
±100
—
µA
µA
µA
µA
µA
µA
V
mA
mA
V
V
V
V
V
V
µA
mV
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 = 3.3V, +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.
4. This parameter is guaranteed but not tested.
5. VOH = VCC – 0.6V at rated current.
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PS2067A
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01/15/97
PI74LPT16244
3.3V,
16-Bit
Buffer/Line
Driver
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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
10
µA
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = VCC – 0.6V(3)
2.0
30
µA
ICCD
Dynamic Power Supply(4)
VCC = Max.,
Outputs Open
XOE = GND
One Bit Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
50
75
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 – 0.6V
VIN = GND
0.5
0.8
mA
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
XOE = GND
16 Bits Toggling
VIN = VCC – 0.6V
VIN = GND
2.0
3.3(5)
Notes:
1. ForMax. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 3.3V, +25°C ambient.
3. Per TTL driven input; 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 + ∆ICC DHNT + ICCD (fCP/2 + fINI)
ICC = Quiescent Current (ICCL, ICCH and ICCZ)
∆ICC = Power Supply Current for a TTL High Input
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)
NCP = Number of Clock Inputs at fCP
fI = Input Frequency
NI = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
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PS2067A 01/15/97
PI74LPT16244
3.3V,
16-Bit
Buffer/Line
Driver
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Switching Characteristics over Operating Range(1)
LPT16244
LPT16244A
Com.
Parameters
Description
Conditions
tPLH
tPHL
Propagation Delay
XAX to XYX
CL = 50 pF
RL = 500Ω
tPZH
tPZL
(2)
(3)
Min
LPT16244C
Com.
Max
(3)
Min
2
Com.
Max
(3)
Min
Max
Unit
1.5
5.2
1.5
4.8
1.5
4.1
ns
Output Enable Time
xOE to xYx
1.5
7.0
1.5
6.2
1.5
5.8
ns
tPHZ
tPLZ
Output Disable Time(4)
xOE to xYx
1.5
7.0
1.5
5.6
1.5
5.2
ns
tSK(o)
Output Skew(5)
0.5
ns
3
0.5
0.5
4
5
Notes:
1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V ±0.3V, normal range. For Vcc = 2.7V, extended range, all
Propagation Delays and Enable/Disable times should be degraded by 20%.
2. See test circuit and wave forms.
3. Minimum limits are guaranteed but not tested on Propagation Delays.
4. This parameter is guaranteed but not production tested.
5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
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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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PS2067A
01/15/97