Revised January 2002 74ALVCH2245 Low Voltage Bidirectional Transceiver with Bushold and 26Ω Series Resistors in B Outputs General Description Features The ALVCH2245 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. The ALVCH2245 data inputs include active bushold circuitry, eliminating the need for external pull-up resistors to hold unused or floating data inputs at a valid logic level. The 74ALVCH2245 is designed for low voltage (1.65V to 3.6V) VCC applications. The ALVCH2245 is also designed with 26Ω series resistance in the B Port outputs. This design reduces line noise in applications such as memory address drivers, clock drivers, and bus transceivers transmitters The 74ALVCH2245 is fabricated with an advanced CMOS technology to achieve high-speed operation while maintaining low CMOS power dissipation. ■ 1.65V to 3.6V VCC supply operation ■ 3.6V tolerant control inputs ■ Bushold on data inputs eliminates the need for external pull-up/pull-down resistors ■ 26Ω series resistors in B Port outputs ■ tPD (A to B) 4.9 ns max for 3.0V to 3.6V VCC 6.1 ns max for 2.3V to 2.7V VCC 9.8 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 Ordering Code: Order Number Package Number 74ALVCH2245WM M20B 74ALVCH2245MTC 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 Connection Diagram Quiet Series is a trademark of Fairchild Semiconductor Corporation. © 2002 Fairchild Semiconductor Corporation ds500716 www.fairchildsemi.com 74ALVCH2245 Low Voltage Bidirectional Transceiver with Bushold January 2002 74ALVCH2245 Pin Descriptions Pin Names Truth Table Description Inputs Outputs OE Output Enable Input (Active LOW) OE T/R Transmit/Receive Input L L Bus B0–B7 Data to Bus A0–A7 A0–A7 Side A Bushold Inputs or 3-STATE Outputs L H Bus A0–A7 Data to Bus B0–B7 B0–B7 Side B Bushold Inputs or 3-STATE Outputs H X HIGH Z State on A0–A7, B0–B7 T/R H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance Logic Diagram www.fairchildsemi.com 2 Recommended Operating Conditions (Note 3) −0.5V to +4.6V Supply Voltage (VCC) −0.5V to 4.6V DC Input Voltage (VI) Output Voltage (VO) (Note 2) 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 1: 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 −65°C to +150°C Note 2: IO Absolute Maximum Rating must be observed. Note 3: Floating or unused control inputs must be held HIGH or LOW. DC Electrical Characteristics Symbol VIH VIL VOH VOL II Parameter Conditions HIGH Level Input Voltage LOW Level Input Voltage VCC (V) Min 1.65 - 1.95 0.65 x VCC 2.3 - 2.7 1.7 2.7 - 3.6 2.0 Max V 1.65 - 1.95 0.35 x VCC 2.3 - 2.7 0.7 2.7 - 3.6 0.8 HIGH Level Output Voltage IOH = −100 µA A Outputs IOH = −4 mA 1.65 1.2 IOH = −6 mA 2.3 2.0 IOH = −12 mA 2.3 1.7 2.7 2.2 3.0 2.4 1.65 - 3.6 3.0 2 HIGH Level Output Voltage IOH = −100 µA 1.65 - 3.6 VCC - 0.2 B Outputs IOH = −2 mA 1.65 1.2 IOH = −4 mA 2.3 1.9 IOH = −6 mA 2.3 1.7 3.0 2.4 IOH = −8 mA 2.7 2 IOH = −12 mA 3.0 2 LOW Level Output Voltage IOL = 100 µA 1.65 - 3.6 0.2 A Outputs IOL = 4 mA 1.65 0.45 V 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 Voltage IOL = 100 µA 1.65 - 3.6 0.2 B Outputs IOL = 2 mA 1.65 0.45 IOL = 4 mA 2.3 0.4 IOL = 6 mA 2.3 0.55 3.0 0.55 IOL = 8 mA 2.7 0.6 IOL = 12 mA 3.0 0.8 0 ≤ VI ≤ 3.6V 1.65 - 3.6 ±5.0 3 V VCC - 0.2 IOH = −24 mA Input Leakage Current Units V µA www.fairchildsemi.com 74ALVCH2245 Absolute Maximum Ratings(Note 1) 74ALVCH2245 DC Electrical Characteristics Symbol (Continued) Parameter VCC Conditions Min Max Units (V) II(HOLD) Bushold Input Maximum VIN = 0.58V 1.65 25 Drive Hold Current VIN = 1.07V 1.65 −25 VIN = 0.7V 2.3 45 VIN = 1.7V 2.3 −45 VIN = 0.8V 3.0 75 VIN = 2.0V 3.0 −75 0 < VO ≤ 3.6V 3.6 ±500 1.65 - 3.6 ±10 µA 3.6 40 µA 2.7 - 3.6 750 µA IOZ 3-STATE Output Leakage 0 ≤ VO ≤ 3.6V, VI = VIH or VIL ICC Quiescent Supply Current VI = VCC or GND, IO = 0 ∆ICC Increase in ICC per Input VIH = VCC − 0.6V µA AC Electrical Characteristics TA = −40°C to +85°C, RL = 500Ω Symbol tPHL, tPLH Parameter CL = 50 pF VCC = 3.3V ± 0.3V CL = 30 pF VCC = 2.7V VCC = 2.5 ± 0.2V VCC = 1.8V ± 0.15V Min Max Min Max Min Max Min Max 1.1 4.9 1.3 6.1 0.8 5.6 1.5 9.8 1.1 4.0 1.3 4.7 0.8 4.2 1.5 8.4 1.1 5.5 1.3 7.1 0.8 6.6 1.5 9.8 1.1 5.0 1.3 6.1 0.8 5.6 1.5 9.8 1.1 4.7 1.3 5.2 0.8 4.7 1.5 8.5 1.1 4.1 1.3 4.5 0.8 4.0 1.5 7.2 Units Propagation Delay A to B ns Propagation Delay B to A tPZL, tPZH Output Enable Time A to B ns Output Enable Time B to A tPLZ, tPHZ Output Disable Time A to B ns Output Disable Time B to A Capacitance Symbol Parameter Conditions TA = +25°C VCC Typical Units CIN Input Capacitance VI = 0V or VCC 3.3 6 pF CIO Input, Output Capacitance VO = 0V or VCC 3.3 7 pF CPD Power Dissipation Capacitance 3.3 20 2.5 20 www.fairchildsemi.com Outputs Enabled f = 10 MHz, CL = 50 pF 4 pF TABLE 1. Values for Figure 1 TEST SWITCH tPLH, tPHL Open tPZL, tPLZ VL tPZH, tPHZ GND FIGURE 1. AC Test Circuit TABLE 2. Variable Matrix (Input Characteristics: f = 1MHz; tr = tf = 2ns; ZO = 50Ω) Symbol VCC 3.3V ± 0.3V 2.7V 2.5 ± 0.2V 1.8V ± 0.15V Vmi 1.5V 1.5V VCC/2 VCC/2 Vmo 1.5V 1.5V VCC/2 VCC/2 VX VOL + 0.3V VOL + 0.3V VOL + 0.15V VOL + 0.15V VY VOH − 0.3V VOH − 0.3V VOH − 0.15V VOH − 0.15V VL 6V 6V VCC*2 VCC*2 FIGURE 2. Waveform for Inverting and Non-inverting Functions FIGURE 3. 3-STATE Output High Enable and Disable Times for Low Voltage Logic FIGURE 4. 3-STATE Output Low Enable and Disable Times for Low Voltage Logic 5 www.fairchildsemi.com 74ALVCH2245 AC Loading and Waveforms 74ALVCH2245 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 74ALVCH2245 Low Voltage Bidirectional Transceiver with Bushold Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 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