PERICOM PI74LPT541

PI74LPT541
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Fast CMOS 3.3V 8-Bit
Buffer/Line Driver
Product Features
Product Description
• Compatible with LCX™ and LVT™ families of products
• Supports 5V I/O 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 (24mA sink and source)
• Low ground bounce outputs
• Hysteresis on all inputs
• Industrial operating temperature range: –40°C to +85°C
• Packages available:
– 20-pin 173 mil wide plastic TSSOP (L)
– 20-pin 150 mil wide plastic QSOP (Q)
– 20-pin 150 mil wide plastic TQSOP (R)
– 20-pin 300 mil wide plastic SOIC (S)
Pericom Semiconductor’s PI74LPT series of logic circuits are produced using the Company’s advanced 0.6 micron CMOS
technology, achieving industry leading speed grades.
Logic Block Diagram
OEA
The PI74LPT541 is an 8-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 offers
a flow-through organization for ease of board layout.
The PI74LPT541, which can be driven from either 3.3V or 5.0V
devices, can be used as a translator in mixed 3.3/5.0V systems.
Product Pin Configuration
OEB
D0
O0
D1
O1
D2
O2
D3
O3
OEA
D0
D1
D2
D3
D4
D5
D6
D7
GND
20
1
19
2
18
3
4 20-PIN 17
L20 16
5
Q20 15
6
R20
14
7
S20
13
8
12
9
11
10
Vcc
OEB
O0
O1
O2
O3
O4
O5
O6
O7
Product Pin Description
Pin Name
OEA, OEB
D7-D0
O7-O0
GND
VCC
Description
3-State Output Enable
Inputs (Active LOW)
Inputs
Outputs
Ground
Power
Truth Table(1)
D4
O4
D5
O5
D6
O6
D7
O7
OEA
L
L
H
Inputs
OEB
L
L
H
DX
L
H
X
Outputs
OX
L
H
Z
Notes:
1. H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Z = High Impedance
1
PS2061B
01/18/99
PI74LPT541
3.3V
8-BIT
BUFFER/LINE
DRIVER
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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 = 2.7V to 3.6V)
Parameters
IOZH
IOZL
VIK
IODH
IODL
VOH
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
VIH
VIL
IIH
IIL
Test Conditions(1)
Description
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
Min.
Typ(2)
Max.
Units
2.2
2.0
–0.5
—
—
—
5.5
5.5
0.8
V
V
V
—
—
—
—
—
—
–0.7
–60
90
—
3.0
3.0
—
—
0.2
0.3
–60
±1
±1
±1
±1
±1
±1
–1.2
–110
200
—
—
—
—
0.2
0.4
0.5
–85
µA
µA
µA
µA
µA
µA
V
mA
mA
V
V
V
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 = –18mA
—
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3)
–36
VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3)
50
VCC = Min.
IOH = –0.1mA Vcc-0.2
VIN = VIH or VIL
IOH = –3mA
2.4
VCC = 3.0V,
IOH = –8mA
2.4(5)
VIN = VIH or VIL
IOH = –24mA
2.0
VCC = Min.
IOL = 0.1mA
—
VIN = VIH or VIL
IOL = 16mA
—
IOL = 24mA
—
VCC = Max.(3), VOUT = GND
V
V
V
–240
IOS
Short Circuit Current(4)
mA
IOFF
Power Down Disable
VCC = 0V, VIN or VOUT ≤ 4.5V
—
—
±100
µA
VH
Input Hysteresis
—
150
—
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.
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1)
CIN
COUT
Description
Test Conditions
Input Capacitance
Output Capacitance
VIN = 0V
VOUT = 0V
Typ.
Max.
Units
4.5
5.5
6
8
pF
pF
Note:
1. This parameter is determined by device characterization but is not production tested.
2
PS2061B
01/18/99
PI74LPT541
3.3V
8-BIT
BUFFER/LINE
DRIVER
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Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min.
Typ.(2)
Max.
Units
µA
ICC
Quiescent Power Supply Current
VCC = Max.
VIN = GND or VCC
0.1
10
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = VCC – 0.6V(3)

100
ICCD
Dynamic Power Supply(4)
VCC = Max.,
Outputs Open
OEX = 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
OEX = GND
One Bit Toggling
VIN = VCC – 0.6V
VIN = GND
0.6
2.3
mA
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
OEX = GND
8 Bits Toggling
VIN = VCC – 0.6V
VIN = GND
2.1
4.7(5)
Notes:
1. For Max. 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.
3
PS2061B
01/18/99
PI74LPT541
3.3V
8-BIT
BUFFER/LINE
DRIVER
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Switching Characteristics over Operating Range(1)
LPT541
LPT541A
Com.
Parameters
(2)
(3)
LPT541C
Com.
Max.
Com.
Max.
Min.
(3)
Description
Conditions
Min.
tPLH
tPHL
Propagation Delay
DX to OX
CL = 50pF
RL = 500Ω
1.5
6.0
1.5
4.8
1.5
4.1
tPZH
tPZL
Output Enable Time
OEx to Ox
1.5
9.5
1.5
6.2
1.5
5.8
tPHZ
tPLZ
Output Disable Time(4)
OEx to Ox
1.5
6.5
1.5
5.6
1.5
5.2
tSK(o)
Output Skew(5)
0.5
Min.
(3)
Max.
0.5
Units
ns
0.5
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 waveforms.
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS2061B
01/18/99