PI74LCX241
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Fast CMOS 3.3V 8-Bit
Buffer/Line Driver
Product Features
• Functionally compatible with FCT3, LVT, and
74 series 241 families of products
• Tri-State outputs
• 5V Tolerant inputs and outputs
• 2.0V-3.6V V
CC
supply operation
• Balanced sink and source output drives (24 mA)
• Low ground bounce 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)
Product Description
Pericom Semiconductor’s PI74LCX series of logic circuits are
produced in the Company’s advanced 0.6 micron CMOS technology
achieving high speed while maintaining low power operation.
The PI74LCX241 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.
The PI74LCX241 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.
Logic Block Diagram
Product Pin Configuration
OE
A
DA
0
OB
0
DA
1
OB
1
DA
2
OB
2
DA
3
OB
3
GND
Product Pin Description
Pin Name Description
1
20
2
19
3
18
4
20-PIN
17
H20
16
5
L20
15
6
Q20
7
14
S20
8
13
9
12
10
11
V
CC
OE
B
OA
0
DB
0
OA
1
DB
1
OA
2
DB
2
OA
3
DB
3
OE
A
, OE
B
D
XX
O
XX
GND
V
CC
3-State Output Enable
Inputs (Active LOW)
Inputs
Outputs
Ground
Power
Truth Table
(1)
Inputs
OE
A
L
L
H
OE
B
H
H
L
D
XX
L
H
X
Outputs
O
XX
L
H
Z
Note:
1. H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Z = High Impedance
1
PS2097A 02/12/97
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 de-
vice. This is a stress rating only and functional opera-
tion 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.
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LCX241
3.3V 8-BIT BUFFER/LINE DRIVER
Recommended Operating Conditions
Symbol
V
CC
Parameter
Supply Voltage
Operating
Data Retention
V
I
V
O
Input Voltage
Output Voltage
HIGH or LOW State
TRI-State
I
OH
/I
OL
Output Current
V
CC
= 3.0V-3.6V
V
CC
= 2.7V
T
A
Free-Air Operating Temperature
Input Edge Rate
V = 0.8V-2.0V, V
CC
= 3.0V
Min.
2.0
1.5
0
0
0
−
40
0
Max.
3.6
3.6
5.5
V
CC
5.5
±24
±12
+85
10
°C
ns/V
mA
V
Units
∆
t/
∆
V
2
PS2097A 02/12/97
Capacitance
Parameters
C
IN
C
OUT
C
PD
Description
Input Capacitance
Output Capacitance
Power Dissipation Capacitance
Test Conditions
V
CC
= Open, V
I
= 0V or V
CC
V
CC
= 3.3V, V
I
= 0V or V
CC
V
CC
= 3.3V, V
I
= 0V or V
CC
, F = 10 MHz
Typ.
7
8
25
pF
Units
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LCX241
3.3V 8-BIT BUFFER/LINE DRIVER
DC Electrical Characteristics
(Over the Operating Range, T
A
=
−40°C
to +85°C, V
CC
= 2.7V to 3.6V)
Parameters
V
IH
V
IL
V
OH
Description
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= 2.7-3.6
V
CC
= 2.7
V
CC
= 3.0
I
OH
= –0.1mA
I
OH
= –12mA
I
OH
= –18mA
I
OH
= –24mA
V
OL
Output LOW Voltage
V
CC
= 2.7-3.6
V
CC
= 2.7
V
CC
= 3.0
I
OL
= 0.1mA
I
OL
= 12mA
I
OL
= 16mA
I
OL
= 24mA
V
IK
I
I
I
OZ
I
OFF
I
CC
Clamp Diode Voltage
Input Leakage Current
Tri-State Output Leakage
Power Down Disable
Quiescent Power Supply Current
Quiescent Power Supply Current
TTL Inputs HIGH
V
CC
= Min., I
IN
= –18mA
0
≤
V
I
≤
5.5V
0
≤
V
O
≤
5.5V
V
I
= V
IH
or V
IL
Vcc = 2.7-3.6
V
CC
= 2.7-3.6
Min.
2.0
—
V
CC
-0.2
2.2
2.4
2.2
—
—
—
—
—
—
—
—
Typ
(2)
—
—
—
—
—
—
—
—
—
—
−
0.7
—
—
—
0.1
Max.
—
0.8
—
—
—
—
0.2
0.4
0.4
0.55
−
1.2
±5
±5
10
10
500
µA
V
Units
V
CC
= 0V, V
IN
or V
OUT
≤
5.5V
V
CC
= Max.
V
CC
= Max.
V
IN
= GND or V
CC
V
IN
= V
CC
–0.6V
(3)
∆
I
CC
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
= 3.3V, +25°C ambient.
3. Per TTL driven input; all other inputs at V
CC
or GND.
3
PS2097A 02/12/97
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74LCX241
3.3V 8-BIT BUFFER/LINE DRIVER
Switching Characteristics over Operating Range
V
CC
= 3.3V ± 0.3V
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK
(
O
)
Description
Propagation Delay
D
XX
to O
XX
Output Enable time
Output Disable Time
Output Skew
(1)
Conditions
C
L
= 50pF
R
L
= 500
Ω
Min.
1.5
1.5
1.5
Max.
6.5
8.0
7.0
1.0
V
CC
= 2.7V
Min.
1.5
1.5
1.5
Max.
7.5
9.0
ns
8.0
Units
Note:
1. Skew between any two outputs, of the same package, switching in the same direction.
Dynamic Switching Characteristics
(T
A
= +25°C)
Parameters
V
OLP
V
OLV
Description
Dynamic LOW Peak Voltage
Dynamic LOW Valley Voltage
Test Conditions
(1)
V
CC
= 3.3V, C
L
= 50 pF
V
IH
= 3.3V, V
IL
= 0V
0.8
V
CC
= 3.3V, C
L
= 50 pF
V
IH
= 3.3V, V
IL
= 0V
V
Typ.
Units
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS2097A 02/12/97
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