Revised February 2000 DM74ALS253 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer General Description Features This Data Selector/Multiplexer contains full on-chip decoding to select one-of-four data sources as a result of a unique two-bit binary code at the Select Inputs. Each of the two Data Selector/Multiplexer circuits have their own separate Data and Output Control inputs and a non-inverting 3STATE output buffer. The Output Control inputs, when at the high level, place the corresponding output in the high impedance OFF-State. In order to prevent bus access conflicts, output disable times are shorter than output enable times. The Select input buffers incorporate internal overlap features to ensure that select input changes do not cause invalid output transients. ■ Advanced oxide-isolated, ion-implanted Schottky TTL process ■ Switching performance is guaranteed over full temperature and VCC supply range ■ Pin and functional compatible with LS family counterpart ■ Improved output transient handling capability ■ Output control circuitry incorporates power-up 3-STATE feature Ordering Code: Order Number Package Number Package Description DM74ALS253M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74ALS253N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Select Data Inputs Output Inputs Output Control B A C0 C1 C2 C3 G Y X X X X X X H Z L L L X X X L L L L H X X X L H L H X L X X L L L H X H X X L H H L X X L X L L H L X X H X L H H H X X X L L L H H X X X H L H Address inputs A and B are common to both sections H = HIGH Level L = LOW Level X = Don't Care Z = High Impedance © 2000 Fairchild Semiconductor Corporation DS006215 www.fairchildsemi.com DM74ALS253 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer April 1984 DM74ALS253 Logic Diagram www.fairchildsemi.com 2 Supply Voltage, VCC 7V Input Voltage 7V Voltage Applied to Disabled Output 5.5V 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. 0°C to +70°C Operating Free Air Temperature Range −65°C to +150°C Storage Temperature Range Typical θJA N Package 78.0°C/W M Package 107.0°C/W Recommended Operating Conditions Symbol Parameter Min Nom Max Units 4.5 5 5.5 V LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −2.6 mA IOL LOW Level Output Current 24 mA TA Free Air Operating Temperature 70 °C VCC Supply Voltage VIH HIGH Level Input Voltage VIL 2 V 0 Electrical Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C. Symbol Parameter Conditions Min VIK Input Clamp Voltage VCC = 4.5V, IIN = −18 mA VOH HIGH Level VCC = 4.5V, IOH = Max Output Voltage IOH = 400 µA, VCC = 4.5V to 5.5V LOW Level VCC = 4.5V VOL Output Voltage 2.4 Typ Max Units −1.5 V 3.2 V VCC − 2 IOL = 12 mA 0.25 0.4 IOL = 24 mA 0.35 0.5 V II Input Current at Maximum input Voltage VCC = 5.5V, VIN = 7V IIH HIGH Level Input Current VCC = 5.5V, VIN = 2.7V 20 µA IIL LOW Level Input Current VCC = 5.5V, VIN = 0.4V −0.1 mA IO Output Drive Current VCC = 5.5V, VOUT = 2.25V −112 mA IOZH OFF-State Output Current, HIGH Bias VCC = 5.5V, VOUT = 2.7V 20 µA IOZL OFF-State Output Current, LOW Bias VCC = 5.5V, VOUT = 0.4V −20 µA ICC Supply Current VCC = 5.5V 0.1 −30 Output HIGH 6.5 mA 12 Output LOW 6.5 12 Output Disabled 7.5 14 mA Min Max Units Select to Y 5 21 ns Select to Y 5 21 ns Data to Y 2 10 ns Data to Y 3 14 ns Switching Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C. From (Input) Symbol Parameter Conditions To (Output) tPLH tPHL Propagation Delay Time VCC = 4.5V to 5.5V LOW-to-HIGH Level Output CL = 50 pF Propagation Delay Time RL = 500Ω HIGH-to-LOW Level Output tPLH Propagation Delay Time LOW-to-HIGH Level Output tPHL Propagation Delay Time HIGH-to-LOW Level Output tPZH Output Enable Time to HIGH Level Output Output Control to Y 3 14 ns tPZL Output Enable Time to LOW Level Output Output Control to Y 4 16 ns tPHZ Output Disable Time from HIGH Level Output Output Control to Y 2 10 ns tPLZ Output Disable Time from LOW Level Output Output Control to Y 2 14 ns 3 www.fairchildsemi.com DM74ALS253 Absolute Maximum Ratings(Note 1) DM74ALS253 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A www.fairchildsemi.com 4 DM74ALS253 3-STATE Dual 1-of-4 Line Data Selector/Multiplexer Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E 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 5 www.fairchildsemi.com