ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs Product Features Product Description • 4.5V to 5.5V on A-port and 2.7V to 3.6V on B-port • Latch-up performance exceeds 200mA Per JESD78 • ESD protection exceeds JESD 22 - 2000V Human-Body Model (A114-B) - 200V Machine Model (A115-A) • Industrial Temperature: –40°C to +85°C • Available Packages: - 24-pin 173-mil wide plastic TSSOP (L) - 24-pin 150-mil wide plastic QSOP (Q) - 24-pin 300-mil wide plastic SOIC (S) Pericom Semiconductor’s PI74LVC series of logic circuits are produced using the Company’s advanced submicron CMOS technology, achieving industry leading speed. The PI74LVC4245A is a non-inverting 8-bit Bidirectional Transceiver that uses two separate power supply rails. A-port (VCCA) is set to operate at 5V and B-port (VCCB) is set to operate at 3.3V. This allows for translation from a 3.3V to a 5Venvironment and vice-versa. This tranceiver is designed for asynchronous two-way communication between data buses. The direction control input pin (DIR) determines the dataflow from the A bus to the B bus or from the B bus to the A bus. The output enable (OE) input, when HIGH, disables both A and B ports by placing them in HIGH Z condition. Logic Block Diagram Product Pin Configuration DIR 2 (5V) VCCA 1 24 VCCB (3.3V ) DIR 2 23 VCCB (3.3V ) A1 3 22 OE A2 4 21 B1 A3 5 20 B2 A4 6 19 B3 B3 A5 7 18 B4 A6 8 17 B5 18 B4 A7 9 16 B6 17 A8 10 15 B7 B5 GND 11 14 B8 16 B6 GND 12 13 GND 22 A1 3 OE 21 B1 A2 4 20 B2 A3 5 19 A4 6 A5 7 A6 8 A7 9 15 B7 A8 10 14 B8 Product Pin Description Truth Table(1) Inputs Outputs Pin Name Description OE 3-State Output Enable Inputs (Active LOW) DIR Direction Control Input Ax Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs OE DIR L L Bus B Data to Bus A Bx L H Bus A Data to Bus B GND Ground H X Z (Isolation) VCCA,VCCB Power Note: 1. H = High Signal Level X = Don’t Care or Irrelevant L = Low Signal Level Z = High Impedance 1 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Supply voltage range, VCCA and VCCB ............................ –0.5V to +7V Input voltage range, VI(2) : I/O ports (A-port) .... –0.5V to VCCA +0.5V I/O ports (B-port) ........... –0.5V to VCCB+0.5V Control Pins ................. –0.5V to VCCA +0.5V Input clamp current, IIK (VI <0)................................................–50mA Output clamp current, IOK (VO <0)...........................................–50mA Continous Output Current IO ..................................................±50mA Continous Current through each VCC or GND pin .......................±100mA Package thermal impedance, θJA(3): package L...................... 84°C/W package Q...................... 98°C/W package S ...................... 79°C/W Storage Temperature range, Tstg ................................–65°C to 150°C Notes: 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. 2. This value is limited to 7V maximum. 3. The package thermal impedance is calculated in accordance with JESD 51. Recommended Operating Conditions for VCCA = 4.5V to 5.5V(4) Parameter Description Min. Max. 4.5 5.5 VCCA Supply Voltage VIH High-Level Input Voltage VIL Low-Level Input Voltage VI Input Voltage 0 VCCA VO Output Voltage 0 VCCA IOH High-Level Output Current –24 IOL Low-Level Output Current 24 TA Operating Free-Air Temperature Units 2 0.8 –40 V mA 85 °C Notes: 4. All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation. Recommended Operating Conditions for VCCB = 2.7V to 3.6V(4) Parameter Description Min. Max. 2.7 3.6 VCCB Supply Voltage VIH High-Level Input Voltage VCCB = 2.7V to 3.6V VIL Low-Level Input Voltage VCCB = 2.7V to 3.6V VI Input Voltage 0 VCCB VO Output Voltage 0 VCCB IOH High-Level Output Current IOL Low-Level Output Current TA Operating Free-Air Temperature Units 2 0.8 VCCB = 2.7V –12 VCCB = 3V –24 VCCB = 2.7V 12 VCCB = 3V 24 –40 V mA 85 °C Notes: 4. All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation. 