DM74ALS245A FAIRCHILD | Alldatasheet

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Technical content

Features

■ Advanced oxide-isolated, ion-implanted Schottky TTL process ■ Non-inverting logic output ■ Glitch free bus during power up and down ■ 3-STATE outputs independently controlled on A and B buses ■ Low output impedance to drive terminated transmission lines to 133Ω ■ Switching response specified into 500Ω /50 pF ■ Specified to interface with CMOS at VOH = VCC − 2V ■ PNP inputs to reduce input loading ■ Switching specifications guaranteed over full tempera- ture and VCC range Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table H = HIGH Logic Level L = LOW Logic Level X = Either HIGH or LOW Logic Level Order Number Package Number Package Description DM74ALS245AWM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide DM74ALS245ASJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74ALS245AMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide DM74ALS245AN N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Control Inputs Operation G DIR L L B Data to A Bus L H A Data to B Bus H X Hi-Z

www.fairchildsemi.com 2 DM74ALS245A Absolute Maximum Ratings(Note 1) 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. Recommended Operating Conditions

Electrical Characteristics

over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C. Switching Characteristics (Note 2) over recommended operating free air temperature range Note 2: Switching characteristic conditions are VCC = 4.5V to 5.5V, RL = 500Ω , CL = 50 pF. Supply Voltage 7V Input Voltage Control Inputs 7V I/O Ports 5.5V Operating Free Air Temperature Range 0 °C to +70°C Storage Temperature Range −65°C to +150°C Typical θJA N Package 53.0 °C/W M Package 72.0 °C/W Symbol Parameter Min Typ Max Units VCC Supply Voltage 4.5 5 5.5 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −15 mA IOL LOW Level Output Current 24 mA TA Operating Free Air Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units VIK Input Clamp Voltage V CC = 4.5V, IIN = −18 mA −1.5 V VOH HIGH Level V CC = 4.5V, IOH = −3 mA 2.4 3.2 V Output Voltage V CC = 4.5V, IOH = Max 2 2.3 V IOH = −0.4 mA, VCC = 4.5V to 5.5V V CC − 2V VOL LOW Level Output Voltage V CC = 4.5V I OL = 24 mA 0.35 0.5 V II Input Current at Maximum V CC = 5.5V V IN = 7V Control Inputs 0.1 mA Input Voltage V IN = 5.5V A or B Ports 0.1 IIH HIGH Level Input Current V CC = 5.5V, VIN = 2.7V 20 µA IIL LOW Level Input Current V CC = 5.5V, VIN = 0.4V −0.1 mA IO Output Drive Current V CC = 5.5V, VOUT = 2.25V −30 −112 mA ICC Supply Current V CC = 5.5V Outputs HIGH 30 45 mA Outputs LOW 36 55 mA 3-STATE 38 58 mA Symbol Parameter Circuit Configuration Min Max Units tPLH Propagation Delay Time 31 0 n s LOW-to-HIGH Level Output tPHL Propagation Delay Time 31 0 n s HIGH-to-LOW Level Output tPZL Output Enable Time to LOW Level 5 20 ns tPZH Output Enable Time to HIGH Level 5 20 ns tPLZ Output Disable Time from LOW Level 4 15 ns tPHZ Output Disable Time from HIGH Level 2 10 ns

3 www.fairchildsemi.com DM74ALS245A 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 4 DM74ALS245A Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D

5 www.fairchildsemi.com DM74ALS245A Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide

www.fairchildsemi.com 6 DM74ALS245A Octal 3-STATE Bus Transceiver Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N20A 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: 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 rea- sonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com