PI74FCT245T/640T/645T PI74FCT2245T/2640T/2645T Ω Series) (25Ω 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Fast CMOS Octal Bidirectional Transceivers Product Features Product Description PI74FCT245/640/645T and PI74FCT2245/2640T/2645T are pin compatible with bipolar FAST Series at a higher speed and lower power consumption 25 Ohm series resistor on all outputs (FCT2XXX only) TTL input and output levels Low ground bounce outputs Extremely low static power 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 300 mil wide plastic DIP (P) 20-pin 150 mil wide plastic QSOP (Q) 20-pin 150 mil wide plastic TQSOP (R) 20-pin 300 mil wide plastic SOIC (S) 20-pin 209 mil wide plastic SSOP (H) Device models available on request Pericom Semiconductors PI74FCT series of logic circuits are produced using the Companys advanced 0.6/0.8 micron CMOS technology, achieving industry leading speed grades. All PI74FCT2XXX devices have a built-in 25 Ohm series resistor on all outputs to reduce noise because of reflections, thus eliminating the need for an external terminating resistor. The PI74FCT245T/640T/645T and PI74FCT2245T/2640T/2645T are 8-bit wide octal buffer bidirectional transceivers designed for asynchronous two-way communication between data buses. The transmit/receive (T/R) input 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. Product Pin Configuration T/R A0 A1 A2 A3 A4 A5 A6 A7 GND Logic Block Diagram T/R OE A0 B0 1 20 2 19 3 18 4 20-Pin 17 5 L,P,Q 16 6 R,S,H 15 7 14 8 13 9 12 10 11 Vcc OE B0 B1 B2 B3 B4 B5 B6 B7 A1 Product Pin Description B1 Pin Name OE T/R A0-A7 B0-B7 GND VCC A2 B2 A3 B3 A4 B4 Description 3-State Output Enable Inputs (Active LOW) Transmit/Receive Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs Ground Power Truth Table(1) A5 B5 Inputs OE T/R L L L H H X A6 B6 A7 B7 1. FCT245, 2245, 645, 2645 are non-inverting options. FCT640 & FCT2640 are inverting options. 2. 1 Outputs Bus B Data to Bus A(2) Bus A Data to Bus B(2) High Z State H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance 640 is inverting from input to output. PS2012B 09/22/99 PI74FCT245T/640T/645T 25 Ohm Series PI74FCT2245T/2640T/2645T Octal BidirectionalTransceivers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 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 ..........................................................................................0.5W 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 = 5.0V ±5%) Parameters Description Test Conditions(1) Min. Typ(2) Max. Units VOH Output HIGH Voltage VCC = Min., VIN = VIH or VIL IOH = –15.0mA 2.4 3.0 V VOL Output LOW Current VCC = Min., VIN = VIH or VIL IOL = 64mA 0.3 0.55 V VOL Output LOW Current VCC = Min., VIN = VIH or VIL IOL = 12mA (25Ω Series) 0.3 0.50 V VIH Input HIGH Voltage Guaranteed Logic HIGH Level VIL Input LOW Voltage Guaranteed Logic LOW Level IIH Input HIGH Current (Except I/O pins) VCC = Max. IIL Input LOW Current IIH 2.0 V 0.8 V VIN = VCC 1 µA (Except I/O pins) VCC = Max. VIN = GND –1 µA Input HIGH Current (I/O pins Only) VCC = Max. VIN = VCC 1 µA IIL Input LOW Current (I/O pins Only) VCC = Max. VIN = GND –1 µA IOZH High Impedance VCC = MAX. VOUT = 2.7V 1 µA IOZL Output Current VOUT = 0.5V –1 µA VIK Clamp Diode Voltage VCC = Min., IIN = –18 mA –0.7 –1.2 V IOFF Power Down Disable VCC = GND, VOUT = 4.5V — — 100 µA IOS Short Circuit Current VCC = Max.(3), VOUT = GND –60 –120 mA VH Input Hysteresis 200 mV Capacitance (TA = 25°C, f = 1 MHz) Parameters(4) Description Test Conditions Typ. Max. Units CIN Input Capacitance VIN = 0V 6 10 pF C OUT Output Capacitance VOUT = 0V 8 12 pF 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 = 5.0V, +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 determined by device characterization but is not production tested. 