2 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs DC Electrical Characteristics (Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified) A-Port (5V) Parameters VOH VOL Description Minimum High Level Output Voltage Maximum Low Level Output Voltage Test Conditions VCCA IOH = –100µA IOH = –24mA IOL = 100µA IOL = 24mA VCCB Min. Typ.(5) Max. 4.5V 2.7V to 3.6V 4.4 4.5 5.5V 2.7V to 3.6V 5.4 5.5 4.5V 2.7V to 3.6V 3.7 4.17 5.5V 2.7V to 3.6V 4.7 5.2 4.5V 2.7V to 3.6V 0.1 5.5V 2.7V to 3.6V 0.1 4.5V 2.7V to 3.6V 0.19 0.5 5.5V 2.7V to 3.6V 0.19 0.5 5.5V 2.7V to 3.6V ±1 II Maximum Input Leakage Current (Control Inputs) IOZ(6) Maximum 3-State Output Leakage Current VO = VCCA or GND (A port) 5.5V 2.7V to 3.6V ±5 ICCA Quiescent VCCA Supply VI = VCCA or GND, Current IO = 0 5.5V 2.7V to 3.6V 10 ∆ ICCA(7) ICCA per input (A port and Control Inputs) 5.5V 2.7V to 3.6V 0.65 CI Input Capacitance (ConVI = VCCA or GND trol Inputs) Open 2.7V to 3.6V 2.4 CIO Input/Output Capacitance (A port) 5V 2.7V to 3.6V 9.5 VI = VCCA or GND One Input at 3.4V, other inputs at VCCA or GND 1.5 Units V µA mA pF VO = VCCA or GND Notes: 5. All typical values are measured at VCCA = 5V, TA = 25°C 6. For I/O ports, the parameter IOZ includes the input leakage current. 7. This is the increase in supply current for each input that is at one of the specified voltage levels, rather than 0V or the associated VCC. 3 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs DC Electrical Characteristics (Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified) B-Port (3.3V) Parameters Description VOH VOL Minimum High Level Output Voltage Maximum Low Level Output Voltage Test Conditions VCCA VCCB Min. Typ. Max. Units 4.5V to 5.5V 2.7V to 3.6V VCC –0.1 4.5V to 5.5V 2.7V 2.2 2.56 4.5V to 5.5V 3V 2.4 2.85 IOH = –24mA 4.5V to 5.5V 3V 2 2.70 IOL = 100µA 4.5V to 5.5V 2.7V to 3.6V IOL = 12mA 4.5V to 5.5V 2.7V 0.09 0.4 IOL = 24mA 4.5V to 5.5V 3V 0.18 0.5 IOH = –100µA IOH = –12mA V 0.1 IOZ(6) Maximum 3-State Output Leakage Current (B port) VO = VCCB or GND 4.5V to 5.5V 3.6V ±5 ICCB Quiescent VCCB Supply Current VI = VCCB or GND, IO = 0 4.5V to 5.5V 3.6V 10 ∆ICCB(7) ICCB per input One Input at VCCB –0.6V, other inputs at VCCB or GND 4.5V to 5.5V 2.7V to 3.6V 50 CIO Input/Output Capacitance (B port) VO = VCCB or GND 4.5V to 5.5V 3.3V µA 9.7 pF Notes: 5. All typical values are measured at VCCB = 3.3V, TA = 25°C 6. For I/O ports, the parameter IOZ includes the input leakage current. 7. This is the increase in supply current for each input that is at one of the specified voltage levels, rather than 0V or the associated VCC. Capacitance (VCCA = 4.5V to 5.5V, VCCB = 2.7V to 3.6V, TA = 25°C) Parameters Description CPD Power Dissipation Capacitance (7) Test Conditions Outputs Enabled Outputs Disabled CL = 0pF, f = 10 MHz Typ. Units 20 pF 2.3 Notes: 7. CPD is defined as the value of the internal equivalent capacitance which is derived from dynamic operating current consumption (ICCD) at no output loading and operating at 50% duty cycle, CPD is related to ICCD dynamic operating current by the expression: ICCD = (CPD)(VCC)(fIN) +(ICC static) 4 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs AC Electrical Characteristics (Over Recommended Operating Free-Air Temperature Range unless otherwise noted, See Figure 1 and 2) Parameters tPHL tPLH tPHL tPLH tPZL tPZH tPZL tPZH tPLZ tPHZ tPLZ tPHZ tSK(O) From (Input) To (Output) A B B A OE A OE B OE A OE B Output-to-Output VCCA =5V ± 0.5V,VCCB = 2.7V to 3.6V CL = 50pF, RL = 500Ω Skew(8) Units Min. Max. 1 5.7 1 5.5 1 6.1 1 5.9 1 8 1 7.6 1 8 1 7.7 1 6.2 1 5.8 1 7 1 6.8 ns 1.5 Note: 8. Skew between any two outputs of the same device, switching in the same direction. Parameter guaranteed by design. Power- Up Considerations To avoid excessive supply current, bus contention or oscillation during power-up, the following guidelines should be followed: 1. Connect ground first before any supply voltage is applied. 