PI74LPT244AS

PI74LPT244 Fast CMOS 3.3V 8-Bit Buffer/Line Driver Features 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 (24mA sink and source) • Low ground bounce outputs Pericom Semiconductor’s PI74LPT244 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. The PI74LPT244 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. • Hysteresis on all inputs • Industrial operating temperature range: –40°C to +85°C • Packages (Pb-free & Green available): – 20-pin 173-mil wide plastic TSSOP (L) – 20-pin 150-mil wide plastic QSOP (Q) – 20-pin 300-mil wide plastic SOIC (S) – 20-pin 209-mil wide plastic SSOP (H) Block Diagram Pin Configuration OEA DA0 OB0 DA1 OB1 DA2 OB2 DA3 OB3 GND 06-0181 1 1 20 2 19 3 18 4 20-PIN 17 L20 16 5 Q20 6 15 S20 7 14 8 13 9 12 10 11 VCC OEB OA0 DB0 OA1 DB1 OA2 DB2 OA3 DB3 PS2058F 06/05/06 PI74LPT244 3.3V 8-Bit Buffer /Line Driver 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 Truth Table(1) Pin Description Pin Name Description OEA, OEB 3-State Output Enable Inputs (Active LOW) Dxx 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. Inputs Outputs OEA OEB DXX OXX Inputs L L L L Oxx Outputs L L H H GND Ground H H X Z VCC Notes: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance Power 06-0181 2 PS2058F 06/05/06 PI74LPT244 3.3V 8-Bit Buffer /Line Driver DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V) Parameters IOZL VIK Description 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 IODH Output HIGH Current IODL Output LOW Current VIH VIL IIH IIL IOZH VOH Output HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level Output LOW Voltage IOS IOFF VH Short Circuit Current Power Down Disable Input Hysteresis Typ(2) Max. 2.2 5.5 2.0 5.5 –0.5 0.8 VCC = Max. VIN = 5.5V ±1 VCC = Max. VIN = VCC ±1 VCC = Max. VIN = GND ±1 VCC = Max. VIN = GND ±1 VCC = Max. VOUT = 5.5V ±1 VCC = Max. VOUT = GND VCC = Min., IIN = –18 mA VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V VCC = Min. VIN = VIH or VIL IOH = –0.1 mA IOH = –3 mA IOH = –8 mA IOH = –24 mA IOL = 0.1 mA VCC = Min. IOL = 16 mA VIN = VIH or VIL IOL = 24 mA VCC = Max., VOUT = GND VCC = 0V, VIN or VOUT ≤ 4.5V VCC = 3.0V, VIN = VIH or VIL VOL Min. –36 –0.7 ±1 –1.2 –60 –110 Units V µA V mA 50 VCC0.2 2.4 2.4(5) 2.0 –60 90 200 3.0 3.0 0.2 0.3 –85 V 0.2 0.4 0.5 –240 ±100 150 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. 06-0181 3 PS2058F 06/05/06 PI74LPT244 3.3V 8-Bit Buffer /Line Driver Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) CIN COUT Description Test Conditions Input Capacitance Output Capacitance Typ VIN = 0V VOUT = 0V Max. 4.5 5.5 Units 6 8 pF Notes: 1. This parameter is determined by device characterization but is not production tested. Power Supply Characteristics Parameters Description ICC Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply(4) ΔICC ICCD IC Total Power Supply Current(6) Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., Outputs Open OEX = GND One Bit Toggling 50% Duty Cycle VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle OEX = GND One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle OEX = GND 8 Bits Toggling Min. VIN = GND or VCC VIN = VCC – 0.6V(3) Typ(2) 0.1 Max. Units 10 µA 500 µA VIN = VCC VIN = GND 50 75 µA/ MHz VIN = VCC – 0.6V VIN = GND 0.6 2.3 mA VIN = VCC – 0.6V VIN = GND 2.1 4.7(5) mA 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 + ΔICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ΔICC = 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. 