PO74G245B 1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs 04/19/09 74 Series GHz Logic FEATURES: DESCRIPTION: . Patented technology . Operating frequency up to 1GHz with 2pf load . Operating frequency up to 730MHz with 5pf load . Operating frequency up to 320MHz with 15pf load Potato Semiconductor’s PO74G245A is designed for world top performance using submicron CMOS technology to achieve 1GHz TTL /CMOS output frequency with less than 1.65ns propagation delay. This Octal bus buffer gate is designed for 1.2-V to 3.6-V VCC operation. . Operating frequency up to 75MHz with 50pf load . VCC Operates from 1.2V to 3.6V . Propagation delay < 1.65ns max with 15pf load . Low input capacitance: 5pf typical . Available in 20pin TSSOP package The PO74G245A features independent 8-bit Bidirectional Transceiver with 3 state outputs. Each output is disabled when the associated output- enable(OE) input is high. Pin Configuration Logic Block Diagram DIR DIR A1 A2 A3 A4 A5 A6 A7 A8 GND 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC OE B1 B2 B3 B4 B5 B6 B7 B8 Pin Description Pin Name OE A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 Truth Table De s cription Inputs Outputs OE 3- State Output Enable Inputs (Active LOW) OE DIR DIR Direction Control Input L L Bus B Data to Bus A AX Side A Inputs or 3- State Inputs L H Bus A Data to Bus B BX Side B Outputs or 3- State Outputs H X GND Ground VCC Power Z 1 Copyright © Potato Semiconductor Corporation PO74G245B 1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs 04/19/09 74 Series GHz Logic Maximum Ratings Description Max Unit Storage Temperature -65 to 150 °C Operation Temperature -40 to 85 °C Operation Voltage -0.5 to +4.6 V Input Voltage -0.5 to +Vcc V Output Voltage -0.5 to Vcc+0.5 V DC Electrical Characteristics VCC Supply Voltage High- level Input Voltage stresses greater than 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 specification is not implied. (Over the Operating Range, TA = –40°C +85°C) M in. M a x. O perating 1.4 3.6 Data retention only 1.2 VCC = 1.2V VIH Note: VCC VCC = 1.4V to 1.6V 0.65 x VCC VCC = 1.65V to 1.95V 0.65 x VCC VCC = 2.3V to 2.7V VCC = 3V to 3.6V 1.7 2 VCC = 1.2V VIL Low- level Input Voltage VI Input Voltage VO O utput Voltage GN D VCC = 1.4V to 1.6V 0.35 x VCC VCC = 1.65V to 1.95V 0.35 x VCC VCC = 2.3V to 2.7V 0.7 VCC = 3V to 3.6V 0.8 0 3.6 Active State 0 VCC 3- State 0 High- level output current –4 VCC = 1.65V to 1.95V –6 VCC = 2.3V to 2.7V – 12 VCC = 3V to 3.6V – 24 VCC = 1.4V to 1.6V IOL Low- level output current !t!v Input transition rise or fall rate TA O perating free- air temperature V 3.6 VCC = 1.4V to 1.6V IOH Units 4 VCC = 1.65V to 1.95V 6 VCC = 2.3V to 2.7V 12 VCC = 3V to 3.6V 24 VCC = 1.4V to 3.6V –40 mA 5 ns/V 85 °C 2 Copyright © Potato Semiconductor Corporation PO74G245B 1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs 04/19/09 74 Series GHz Logic DC Electrical Characteristics Te s t Conditions (1) Parame te rs VO H VO L CI VCC M in. Typ. M ax. IO HS = –4mA VIH = 0.91V 1. 4 V 1.05 IO HS = –6mA VIH = 1.07V 1.65V 1. 2 IO HS = –12mA VIH = 1.7V 2.3V 1. 7 5 IO HS = –24mA VIH = 2V 3V 2.0 IO LS = 4mA VIL = 0.49V 1.4V 0.4 IO LS = 6mA VIL = 0.57V 1. 6 5 V 0.45 IO LS = 12mA VIL = 0.7V 2 . 3V 0.55 IO LS = 24mA VIL = 0.8V 3V 0.8 II VI = VC C or GND 3.6V ± 2.5 IO Z VO = VC C or GND 3.6V ± 10 IC C VI = VC C or GND 3.6V ±350 Control Inputs VI = VC C or GND Data Inputs CO (Over the Operating Range, TA = –40°C +85°C) Outputs VO = VC C or GND IO = 0 Units V µA 3.5 5 pF 5 Notes: 1. Typical values are measured at TA = 25°C. 3 Copyright © Potato Semiconductor Corporation PO74G245B 1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs 04/19/09 74 Series GHz Logic Switching Characteristics From (Input) To (Output) VCC = 1.2V VCC = 1.5V ± 0.1V VCC = 1.8V ± 0.15V VCC = 2.5V ± 0.2V VCC = 3.3V ± 0.3V Typ. Max Max Max Max tpd A or B B or A 3.5 3.5 2.9 1.85 1.65 ten OE B or A 8.4 9.6 7.0 4.3 3.5 tdis OE B or A 8.4 9.6 7.0 4.3 3.5 fmax CL=2pf A or B B or A 270 300 685 1000 fmax CL=5pf A or B B or A 150 150 390 730 fmax CL=15pf A or B B or A 100 130 220 320 fmax CL=50pf A or B B or A 45 50 70 75 Parame te rs Operating Characteristics, Parame te rs Cpd Power Dissipation Capacitance Units ns Mhz TA= 25°C Te s t Conditions CL = 0pF, f = 10 MHz VCC = 1.2V VCC = 1.8V ± 0.15V VCC = 2.5V ± 0.2V VCC = 3.3V ± 0.3V Typical Typical Typical Typical 18.5 20 22 26 Units pF 4 Copyright © 2005-2006, Potato Semiconductor Corporation PO74G245B 1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs 04/19/09 74 Series GHz Logic Test Waveforms Test Circuit 500 Ω 50Ω 50pF to 2pF 50 Ω 500 Ω 5 Copyright © Potato Semiconductor Corporation PO74G245B 1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs 04/19/09 74 Series GHz Logic Packaging Mechanical Drawing: 20 pin TSSOP 20 .169 .177 1 .252 .260 6.4 6.6 .0256 BSC 0.65 4.3 4.5 .047 1.20 Max .007 .012 0.19 0.30 .018 .030 0.45 0.75 .238 .269 6.1 6.7 .004 0.09 .008 0.20 SEATING PLANE .002 0.05 .006 0.15 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS 6 Copyright © Potato Semiconductor Corporation PO74G245B 1.2v-3.6v, 8-bit Bidirectional Transceiver with 3 state outputs 04/26/09 74 Series GHz Logic Ordering Information Ordering Code Package Top-Marking TA PO74G245ASU 20pin TSSOP Tube Pb-free & Green PO74G245AS -40°C to 85°C PO74G245ASR 20pin TSSOP Tape and reel Pb-free & Green PO74G245AS -40°C to 85°C IC Package Information PACKAGE CODE T PACKAGE TYPE TSSOP 20 TAPE WIDTH (mm) 16 TAPE PITCH (mm) 8 PIN 1 LOCATION Top Left Corner TAPE TRAILER LENGTH 39 (12”) QTY PER REEL TAPE LEADER LENGTH 3000 64 (20”) QTY PER TUBE 74 7 Copyright © Potato Semiconductor Corporation