2. Then Power up VCCA, which is the control side of the device. 3. Ramp OE ahead of or with VCCA to help prevent bus contention 4. Ramp DIR with VCCA if DIR HIGH is needed (A bus to B bus). Otherwise keep DIR LOW. 5 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs PARAMETER MEASUREMENT INFORMATION FOR B TO A PORT VCCA = 5V ± 0.5V and VCCB = 2.7V to 3.6V 2xVCCA 500Ω From Output Under Test CL = 50pF S1 Open GND 500Ω (See Note A) Test S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 x VCCA GND Load Circuit 3V Output Control 3V Input 1.5V 50% VCCA Output tPLZ Output Waveform 1 S1 at 2x VCCA (see Note B) t PZH 0V tPHL VOH 50% VCCA VOL Output Waveform 2 S1 at GND (see Note B) Voltage Waveforms Propagation Delay Times 1.5V 0V tPZL 1.5V tPLH 1.5V VCCA 50%VCCA VOL +0.3V VOL tPHZ 50%VCCA VOH –0.3V VOH 0V Voltage Waveforms Enable and Disable Times Figure 1. Load Circuit and Voltage Waveforms Notes: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input impulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns. D. The outputs are measured one at a time with one transition per measurement. 6 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs PARAMETER MEASUREMENT INFORMATION FOR A TO B PORT VCCA = 4.5V to 5.5V and VCCB = 2.7V to 3.6V 7V S1 500Ω From Output Under Test CL = 50 50pF Open GND 500Ω (See Note A) Load Circuit 1.5V 0V Output tPHL VOH 1.5V tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 7V GND 3V 1.5V 1.5V VOL Voltage Waveforms Propagation Delay Times 1.5V 0V tPZL 1.5V tPLH S1 Output Control 3V Input Test tPLZ Output Waveform 1 S1 at 7V (see Note B) t PZH 1.5V Output Waveform 2 S1 at GND (see Note B) 1.5V 3.5V VOL +0.3V VOL tPHZ VOH –0.3V VOH 0V Voltage Waveforms Enable and Disable Times Figure 2. Load Circuit and Voltage Waveforms Notes: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. All input impulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns. D. The outputs are measured one at a time with one transition per measurement. 7 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs Packaging Mechanical: 24-pin TSSOP (L) 24 .169 .177 4.3 4.5 .004 .008 1 .303 .311 7.7 7.9 0.45 0.75 .047 1.20 Max .007 .012 0.19 0.30 .0256 BSC 0.65 .002 .006 0.09 0.20 .018 .030 .252 BSC 6.4 SEATING PLANE 0.05 0.15 X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS Packaging Mechanical: 24-pin QSOP (Q) 24 .008 0.20 MIN. .150 .157 3.81 3.99 Guage Plane .010 0.254 .016 .035 0.41 0.89 Detail A 1 .337 .344 .053 .069 .015 x 45˚ 0.38 1.35 1.75 Detail A .007 .010 SEATING PLANE .025 typical 0.635 0˚-6˚ .041 1.04 REF 8.56 8.74 .033 0.84 .008 .013 0.20 0.33 .008 0.203 .012 0.305 0.178 0.254 .016 0.406 .050 1.27 .004 0.101 .010 0.254 .228 .244 5.79 6.20 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS 8 P-0.2 08/11/03 ADVANCE INFORMATION PI74LVC4245A 8-Bit Dual Supply Bus Transceiver with 3-State Outputs Packaging Mechanical: 24-pin SOIC (S) 24 .2914 .2992 7.40 7.60 0.254 x 45˚ 0.737 .010 .029 1 .0091 .0125 0-8˚ .5985 15.20 .6141 15.60 0.23 0.32 0.41 .016 1.27 .050 .021 0.533 .031 0.787 .0926 2.35 .1043 2.65 SEATING PLANE .050 BSC .0040 .0118 .013 .020 0.33 0.51 1.27 .394 .419 10.00 10.65 0.10 0.30 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS Ordering Information Ordering Code Package Code Package Type PI74LVC4245AL L 24-pin, 173-mil wide plastic TSSOP PI74LVC4245AQ Q 24-pin, 150-mil wide plastic QSOP PI74LVC4245AS S 24-pin, 300-mil wide plastic SOIC Notes: 1. Thermal characteristics can be found on the company web site at http://www.pericom.com/packaging/mechanicals.php Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 9 P-0.2 08/11/03