PI74LPT244. Fast CMOS 3.3V 8-Bit Buffer/Line Driver. Features. Description. Block Diagram. Pin Configuration
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1 Fast CMOS 3.3V 8-Bit Buffer/Line Driver Features 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 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) Description 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. Block Diagram Pin Configuration OEA DA0 OB0 DA1 OB1 DA2 OB2 DA3 OB3 GND PIN L20 Q20 S VCC OEB OA0 DB0 OA1 DB1 OA2 DB2 OA3 DB3 1
2 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature C to +125 C Ambient Temperature with Power Applied C to +85 C Supply Voltage to Ground Potential (Inputs & Vcc Only) V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) V to +7.0V DC Input Voltage V to +7.0V DC Output Current ma Power Dissipation...1.0W Note: Stresses greater than those listed under MAXIMUM RAT- INGS 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. Pin Description Pin Name Description OEA, OEB 3-State Output Enable Inputs (Active LOW) Dxx Inputs Oxx Outputs GND Ground V CC Power Truth Table (1) Inputs Outputs OEA OEB DXX OXX L L L L L L H H H H X Z 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance 2
3 DC Electrical Characteristics (Over the Operating Range, TA = 40 C to +85 C, V CC = 2.7V to 3.6V) Parameters Description Test Conditions (1) Min. Typ (2) Max. Units Input HIGH Voltage (Input V IH pins) Guaranteed Logic HIGH Level Input HIGH Voltage (I/O pins) V V IL Input LOW Voltage (Input and I/O pins) Guaranteed Logic LOW Level Input HIGH Current I IH (Input pins) V CC = Max. V IN = 5.5V ±1 Input HIGH Current (I/O pins) V CC = Max. V IN = V CC ±1 Input LOW Current V I IL (Input pins) CC = Max. V IN = GND ±1 µa Input LOW Current (I/O pins) V CC = Max. V IN = GND ±1 I OZH High Impedance Output Current V CC = Max. V OUT = 5.5V ±1 I OZL (3-State Output pins) V CC = Max. V OUT = GND ±1 V IK Clamp Diode Voltage V CC = Min., I IN = 18 ma V I ODH Output HIGH Current V CC = 3.3V, V IN = V IH or V IL, V O = 1.5V I ODL Output LOW Current V CC = 3.3V, V IN = V IH or V IL, V O = 1.5V ma V OH V OL Output HIGH Voltage Output LOW Voltage V CC = Min. V IN = V IH or V IL I OH = 0.1 ma V CC I OH = 3 ma V CC = 3.0V, I OH = 8 ma 2.4 (5) 3.0 V IN = V IH or V IL I OH = 24 ma 2.0 V CC = Min. V IN = V IH or V IL I OL = 0.1 ma 0.2 I OL = 16 ma I OL = 24 ma I OS Short Circuit Current V CC = Max., V OUT = GND ma I OFF Power Down Disable V CC = 0V, VIN or V OUT 4.5V ±100 µa V H Input Hysteresis 150 mv 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at V CC = 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. V OH = V CC 0.6V at rated current. V 3
4 Capacitance (TA = 25 C, f = 1 MHz) Parameters (1) Description Test Conditions Typ Max. Units C IN Input Capacitance V IN = 0V pf C OUT Output Capacitance V OUT = 0V This parameter is determined by device characterization but is not production tested. Power Supply Characteristics Parameters Description Test Conditions (1) Min. Typ (2) Max. Units I CC ΔI CC Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH V CC = Max. V CC = Max. I CCD Dynamic Power Supply (4) V CC = Max., Outputs Open OEX = GND One Bit Toggling 50% Duty Cycle I C Total Power Supply Current (6) V CC = Max., Outputs Open fi = 10 MHZ 50% Duty Cycle OEX = GND One Bit Toggling V CC = Max., Outputs Open fi = 2.5 MHZ 50% Duty Cycle OEX = GND 8 Bits Toggling V IN = GND µa or V CC V IN = V CC 500 µa 0.6V (3) V IN = V CC V IN = GND V IN = V CC 0.6V V IN = GND V IN = V CC 0.6V V IN = GND 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 µa/ MHz ma (5) ma 4
5 Switching Characteristics over Operating Range (1) Parameters Description Conditions t PLH t PHL t PZH t PZL Propagation Delay DXX to OXX Output Enable Time OEx to Oxx t PHZ Output Disable Time (3) t PLZ OEx to Oxx C L = 50pF R L = 500Ω LPT244 LPT244A LPT244C Com. Com. Com. Min. (2) Max Min. (2) Max. Min. (2) Max t SK(O) Output Skew (4) 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. Units ns Packaging Mechanical: 20-pin QSOP (Q) Guage Plane MIN Detail A REF BSC REF SEATING PLANE.015 x Detail A X.XX X.XX DENOTES DIMENSIONS IN MILLIMETERS 5