06-0181 4 PS2058F 06/05/06 PI74LPT244 3.3V 8-Bit Buffer /Line Driver Switching Characteristics over Operating Range(1) LPT244 Parameters Description tPLH tPHL Propagation Delay DXX to OXX tPZH tPZL Output Enable Time OEx to Oxx Conditions Output Disable Time(3) OEx to Oxx tPHZ tPLZ CL = 50pF RL = 500Ω Com. Min.(2) LPT244C Com. Max Min.(2) 1.5 6.5 1.5 1.5 Output Skew(4) tSK(O) LPT244A Com. Units Max. Min.(2) Max. 1.5 4.8 1.5 4.1 8.0 1.5 6.2 1.5 5.8 7.0 1.5 5.6 1.5 5.2 0.5 0.5 ns 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. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not production tested. 4. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design. Packaging Mechanical: 20-pin QSOP (Q) 20 .008 0.20 MIN. .150 .157 3.81 3.99 .008 .013 0.20 0.33 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 .008 0.203 .012 0.305 .004 0.101 .010 0.254 0.178 0.254 0.41 1.27 .228 .244 5.79 6.19 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS 06-0181 5 PS2058F 06/05/06 PI74LPT244 3.3V 8-Bit Buffer /Line Driver Packaging Mechanical: 20-pin TSSOP (L) �� ���� ���� � ���� ������ ��� ��� ����� ��� ���� ��� ��� ���� ���� ���� ����� ���� ���� ��� ���� ���� ������� ����� ���� ���� ��� ��� ���� ���� ���� ���� ���� ���� ���� ���� ���� ���� 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 06-0181 .013 .020 0.33 0.51 0.23 0.32 0.41 .016 1.27 .050 .0926 .1043 2.35 2.65 SEATING PLANE .050 BSC 1.27 .0091 .0125 0-8˚ .0040 .0118 .394 .419 10.00 10.65 0.10 0.30 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS 6 PS2058F 06/05/06 PI74LPT244 3.3V 8-Bit Buffer /Line Driver Packaging Mechanical: 20-pin SSOP (H) �� ���� ���� ���� ���� � ���� ���� ���� ������� ���� ���� ���� ���� ���� ���� ���� ���� ��� ������� ������ ����� ���� ���� 06-0181 ����� ���� ���� ���� ���� ���� ���� ���� ���� ���� ��� ����� 7 PS2058F 06/05/06 PI74LPT244 3.3V 8-Bit Buffer /Line Driver Ordering Information Ordering Code PI74LPT244Q Package Code Q Speed Grade Blank Description PI74LPT244QE Q Blank Pb-free & Green 20-pin 150-mil wide plastic QSOP PI74LPT244L L Blank 20-pin 173-mil wide plastic TSSOP PI74LPT244LE L Blank Pb-free & Green, 20-pin 173-mil wide plastic TSSOP PI74LPT244AQ Q A 20-pin 150-mil wide plastic QSOP PI74LPT244AQE Q A Pb-free & Green 20-pin 150-mil wide plastic QSOP PI74LPT244AS S A 20-pin 300-mil wide plastic SOIC PI74LPT244ASE S A Pb-free & Green, 20-pin 300-mil wide plastic SOIC PI74LPT244CQ Q C 20-pin 150-mil wide plastic QSOP PI74LPT244CS S C 20-pin 300-mil wide plastic SOIC PI74LPT244CSE S C Pb-free & Green, 20-pin 300-mil wide plastic SOIC PI74LPT244CQE Q C Pb-free & Green, 20-pin 150-mil wide plastic QSOP PI74LPT244AH H A 20-pin 209-mil wide plastic SSOP PI74LPT244AHE H A Pb-free & Green, 20-pin 209-mil wide plastic SSOP 20-pin 150-mil wide plastic QSOP Notes: • Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ • E = Pb-free and Green • Adding an X Suffix = Tape/Reel Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 06-0181 8 PS2058F 06/05/06