2 PS2012B 09/22/99 PI74FCT245T/640T/645T 25 Ohm Series PI74FCT2245T/2640T/2645T Octal BidirectionalTransceivers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Test Conditions(1) Parameters Description Min. Typ(2) Max. Units ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 0.1 500 µA ∆ICC Supply Current per Input @ TTL HIGH VCC = Max., VIN = 3.4V(3) 0.5 2.0 mA ICCD Supply Current per Input per MHz(4) VCC = Max., Outputs Open OE = GND T/R = GND or VCC One Input Toggling 50% Duty Cycle VIN = VCC VIN = GND 0.15 0.25 mA/ MHz IC Total Power Supply Current(6) VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle T/R = OE = GND One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle T/R = OE = GND Eight Bits Toggling VIN = VCC VIN = GND 1.5 3.5(5) mA VIN = 3.4V VIN = GND 1.8 4.5(5) VIN = VCC VIN = GND 3.0 6.0(5) VIN = 3.4V VIN = GND 5.0 14.0(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 = 5.0V, +25°C ambient. 3. Per TTL driven input (VIN = 3.4V); 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 + DICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current ∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) 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) fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz. 3 PS2012B 09/22/99 PI74FCT245T/640T/645T 25 Ohm Series PI74FCT2245T/2640T/2645T Octal BidirectionalTransceivers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI74FCT245T/2245T Switching Characteristics over Operating Range Parameters Description t PLH t PHL t PZH t PZL t PHZ t PLZ t PZH t PZL t PHZ t PLZ Propagation Delay A to B, B to A Output Enable Time OE to A or B Output Disable Time OE to A or B(3) Output Enable Time T/R to A or B Output Disable Time(3) T/R to A or B(3) Conditions(1) CL = 50 pF RL = 500 Ohm 245T/2245T Com. Min. Max. 245AT/2245AT 245CT/2245CT Com. Com. Min. Max. Min. Max. 245DT Com. Min Max. Unit 1.5 7.0 1.5 4.6 1.5 4.1 1.5 3.8 ns 1.5 9.0 1.5 6.2 1.5 5.8 1.5 5.0 ns 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 ns 1.5 9.0 1.5 6.2 1.5 5.8 1.5 5.0 ns 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 ns PI74FCT640T/2640T Switching Characteristics over Operating Range Parameters Description t PLH t PHL t PZH t PZL t PHZ t PLZ t PZH t PZL t PHZ t PLZ Propagation Delay A to B, B to A Output Enable Time OE to A or B Output Disable Time OE to A or B(3) Output Enable Time T/R to A or B Output Disable Time(3) T/R to A or B(3) Conditions(1) CL = 50 pF RL = 500 Ohm 640T/2640T Com. Min. Max. 640AT/2640AT 640CT/2640CT Com. Com. Min. Max. Min. Max. 640DT Com. Min. Max. Unit 2.0 7.0 1.5 5.0 1.5 4.4 1.5 3.7 ns 2.0 13.0 1.5 6.2 1.5 5.8 1.5 5.0 ns 2.0 10.0 1.5 5.0 1.5 4.8 1.5 4.3 ns 2.0 13.0 1.5 6.2 1.5 5.8 1.5 5.0 ns 2.0 10.0 1.5 5.0 1.5 4.8 1.5 4.3 ns PI74FCT645T/2645T Switching Characteristics over Operating Range Parameters Description t PLH t PHL t PZH t PZL t PHZ t PLZ t PZH t PZL t PHZ t PLZ Propagation Delay A to B, B to A Output Enable Time OE to A or B Output Disable Time OE to A or B(3) Output Enable Time T/R to A or B Output Disable Time(3) T/R to A or B(3) Conditions(1) CL = 50 pF RL = 500 Ohm 645T/2645T Com. Min. Max. 645AT/2645AT 645CT/2645CT Com. Com. Min. Max. Min. Max. 645DT Com. Min. Max. Unit 1.5 9.5 1.5 4.6 1.5 4.1 1.5 3.8 ns 1.5 11.0 1.5 6.2 1.5 5.8 1.5 5.0 ns 1.5 12.0 1.5 5.0 1.5 4.8 1.5 4.3 ns 1.5 11.0 1.5 6.2 1.5 5.8 1.5 5.0 ns 1.5 12.0 1.5 5.0 1.5 4.8 1.5 4.3 ns Notes: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not production tested. Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 4 PS2012B 09/22/99