PI74FCT3245 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Fast CMOS 3.3V 8-Bit Bidirectional Transceiver Product Features Product Description • Advanced Low Power CMOS Operation • Compatible with LVC class of products • Compatible with industry standard octal pinouts • Excellent output drive capability: Balanced Drives (24 mA sink and source) • Can serve as a 5V to 3V translator • Inputs can be driven by 3.3V or 5V devices • Low ground bounce outputs • 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 150 mil wide plastic QSOP(Q) -20-pin 150 mil wide plastic TQSOP(R) -20-pin 300 mil wide plastic SOIC(S) Pericom Semiconductor’s PI74FCT3 series of logic circuits are produced in the Company’s advanced 0.6 micron CMOS technology, achieving industry leading speed grades. The PI74FCT3245 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 PI74FCT3245 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. Product Pin Configuration Logic Block Diagram T/ OE A0 B0 A1 B1 A2 T/R A0 A1 A2 A3 A4 A5 A6 A7 GND 20 1 19 2 20-PIN 18 3 L20 4 Q20 17 5 R20 16 6 S20 15 14 7 13 8 12 9 11 10 VCC OE B0 B1 B2 B3 B4 B5 B6 B7 Product Pin Description Pin Name OE T/R A7-A0 B7-B0 GND VCC 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 B2 A3 B3 Truth Table A4 Inputs(1) B4 1A5 B5 A6 B6 A7 OE L L H T/R L H X Outputs(1) Bus B Data to Bus A Bus A Data to Bus B High StateZ Note: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance B7 1 PS7068C 8/22/97 PI74FCT3245 3.3V 8-BIT BIDIRECTIONAL TRANSCEIVER 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 ......................................................................................... 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. DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V) Parameters IOZH IOZL VIK IODH IODL VOH Input HIGH Voltage (Input pins) Input HIGH Voltage (I/O pins) Input LOW Voltage (Input and I/O pins) Input HIGH Current (Input pins) Input HIGH Current (I/O pins) Input LOW Current (Input pins) Input LOW Current (I/O pins) High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Output HIGH Current Output LOW Current Output HIGH Voltage VOL Output LOW Voltage VIH VIL IIH IIL Test Conditions(1) Description Guaranteed Logic HIGH Level Guaranteed Logic LOW Level Min. Typ.(2) Max. Units 2.2 2.0 –0.5 — — — 5.5 5.5 0.8 V V V — — — — — — –0.7 –60 90 — 3.0 3.0 — — 0.2 0.3 –85 — 150 ±1 ±1 ±1 ±1 ±1 ±1 –1.2 –110 200 — — — — 0.2 0.4 0.5 –240 ±100 — µA µA µA µA µA µA V mA mA V V V VCC = Max. VIN = 5.5V — VCC = Max. VIN = VCC — VCC = Max. VIN = GND — VCC = Max. VIN = GND — VCC = Max. VOUT = 5.5V — VCC = Max. VOUT = GND — VCC = Min., IIN = –18 mA — VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) –36 VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) 50 VCC = Min. IOH = –0.1 mA Vcc-0.2 VIN = VIH or VIL IOH = –3 mA 2.4 VCC = 3.0V, IOH = –8 mA 2.4(5) VIN = VIH or VIL IOH = –24 mA 2.0 VCC = Min. IOL = 0.1 mA — VIN = VIH or VIL IOL = 16 mA — IOL = 24 mA — VCC = Max.(3), VOUT = GND –60 VCC = 0V, VIN or VOUT ≤ 4.5V — — IOS Short Circuit Current(4) IOFF Power Down Disable VH Input Hysteresis 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, +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 guaranteed but not tested. 5. VOH = VCC – 0.6V at rated current. V V V mA µA mV Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) CIN COUT Description Test Conditions Input Capacitance Output Capacitance VIN = 0V VOUT = 0V Typ. Max. Units 4.5 5.5 6 8 pF pF Note: 1. This parameter is determined by device characterization but is not production tested. 2 PS7068C 8/22/97 PI74FCT3245 3.3V 8-BIT BIDIRECTIONAL TRANSCEIVER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Parameters Description ICC Quiescent Power Supply Current Test Conditions(1) Min. Units VIN = GND or VCC 0.1 10 µA (3) 2.0 30 µA 95 100 µA/ MHz Quiescent Power Supply Current TTL Inputs HIGH VCC = Max. VIN = VCC – 0.6V ICCD Dynamic Power Supply(4) VCC = Max., Outputs Open OE = GND One Bit Toggling 50% Duty Cycle VIN = VCC VIN = GND VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle OE = GND One Bit Toggling VIN = VCC – 0.6V VIN = GND VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle OE = GND 8 Bits Toggling VIN = VCC – 0.6V VIN = GND Total Power Supply Current(6) Max. VCC = Max. ∆ICC IC Typ.(2) 0.97 2.3 mA 1 2 3 4 5 1.9 4.7(5) 6 7 Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at Vcc = 3.3V, +25°C ambient. 3. Per TTL driven input; 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 + ∆ICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ∆ICC = Power Supply Current for a TTL High Input 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) NCP = Number of Clock Inputs at fCP fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz. 8 9 10 11 12 13 14 15 3 PS7068C 8/22/97 PI74FCT3245 3.3V 8-BIT BIDIRECTIONAL TRANSCEIVER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Switching Characteristics over Operating Range(1) FCT3245 Com. Description Conditions(2) tPLH tPHL Propagation Delay A to B, B to A CL = 50 pF RL = 500 Ω tPZH tPZL Output Enable Time OE to A or B 1.5 5.8 ns tPHZ tPLZ Output Disable Time(4) OE to A or B 1.5 4.8 ns tPZH tPZL Output Enable Time T/R to A or B 1.5 5.8 ns tPHZ tPLZ Output Disable Time(4) T/R to A or B 1.5 4.8 ns tSK(o) Output Skew(5) 0.5 ns Parameters Min.(3) Max. Units 1.5 4.1 ns Notes: 1. Propagation Delays and Enable/Disable times are with VCC = 3.3V ± 0.3V, normal range. For VCC = 2.7V, extended range, all Propagation Delays and Enable/Disable times should be degraded by 20%. 2. See test circuit and wave forms. 3. Minimum limits are guaranteed but not tested on Propagation Delays. 4. This parameter is guaranteed but not production tested. 5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design. Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 4 PS7068C 8/22/97