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| PI74LCX245 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 Fast CMOS 3.3V 8-Bit Bidirectional Transceiver Product Features * Functionally compatible with FCT3, LVT, and 74 series 245 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 * 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 PI74LCX245 is an 8-bit bidirectional transceiver designed for asynchronous two-way communication between data buses. The transmit/receive input pin (T/R) determines the direction of data flow through the bidirectional transceiver. Transmit (active HIGH) enables data from A ports to B ports, and receive (active LOW) from B ports to A ports. The output enable (OE) input, when HIGH, disables both A and B ports by placing them in HIGH Z condition. The PI74LCX245 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 T/R OE A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 1A5 Product Pin Configuration Product Pin Description Pin Name OE Description 3-State Output Enable Inputs (Active LOW) Direction Control Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs Ground Power 20-PIN H20 L20 Q20 S20 T/R A0-A7 B0-B7 GND VCC Truth Table(1) Inputs (1) B5 A6 B6 A7 B7 OE L L H T/R L H X Outputs (1) Bus B Data to Bus A Bus A Data to Bus B High State Z Note: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance 1 PS2099A 02/13/97 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI74LCX245 3.3V 8-BIT BIDIRECTIONAL TRANSCEIVER 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 Symbol VCC Parameter Supply Voltage Operating Data Retention VI VO Input Voltage Output Voltage HIGH or LOW State TRI-State IOH/IOL Output Current VCC = 3.0V-3.6V VCC = 2.7V TA Free-Air Operating Temperature Input Edge Rate V = 0.8V-2.0V, VCC = 3.0V Min. 2.0 1.5 0 0 0 -40 0 Max. 3.6 3.6 5.5 VCC 5.5 24 12 +85 10 mA C ns/V V Units t/V 2 PS2099A 02/13/97 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 Typical 7 8 25 pF Units 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI74LCX245 3.3V 8-BIT BIDIRECTIONAL TRANSCEIVER DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 2.7V to 3.6V) Parameters Description VIH VIL VOH Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = 2.7-3.6 VCC = 2.7 VCC = 3.0 IOH = -0.1mA IOH = -12mA IOH = -18mA IOH = -24mA VOL Output LOW Voltage VCC = 2.7-3.6 VCC = 2.7 VCC = 3.0 IOL = 0.1mA IOL = 12mA IOL = 16mA IOL = 24mA VIK II IOZ IOFF ICC Clamp Diode Voltage Input Leakage Current Tri-State Output Leakage Power Down Disable Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH VCC = Min., IIN = -18mA 0 VI 5.5V 0 VO 5.5V VI = VIH or VIL Vcc = 2.7-3.6 VCC = 2.7-3.6 Min. 2.0 -- VCC-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 Units V VCC = 0V, VIN or VOUT 5.5V VCC = Max. VCC = Max. VIN = GND or VCC VIN = VCC - 0.6V(3) 10 10 500 A ICC 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. 3 PS2099A 02/13/97 Switching Characteristics over Operating Range VCC = 3.3V 0.3V Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ tSK(O) Description Propagation Delay DXX to OXX Output Enable time Output Disable Time Output Skew(1) Conditions CL = 50pF RL = 500 Min. 1.5 1.5 1.5 Max. 7.0 8.5 7.5 1.0 VCC = 2.7V Min. 1.5 1.5 1.5 Max. 8.0 9.5 ns 8.5 Units 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 PI74LCX245 3.3V 8-BIT BIDIRECTIONAL TRANSCEIVER Notes: 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) VCC = 3.3V, CL = 50pF VIH = 3.3V, VIL = 0V 0.8 VCC = 3.3V, CL = 50pF VIH = 3.3V, VIL = 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 PS2099A 02/13/97 |
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