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PI74LCX16244
Fast CMOS 3.3V 16-Bit Buffer/Line Driver
Features
* Functionally compatible with FCT3, LVT, and 74 series 16244 families of products * 3-State outputs * 5V Tolerant inputs and outputs * 2.0V-3.6V VCC supply operation * Balanced sink and source output drives (24mA) * 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: - 48-pin 240-mil wide plastic TSSOP (A) - 48-pin 300-mil wide plastic SSOP (V)
Description
Pericom Semiconductor's PI74LCX16244 is a 16-bit buffer/line driver designed for driving 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 three-state controls to operate in a Quad-Nibble, Dual-Byte, or a single 16-bit word mode. The PI74LCX16244 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.
Block Diagram
1OE
3OE
1A0
1Y0
3A0
3Y0
1A1
1Y1
3A1
3Y1
1A2
1Y2
3A2
3Y2
1A3
1Y3
3A3
3Y3
2OE
4OE
2A0
2Y0
4A0
4Y0
2A1
2Y1
4A1
4Y1
2A2
2Y2
4A2
4Y2
2A3
2Y3
4A3
4Y3
1
PS2087D
09/16/04
PI74LCX16244 3.3V 16-Bit Buffer/Line Driver Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................. -65C to +150C Ambient Temperature with Power Applied ............................ -40C to +85C 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
Parameter VCC VI VO IOH/IOH TA t/V Supply Voltage Input Voltage Output Voltage Output Current Operating Temperature Input Edge Rate V = 0.8V - 2.0V, VCC = 3.0V HIGH or LOW state 3-state VCC = 3.0V - 3.6V VCC = 2.7V -40 0 Description Operating Data Retention Min. 2.0 1.5 0 0 0 Max. 3.6 3.6 5.5 VCC 5.5 24 12 85 10 mA C ns/V V Units
2
PS2087D
09/16/04
PI74LCX16244 3.3V 16-Bit Buffer/Line Driver Pin Description
Pin Name
XOE XAX XYX
Truth Table(1)
Description Inputs
XOE XAX
Output
XYX
3-State Output Enable Inputs (Active LOW) Inputs 3-State Outputs Ground Power
L L H
L H X
L H Z
GND VCC
Note: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance
Pin Configuration
1OE 1Y0 1Y1
1 2 3 4 5 6 7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
2OE 1A0 1A1
GND
1Y2 1Y3
GND
1A2 1A3
VCC
2Y0 2Y1
VCC
2A0 2A1
GND
2Y2 2Y3 3Y0 3Y1
GND
2A2 2A3 3A0 3A1
GND
3Y2 3Y3
GND
3A2 3A3
VCC
4Y0 4Y1
VCC
4A0 4A1
GND
4Y2 4Y3 4OE
GND
4A2 4A3 3OE
3
PS2087D
09/16/04
PI74LCX16244 3.3V 16-Bit Buffer/Line Driver
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 2.7V to 3.6V)
Parameters VIH VIL Description Input HIGH Voltage Input LOW Voltage Test Conditinos(1) Min. 2.0 0.8 VCC -0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 -0.7 -1.2 5 5 10 0.1 10 500 A V Typ. Max. Units Guaranteed Logic HIGH Level Guaranteed Logic LOWLevel VCC = 2.7 - 3.6 VOH Output HIGH Voltage VCC = 2.7 VCC = 3.0 VCC =2.7 - 3.6 VOL Output LOW Voltage VCC = 2.7 VCC = 3.0 VIK II IOZ IOFF ICC ICC Clamp Dioide Voltage Input Leakage Current Tri-State Output Leakage Power Down Disable Quiescent Power supply current Quiescent Power supply current TTL Inputs High IOH = -0.1mA IOH = -12mA IOH = -18mA IOH = -24mA IOL = 0.1mA IOL = 12mA IOL = 16mA IOL = 24mA VCC = 2.7 -3.6 VCC = 2.7 -3.6 VIN = GND or VCC VIN = VCC =0.6V(3)
VCC = Min., IIN = -18mA 0 VI 5.5V 0 VO 5.5V VI = VIH or VIL VCC = Max. VCC = MAx.
VCC = 0V, VIN or VOUT 5.5V
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, +25C ambient. 3. Per TTL driven input; all other inputs at Vcc or GND.
Capacitance
Parameters CIN COUT CPD Description Input Capacitance Output Capacitance Power Dissipation Capacitance Test Conditions VCC = Open, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC VCC = 3.3V, VI = 0V or VCC, F = 10 MHz Typ. 3 3 20 pF Units
4
PS2087D
09/16/04
PI74LCX16244 3.3V 16-Bit Buffer/Line Driver Switching Characteristics over Operating Range
Parameters tPHL tPZH tPHZ tsk(0) Description Propagation Delay, DXX to OXX Output Enable time Output Disable time Output Skew(1) CL = 50pF RL = 500 Test Conditions VCC = 3.3V0.3 Min. 1.5 1.5 1.5 Max. 4.5 5.5 5.4 1.0 VCC = 2.7V Min. 1.5 1.5 1.5 Max. 5.2 6.3 5.7 ns Units
Note: 1. Skew between any two outputs, of the same package, switching in the same direction.
Dynamic Switching Characteristics (TA = +25C)
Parameters VOLP VOLV Description Dynamic LOW peak voltage Dynamic LOW valley voltage
Test Conditions(1)
Typ. 0.8
Units V
VCC = 3.3C, CL = 50pF, VIH = 3.3V, VIL = 0V
Note: 1. Measured with 15 outputs switching from High-to-Low or Low-to-High. The remaining output is measured in the LOW state.
5
PS2087D
09/16/04
PI74LCX16244 3.3V 16-Bit Buffer/Line Driver Packaging Mechanical: 48-Pin TSSOP (A)
48
.236 .244
6.0 6.2
1
.488 12.4 .496 12.6
.047 1.20 Max
SEATING PLANE
.004 0.09 .008 0.20
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010
0.17 0.27
.002 .006 0.05 0.15
0.45 .018 0.75 .030
.319 BSC 8.1
Packaging Mechanical: 48-Pin SSOP (V)
48
.291 .299 7.39 7.59
.395 .420 10.03 10.67
Gauge Plane
.010 0.25
1
.02 0.51 .04 1.01
.620 .630 15.75 16.00
.008 0.20 Nom.
.015 0.381 x 45 .025 0.635
.110 2.79 Max
.025 BSC 0.635
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
.008 0.20 .0135 0.34
0-8
.008 0.20 .016 0.40
Ordering Information
Ordering Code PI74LCX16244A PI74LCX16244V Package Code A V Package Description 48-pin 240-mil wide plastic TSSOP 48-pin 300-mil wide plastic SSOP
Notes: 1. Thermal characteristics can be found on the web at www.pericom.com/packaging/
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
6
PS2087D 09/16/04

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