PI74LPT241 3.3V 8-BIT BUFFER/LINE DRIVER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI74LPT241 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Fast CMOS 3.3V 8-Bit Buffer/Line Driver Product Features Product Description • Compatible with LCX™ and LVT™ families of products • Supports 5V tolerant mixed signal mode operation – Input can be 3V or 5V – Output can be 3V or connected to 5V bus • Advanced low power CMOS operation • Excellent output drive capability: Balanced drives (24 mA sink and source) • 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 PI74LPT series of logic circuits are produced in the Company’s advanced 0.6 micron CMOS technology, achieving industry leading speed grades. Logic Block Diagram OEA DA0 OEB OB0 DA1 OA0 OB1 DA2 OB0 DB0 OB2 DA3 DA1 The PI74LPT241 can be driven from either 3.3V or 5.0V devices allowing this device to be used as a translator in a mixed 3.3/5.0V system. Product Pin Configuration OEA DA0 The PI74LPT241 is an 8-bit buffer/line driver designed for driving high capacitive 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. OA1 OB3 GND OB1 DB1 DA2 OA2 OB2 DB2 DA3 OA3 OB3 DB3 1 20 2 19 3 18 4 20-PIN 17 L20 16 5 Q20 6 6 15 R20 14 7 7 14 S20 8 13 8 13 9 12 9 12 10 11 10 11 VCC Product Pin Description Pin Name OEA, OEB OEB OA0 DB0 OA1 DB1 OA2 Dxx Oxx GND VCC Description 3-State Output Enable Inputs Inputs Outputs Ground Power DB2 OA3 DB3 Truth Table(1) OEA L L H Inputs OEB H H L DXX L H X Outputs OXX L H Z Note: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance 1 PS2057A 01/14/97 PI74LPT241 3.3V 8-BIT BUFFER/LINE DRIVER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................. –55°C to +125°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 .............................................................................. 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. 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 IOS IOFF VH Short Circuit Current(4) Power Down Disable Input Hysteresis 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 — — V V V mA µA 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 = 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. 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 PS2057A 01/14/97 PI74LPT241 3.3V 8-BIT BUFFER/LINE DRIVER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Parameters Description ICC Test Conditions(1) Min. Typ(2) Max. Units Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 0.1 10 µA Quiescent Power Supply Current TTL Inputs HIGH VCC = Max. VIN = VCC – 0.6V(3) 2.0 30 µA ICCD Dynamic Power Supply(4) VCC = Max., Outputs Open OEX = GND One Bit Toggling 50% Duty Cycle VIN = VCC VIN = GND 50 75 µA/ MHz IC Total Power Supply Current(6) VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle OEX = GND One Bit Toggling VIN = VCC – 0.6V VIN = GND 0.6 2.3 mA VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle OEX = GND 8 Bits Toggling VIN = VCC – 0.6V VIN = GND 2.1 4.7(5) ∆ICC 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. 3 PS2057A 01/14/97 PI74LPT241 3.3V 8-BIT BUFFER/LINE DRIVER 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Switching Characteristics over Operating Range(1) LPT241 LPT241A Com. Parameters Description Conditions tPLH tPHL Propagation Delay DXX to OXX CL = 50 pF RL = 500Ω tPZH tPZL (2) (3) Min. LPT241C Com. Max. Min. (3) Com. Max. Min. (3) Max. Units 1.5 6.5 1.5 4.8 1.5 4.1 ns Output Enable Time OEA/OEB to Oxx 1.5 8.0 1.5 6.2 1.5 5.8 ns tPHZ tPLZ Output Disable Time(4) OEA/OEB to Oxx 1.5 7.0 1.5 5.6 1.5 5.2 ns tSK(o) Output Skew(5) 0.5 ns 0.5 0.5 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 waveforms. 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 PS2057A 01/14/97