ETC PI74LCX244

PI74LCX244
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Fast CMOS 3.3V 8-Bit Buffer/Line Driver
Product Features
Product Description
• Functionally compatible with FCT3, LVT, and 74 series
244 families of products
• Tri-State outputs
• 5V Tolerant inputs and outputs
• 2.0V-3.6V VCC supply operation
• Balanced sink and source output drives (24 mA)
• Low ground bounce outputs
• Power Down High Impedance inputs and outputs
• Supports live insertion
• ESD Protection exceeds 2000V, Human Body Model
200V, Machine Model
• Packages available:
– 20-pin 209-mil wide plastic SSOP (H)
– 20-pin 173-mil wide plastic TSSOP (L)
– 20-pin 150-mil wide plastic QSOP (Q)
– 20-pin 300-mil wide plastic SOIC (S)
Pericom Semiconductor’s PI74LCX series of logic circuits are
produced using the Company’s advanced 0.6 micron CMOS
technology achieving high speed while maintaining low power
operation.
The PI74LCX244 is an 8-bit non-inverting 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.
Logic Block Diagram
Product Pin Configuration
The PI74LCX244 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed
3.3V/5.0V system.
OEA
DA0
OB0
DA1
OB1
DA2
OB2
DA3
OB3
GND
OEA
OEB
DA0
OA0
OB0
DB0
DA1
OA1
OB1
DB1
DA2
OA2
OB2
DB2
DA3
OA3
OB3
DB3
Outputs
OEA
OEB
DXX
OXX
L
L
L
L
L
L
H
H
H
H
X
Z
VCC
OEB
OA0
DB0
OA1
DB1
OA2
DB2
OA3
DB3
Product Pin Description
Truth Table(1)
Inputs
1
20
2
19
3 20-Pin 18
4
17
H20
L20
5
16
Q20
6
15
S20
7
14
8
13
9
12
10
11
Pin Name
Description
OEA, OEB
3-State Output Enable
Inputs (Active LOW)
DXX
Inputs
Note:
1. H = High Voltage Level, OXX
X = Don’t Care,
GND
L = Low Voltage Level,
VCC
Z = High Impedance
1
Outputs
Ground
Power
PS2098B
11/17/02
PI74LCX244
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 .............................................................................. 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.
Recommended Operating Conditions
Symbol
VCC
Parameter
Supply Voltage
VI
Input Voltage
VO
Output Voltage
IOH/IOL
TA
∆t/∆V
Output Current
Min.
Max.
Operating
2.0
3.6
Data Retention
1.5
3.6
0
5.5
HIGH or LOW State
0
VCC
TRI-State
0
5.5
VCC = 3.0V-3.6V

±24
VCC = 2.7V

±12
−40
+85
°C
0
10
ns/V
Free-Air Operating Temperature
Input Edge Rate
V = 0.8V-2.0V, VCC = 3.0V
2
Units
V
mA
PS2098B
11/17/02
PI74LCX244
3.3V 8-Bit Buffer/Line Driver
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DC Electrical Characteristics (Over the Operating Range, TA = −40°C to +85°C, VCC = 2.7V to 3.6V)
Parameters
Description
Test Conditions(1)
VIH
Input HIGH Voltage
VIL
VOH
VOL
Min.
Typ(2)
Max.
Guaranteed Logic HIGH Level
2.0
—
—
Input LOW Voltage
Guaranteed Logic LOW Level
—
—
0.8
Output HIGH Voltage
VCC = 2.7-3.6
IOH = –0.1 mA
VCC-0.2
—
—
VCC = 2.7
IOH = –12 mA
2.2
—
—
VCC = 3.0
IOH = –18 mA
2.4
—
—
IOH = –24 mA
2.2
—
—
VCC = 2.7-3.6
IOL = 0.1 mA
—
—
0.2
VCC = 2.7
IOL = 12mA
—
—
0.4
VCC = 3.0
IOL = 16 mA
—
—
0.4
IOL = 24 mA
—
—
0.55
Output LOW Voltage
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18 mA
—
−0.7
−1.2
II
Input Leakage Current
0 ≤ VI ≤ 5.5V
Vcc = 2.7-3.6
—
—
±5
IOZ
Tri-State Output Leakage
0 ≤ VO ≤ 5.5V
VI = VIH or VIL
VCC = 2.7-3.6
—
—
±5
IOFF
Power Down Disable
VCC = 0V, VIN or VOUT ≤ 5.5V
—
—
10
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)