6 Packaging Mechanical: 20-pin TSSOP (L) Packaging Mechanical: 20-pin SOIC (S) x REF SEATING PLANE BSC X.XX X.XX DENOTES CONTROLLING DIMENSIONS IN MILLIMETERS 6
7 Packaging Mechanical: 20-pin SSOP (H) 7
8 Ordering Information Ordering Code Package Code Speed Grade Description PI74LPT244Q Q Blank 20-pin 150-mil wide plastic QSOP 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 Thermal characteristics can be found on the company web site at E = Pb-free and Green Adding an X Suffix = Tape/Reel Pericom Semiconductor Corporation
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PO3B10A. Truth Table. High Bandwidth Potato Chip. 2-Channel, 2:1 Mux/DeMux Switch w/ Single Enable GND V DD GND SEL
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IDT74FCT2245T/CT FST CMOS OCTL BIDIRECTIONL TRNSCEIVER FST CMOS OCTL BIDIRECTIONL TRNSCEIVER INDUSTRIL TEMPERTURE RNGE IDT74FCT2245T/CT FETURES: and C grades Low input and output leakage 1μ (max.) CMOS
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Features SAS, SATA2, XAUI Switch 2 Differential Channel, 2:1 Mux/DeMux Bandwidth of 2.0 GHz (3dB) Low Bit-to-Bit Skew :
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PO3B402A. High Bandwidth Potato Chip OE1 Y1+ Y1- GND SEL3 SEL1 D3- D3+ OE2 Y2+ Y2- Y3+ M3- M3+ OE3 SEL2 OE3 Y3+ Y3- SEL3 OE4 Y4+ Y4- SEL4
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PI6C4511. PLL Clock Multiplier. Features. Description. Block Diagram. PLL Clock Synthesis and Control Circuit. Output Buffer. Crystal Oscillator
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CBTS3253 Dual 1-of-4 FET multiplexer/demultiplexer with Schottky diode clamping
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Features. Description. Pin Configuration. Block Diagram. Truth Table (1) PI3CH480. TSSOP/QSOP Top View. UQFN3x3-16 Top View
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FST Bit Bus Switch
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CBTD3257 Quad 1-of-2 multiplexer/demultiplexer with level shifting
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FST3253 Dual 4:1 Multiplexer/Demultiplexer Bus Switch
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74ABT Bit Transparent D-Type Latch with 3-STATE Outputs
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74LVT LVTH16374 Low Voltage 16-Bit D-Type Flip-Flop with 3-STATE Outputs
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FST32X Bit Bus Switch
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FSTD Bit Bus Switch with Level Shifting
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74ABT Bit Registered Transceiver with 3-STATE Outputs
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74AC244 74ACT244 Octal Buffer/Line Driver with 3-STATE Outputs
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IDT74FCT2374AT/CT FAST CMOS OCTAL D REGISTER (3-STATE)
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Features Bidirectional buffer isolates capacitance and allows 400 pf on port B of the device Port A operating supply voltage range of 1.1 V to V CC(B) - 1.0V Port B operating supply voltage range of 2.5
UNISONIC TECHNOLOGIES CO., LTD
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.V, -Bit, -Port Nanoswitchw/Individual Enables Features ¼¼Near zero propagation delay ¼¼5 Ohm switches connect inputs to outputs ¼¼Fast Switching Speed - ns max. ¼¼Ultra Low Quiescent Power (0.µA Typical)
A product Line of Diodes Incorporated. Description EN S 1 IA 3 IA 2 IA 1 GND. Note: 1. N.C. = No internal connection.
Low Voltage, High Bandwidth, USB 2.0, 4:1 Mux/DeMux with Single Enable Features ÎÎNear-Zero propagation delay ÎÎ5Ω switches connect inputs to outputs ÎÎHigh signal passing bandwidth (-3dB BW is 815MHz)
CBTS3306 Dual bus switch with Schottky diode clamping
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