PI74FCT245T Ω Series) PI74FCT2245T (25Ω 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Fast CMOS Octal Bidirectional Transceivers Features Description • Pin compatible with bipolar FAST™ Series at a higher speed and lower power consumption • 25-ohm series resistor on all outputs (FCT2245Tonly) • 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 • Packaging (Pb-free & Green Available): – 20-pin 173-mil wide plastic TSSOP (L) – 20-pin 300-mil wide plastic SOIC (S) – 20-pin 209-mil wide plastic SSOP (H) – 20-pin 150-mil wide plastic QSOP (Q) Pericom Semiconductor’s PI74FCT245T and PI74FCT2245T 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 Hi-Z condition. PI74FCT2245T has 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. Pin Configuration T/R A0 A1 A2 A3 A4 A5 A6 A7 GND Block Diagram T/R OE A0 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 Vcc OE B0 B1 B2 B3 B4 B5 B6 B7 B0 Pin Description A1 Pin Name OE T/R A0-A7 B0-B7 GND VCC B1 A2 B2 A3 B3 A4 B4 Truth Table(1) A5 Inputs OE T/R L L L H H X B5 A6 B6 A7 1. B7 06-0207 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 1 Outputs Bus B Data to Bus A Bus A Data to Bus B High Z State H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance PS2012E 08/08/06 PI74FCT245T PI74FCT2245T(25 Ohm Series ) 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 –1.2 V IOFF Power Down Disable VCC = GND, VOUT = 4.5V 100 μA IOS Short Circuit Current VCC = Max.(3), VOUT = GND VH Input Hysteresis –0.7 –60 –120 mA 200 mV 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. Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) Description Test Conditions Typ. Max. Units CIN Input Capacitance VIN = 0V 6 10 pF COUT Output Capacitance VOUT = 0V 8 12 pF Notes: 1. These Parameters are determined by device characterization but are not production tested. 06-0207 2 PS2012E 08/08/06 PI74FCT245T PI74FCT2245T(25 Ohm Series ) 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 ΔICC 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 ΔICC = 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. 06-0207 3 PS2012E 08/08/06 PI74FCT245T PI74FCT2245T(25 Ohm Series ) Octal BidirectionalTransceivers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Switching Characteristics over Operating Range Conditions(1) Parameters Description t PLH t PHL t PZH t PZL t PHZ t PLZ t PZH t PZL t PHZ t PLZ 245T/2245T Com. Min. Max. Propagation Delay A to B, B to A Output Enable Time(2) OE to A or B Output Disable Time(2) OE to A or B Output Enable Time(2) T/R to A or B Output Disable Time(2) T/R to A or B CL = 50 pF RL = 500-ohm 245AT/2245AT 245CT/2245CT Com. Com. Min. Max. Min. Max. 245DT Com. Min Max. Unit 1.5(1) 7.0 1.5(1) 4.6 1.5(1) 4.1 1.5(1) 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 Notes: 1. Minimum limits are guaranteed but not tested on Propagation Delays. 2. This parameter is guaranteed but not production tested. Packaging Mechanical: 20-pin SOIC (S) 20 .2914 .2992 7.40 7.60 .010 .029 0.254 x 45˚ 0.737 1 .496 12.60 .511 12.99 .020 0.508 REF .030 0.762 06-0207 .013 .020 0.33 0.51 0.23 0.32 0.41 .016 1.27 .050 .0926 .1043 2.35 2.65 .394 .419 10.00 10.65 SEATING PLANE .050 BSC 1.27 .0091 .0125 0-8˚ .0040 .0118 0.10 0.30 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS 4 PS2012E 08/08/06 PI74FCT245T PI74FCT2245T(25 Ohm Series ) Octal BidirectionalTransceivers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Packaging Mechanical: 20-Pin TSSOP (L) 20 .169 .177 4.3 4.5 1 .252 .260 6.4 6.6 .004 0.09 .008 0.20 .047 1.20 Max .007 .012 0.19 0.30 .0256 BSC 0.65 0.45 0.75 SEATING PLANE .018 .030 .238 .269 6.1 6.7 .002 0.05 .006 0.15 Packaging Mechanical: 20-pin QSOP (Q) 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 .058 REF 1.47 .041 1.04 REF .015 x 45˚ 0.38 .053 1.35 .069 1.75 Detail A .007 .010 SEATING PLANE .016 .050 .025 BSC 0.635 0˚-6˚ .016 .035 0.41 0.89 .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 06-0207 5 PS2012E 08/08/06 PI74FCT245T PI74FCT2245T(25 Ohm Series ) Octal BidirectionalTransceivers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Packaging Mechanical: 20-Pin SSOP (H) 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 .0256 BSC 0.65 .0098 Max. 0.25 0.09 0.25 .291 .322 7.40 8.20 .002 Min 0.050 PI74FCT245T Ordering Information Ordering Code PI74FCT245TQ PI74FCT245TQE PI74FCT245TS PI74FCT245TSE PI74FCT245ATLE PI74FCT245ATS PI74FCT245ATSE PI74FCT245ATQ PI74FCT245ATQE PI74FCT245CTH PI74FCT245CTHE PI74FCT245CTS PI74FCT245CTSE PI74FCT245CTQ PI74FCT245CTQE PI74FCT245DTQ PI74FCT245DTQE 06-0207 Package Code Q Q S S L S S Q Q H H S S Q Q Q Q Speed Grade Blank Blank Blank Blank A A A A A C C C C C C D D 6 Package Type 20-pin QSOP Pb-free & Green, 20-pin QSOP 20-pin SOIC Pb-free & Green, 20-pin SOIC Pb-free & Green, 20-pin TSSOP 20-pin SOIC Pb-free & Green, 20-pin SOIC 20-pin QSOP Pb-free & Green, 20-pin QSOP 20-pin SSOP Pb-free & Green, 20-pin SSOP 20-pin SOIC Pb-free & Green, 20-pin SOIC 20-pin QSOP Pb-free & Green, 20-pin QSOP 20-pin QSOP Pb-free & Green, 20-pin QSOP PS2012E 08/08/06 PI74FCT245T PI74FCT2245T(25 Ohm Series ) Octal BidirectionalTransceivers 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI74FCT2245T Ordering Information Ordering Code PI74FCT2245TQ PI74FCT2245TQE PI74FCT2245TS PI74FCT2245TSE PI74FCT2245ATS PI74FCT2245ATSE PI74FCT2245ATQ PI74FCT2245ATQE PI74FCT2245CTL PI74FCT2245CTLE PI74FCT2245CTQ PI74FCT2245CTQE PI74FCT2245DTSE Package Code Q Q S S S S Q Q L L Q Q S Speed Grade Blank Blank Blank Blank A A A A C C C C D Package Type 20-pin QSOP Pb-free & Green, 20-pin QSOP 20-pin SOIC Pb-free & Green, 20-pin SOIC 20-pin SOIC Pb-free & Green, 20-pin SOIC 20-pin QSOP Pb-free & Green, 20-pin QSOP 20-pin TSSOP Pb-free & Green, 20-pin TSSOP 20-pin QSOP Pb-free & Green, 20-pin QSOP Pb-free & Green, 20-pin SOIC Notes: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • E = Pb-free & Green • Adding an X suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 06-0207 7 PS2012E 08/08/06