500
Units
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 = 3.3V, +25°C ambient.
3. Per TTL driven input; all other inputs at Vcc or GND.
Capacitance
Parameters Description
CIN
Test Conditions
Typ.
Input Capacitance
VCC = Open, VI = 0V or VCC
7
COUT
Output Capacitance
VCC = 3.3V, VI = 0V or VCC
8
CPD
Power Dissipation Capacitance
VCC = 3.3V, VI = 0V or VCC, F = 10 MHz
25
3
PS2098B
Units
pF
11/17/02
PI74LCX244
3.3V
8-Bit
Buffer/Line
Driver
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Switching Characteristics over Operating Range
VCC = 3.3V ± 0.3V
Parameters
VCC = 2.7V
Description
Conditions
Min.
Max.
Min.
Max.
tPLH
tPHL
Propagation Delay
DXX to OXX
CL = 50 pF
RL = 500Ω
1.5
6.5
1.5
7.5
tPZH
tPZL
Output Enable time
1.5
8.0
1.5
9.0
tPHZ
tPLZ
Output Disable Time
1.5
7.0
1.5
8.0
Output Skew(1)

1.0


tSK(O)
Units
ns
Note:
1. Skew between any two outputs, of the same package, switching in the same direction.
Dynamic Switching Characteristics (TA = +25°C)
Parameters
Description
Test Conditions(1)
VOLP
Dynamic LOW Peak Voltage
VCC = 3.3V, CL = 50 pF
VIH = 3.3V, VIL = 0V
VOLV
Dynamic LOW Valley Voltage
VCC = 3.3V, CL = 50 pF
VIH = 3.3V, VIL = 0V
Typ.
Units
0.8
V
Note:
1. Measured with n–1 outputs switching from High-to-Low or Low-to-High. The remaining output is measured in the LOW state.
4
PS2098B
11/17/02
PI74LCX244
3.3V 8-Bit Buffer/Line Driver
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Packaging Mechanical: 20-pin SSOP (H-package)
20
.197
.220
5.00
5.60
1
.004
.009
.272
.295
6.90
7.50
0.55 .022
0.95 .037
.078
2.00 Max
SEATING
PLANE
.291
.322
7.40
8.20
.002
Min
0.050
.0098
Max.
0.25
.0256
BSC
0.65
0.09
0.25
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Packaging Mechanical: 20-pin TSSOP (L-package)
20
.169
.177
4.3
4.5
1
.252
.260
6.4
6.6
.0256
BSC
0.65
.004 0.09
.008 0.20
.047
1.20
Max
.007
.012
0.19
0.30
0.45
0.75
SEATING
PLANE
.018
.030
.238
.269
6.1
6.7
.002 0.05
.006 0.15
X.XX
X.XX
5
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
PS2098B
11/17/02
PI74LCX244
3.3V
8-Bit
Buffer/Line
Driver
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Packaging Mechanical: 20-pin QSOP (Q-package)
20
.008
0.20
MIN.
.150
.157
.008
.013
0.20
0.33
3.81
3.99
Guage Plane
.010
0.254
1
Detail A
.337 8.56
.344 8.74
0˚-6˚
.016
.035
0.41
0.89
.041
1.04
REF
.058 REF
1.47
.015 x 45˚
0.38
.053 1.35
.069 1.75
Detail A
.007
.010
SEATING
PLANE
.016
.050
.025
BSC
0.635
.004 0.101
.010 0.254
0.178
0.254
0.41
1.27
.228
.244
5.79
6.19
.008 0.203
.012 0.305
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Packaging Mechanical : 20-pin SOIC (S-package)
20
7.40
7.60
.2914
.2992
.010
.029
0.254
x 45˚
0.737
1
.496 12.60
.511 12.99
.020 0.508
REF
.030 0.762
.013
.020
0.33
0.51
0.23
0.32
0.41 .016
1.27 .050
.0926
.1043
2.35
2.65
SEATING
PLANE
.050
BSC
1.27
.0091
.0125
0-8˚
.0040
.0118
.394
.419
10.00
10.65
0.10
0.30
X.XX DENOTES CONTROLLING
X.XX DIMENSIONS IN MILLIMETERS
Ordering Information
Orde ring Code
De s cription
PI74LCX244H
20- Pin 209- mil wide Plastic SSOP (H)
PI74LCX244L
20- Pin 173- mil wide Plastic TSSOP (L)
PI74LCX244Q
20- Pin 150- mil wide Plastic QSOP(Q)
PI74LCX244S
20- Pin 300- mil wide Plastic SSOP(S)
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
6
PS2098B
11/17/02