Revised September 2001 74ALVC245 Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs General Description Features The ALVC245 contains eight non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus oriented applications. The T/R input determines the direction of data flow. The OE input disables both the A and B ports by placing them in a high impedance state. ■ 1.65V-3.6V VCC supply operation The 74ALVC245 is designed for low voltage (1.65V to 3.6V) VCC applications with I/O compatibility up to 3.6V. ■ tPD The 74ALVC245 is fabricated with an advanced CMOS technology to achieve high-speed operation while maintaining low CMOS power dissipation. ■ 3.6V tolerant inputs and outputs ■ Power-off high impedance inputs and outputs ■ Supports Live Insertion and Withdrawal (Note 1) 3.4 ns max for 3.0V to 3.6V VCC 3.9 ns max for 2.3V to 2.7V VCC 6 ns max for 1.65V to 1.95V VCC ■ Uses patented Quiet Series noise/EMI reduction circuitry ■ Latchup conforms to JEDEC JED78 ■ ESD performance: Human body model > 2000V Machine model > 200V Note 1: To ensure the high impedance state during power up and power down, OEn should be tied to VCC through a pull up resistor. The minimum value of the resistor is determined by the current sourcing capability of the driver. Ordering Code: Order Number Package Number 74ALVC245WM M20B 74ALVC245MTC MTC20 Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol Pin Descriptions Pin Names Description OE Output Enable Input (Active LOW) T/R Transmit/Receive Input A0–A7 Side A Inputs or 3-STATE Outputs B0–B7 Side B Inputs or 3-STATE Outputs Quiet Series is a trademark of Fairchild Semiconductor Corporation. © 2001 Fairchild Semiconductor Corporation DS500647 www.fairchildsemi.com 74ALVC245 Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs September 2001 74ALVC245 Connection Diagram Truth Table Inputs OE Outputs T/R L L Bus B0–B7 Data to Bus A0–A7 L H Bus A0–A7 Data to Bus B0–B7 H X HIGH Z State on A0–A7, B0–B7 (Note 2) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance Note 2: Unused bus terminals during HIGH Z State must be held HIGH or LOW. Logic Diagram www.fairchildsemi.com 2 Recommended Operating Conditions (Note 5) −0.5V to +4.6V Supply Voltage (VCC) −0.5V to 4.6V DC Input Voltage (VI) Output Voltage (VO) (Note 4) Power Supply −0.5V to VCC +0.5V Operating DC Input Diode Current (IIK) VI < 0V −50 mA 0V to VCC Output Voltage (VO) DC Output Diode Current (IOK) 0V to VCC Free Air Operating Temperature (TA) VO < 0V −50 mA −40°C to +85°C Minimum Input Edge Rate (∆t/∆V) VIN = 0.8V to 2.0V, VCC = 3.0V DC Output Source/Sink Current ±50 mA (IOH/IOL) ±100 mA Supply Pin (ICC or GND) 10 ns/V Note 3: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. DC VCC or GND Current per Storage Temperature Range (TSTG) 1.65V to 3.6V Input Voltage (VI) −65°C to +150°C Note 4: IO Absolute Maximum Rating must be observed, limited to 4.6V. Note 5: Floating or unused control inputs must be held HIGH or LOW. DC Electrical Characteristics Symbol VIH VIL VOH VOL Parameter Conditions HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Voltage IOH = −100 µA IOL (V) Min 1.65 - 1.95 0.65 x VCC 2.3 - 2.7 1.7 2.7 - 3.6 2.0 Max 0.35 x VCC 2.3 - 2.7 0.7 2.7 - 3.6 0.8 1.65 - 3.6 1.2 IOH = −6 mA 2.3 2.0 IOH = −12 mA 2.3 1.7 2.7 2.2 V 3.0 2.4 IOH = −24 mA 3.0 2 IOL = 100 µA 1.65 - 3.6 0.2 1.65 0.45 IOL = 6 mA 2.3 0.4 IOL = 12 mA 2.3 0.7 2.7 0.4 IOL = 24 mA 3.0 0.55 LOW Level Output Current V VCC - 0.2 1.65 High Level Output Current Units V 1.65 - 1.95 IOH = −4 mA IOL = 4 mA IOH VCC 1.65 −4 2.3 −12 2.7 −12 3.0 −24 1.65 4 2.3 12 2.7 12 3 24 V mA mA II Input Leakage Current 0 ≤ VI ≤ 3.6V 3.6 ±5.0 µA IOZ 3-STATE Output Leakage 0 ≤ VO ≤ 3.6V 3.6 ±10 µA ICC Quiescent Supply Current VI = V CC or GND, IO = 0 3.6 10 µA ∆ICC Increase in ICC per Input VIH = VCC − 0.6V 3 - 3.6 750 µA 3 www.fairchildsemi.com 74ALVC245 Absolute Maximum Ratings(Note 3) 74ALVC245 AC Electrical Characteristics TA = −40°C to +85°C, RL = 500Ω Symbol CL = 50 pF Parameter VCC = 3.3V ± 0.3V CL = 30 pF VCC = 2.7V Min VCC = 2.5V ± 0.2V VCC = 1.8V ± 0.15V Units Min Max Max Min Max Min Max tPHL, tPLH Propagation Delay 1.3 3.4 3.9 1.0 3.5 1.5 6.0 tPZL, tPZH Output Enable Time 1.6 5.5 6.3 2.0 6.0 2.7 8.6 ns tPLZ, tPHZ Output Disable Time 1.7 5.5 5.3 0.8 4.8 1.5 8.0 ns ns Capacitance Symbol Parameter Conditions TA = +25°C Units VCC Typical CIN Input Capacitance Control VI = 0V or VCC 3.3 3 CI/O Input/ Output Capacitance A or B Ports VI = 0V or VCC 3.3 6 CPD Power Dissipation Capacitance Outputs Enabled f = 10 MHz, CL = 0 pF 3.3 30 2.5 27 1.8 25 3.3 0 2.5 0 1.8 0 Outputs Disabled f = 10 MHz, CL = 0 pF www.fairchildsemi.com 4 pF pF 74ALVC245 AC Loading and Waveforms FIGURE 1. AC Test Circuit TEST SWITCH tPLH, tPHL Open tPZL, tPLZ 6V at VCC = 3.3 ± 0.3V; VCC x 2 at VCC = 2.5 ± 0.2V; 1.8V ± 0.15V tPZH, tPHZ GND FIGURE 2. Waveform for Inverting and Non-Inverting Functions FIGURE 3. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic Symbol VCC 3.3V ± 0.3V 2.5V ± 0.2V 1.8V ± 0.15V Vmi 1.5V VCC/2 VCC/2 Vmo 1.5V VCC/2 VCC/2 VX VOL +0.3V VOL +0.15V VOL +0.15V VY VOH −0.3V VOH −0.15V VOH −0.15V 5 www.fairchildsemi.com 74ALVC245 Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B www.fairchildsemi.com 6 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 7 www.fairchildsemi.com 74ALVC245 Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued)