DM74ALS257SJX

Revised February 2000 DM74ALS257 • DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer General Description Features These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four 3STATE outputs that can interface directly with data lines of bus-organized systems. A 4-bit word selected from one of two sources is routed to the four outputs. The DM74ALS257 presents true data whereas the DM74ALS258 presents inverted data to minimize propagation delay time. ■ Switching specifications at 50 pF This 3-STATE output feature means that n-bit (paralleled) data selectors with up to 258 sources can be implemented for data buses. It also permits the use of standard TTL registers for data retention throughout the system. ■ Switching specifications guaranteed over full temperature and VCC range ■ Advanced oxide-isolated, ion-implanted Schottky TTL process ■ Functionally and pin for pin compatible with Schottky and low power Schottky TTL counterpart ■ Improved AC performance over Schottky and low power Schottky counterparts ■ 3-STATE buffer-type outputs drive bus lines directly ■ Expand any data input point ■ Multiplex dual data buses ■ General four functions of two variables (one variable is common) ■ Source programmable counters Ordering Code: Order Number Package Number Package Description DM74ALS257M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74ALS257SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74ALS257N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide DM74ALS258M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74ALS258N 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 Inputs Output Output Y Select A B H X X X Z Z L L L X L H L L H X H L L H X L L H L H X H H L Control DM74ALS257 DM74ALS258 H = HIGH Level L = LOW Level X = Don't Care Z = High Impedance (OFF) © 2000 Fairchild Semiconductor Corporation DS006227 www.fairchildsemi.com DM74ALS257 • DM74ALS258 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer April 1984 DM74ALS257 • DM74ALS258 Logic Diagrams DM74ALS257 DM74ALS258 www.fairchildsemi.com 2 Supply Voltage 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 73.0°C/W M Package 102.0°C/W Recommended Operating Conditions Symbol Parameter Min Nom Max Units 4.5 5 5.5 V LOW Level Input Voltage 0.8 V VCC Supply Voltage VIH HIGH Level Input Voltage VIL 2 V IOH HIGH Level Output Current −2.6 mA IOL LOW Level Output Current 24 mA TA Free Air Operating Temperature 70 °C 0 Electrical Characteristics over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C. Symbol Parameter Conditions VIK Input Clamp Voltage VCC = 4.5V, II = −18 mA VOH HIGH Level VCC = 4.5V VOL Output Voltage IOH = −0.4 mA LOW Level VCC = 4.5V Input Current at Maximum Typ 2.4 3.3 Units V V VCC − 2 V IOL = 12 mA 0.25 0.4 IOL = 24 mA 0.35 0.5 V 0.1 mA VCC = 5.5V, VIH = 7V Input Voltage Max −1.5 IOH = −2.6 mA Output Voltage II Min V IIH HIGH Level Input Current VCC = 5.5V, VIH = 2.7V 20 µA IIL LOW Level Input Current VCC = 5.5V, VIL = 0.4V −0.1 mA IO Output Drive Current VCC = 5.5V, VO = 2.25V −112 mA IOZH OFF-State Output Current VCC = 5.5V, HIGH Level Voltage Applied VO = 2.7V 20 µA OFF-State Output Current, VCC = 5.5V, LOW Level Voltage Applied VO = 0.4V −20 µA IOZL ICCH ICCL ICCZ Supply DM74ALS257 VCC = 5.5V Current DM74ALS258 Outputs OPEN Supply DM74ALS257 Current DM74ALS258 Supply DM74ALS257 Current DM74ALS258 −30 Outputs HIGH Outputs LOW Outputs Disabled 3 3 6 mA 2.5 4 mA 8 12 mA 7 11 mA 9 14 mA 8 13 mA www.fairchildsemi.com DM74ALS257 • DM74ALS258 Absolute Maximum Ratings(Note 1) DM74ALS257 • DM74ALS258 Switching Characteristics DM74ALS257 over recommended operating free air temperature range Symbol tPLH tPHL Parameter Conditions 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 tZH tZL tHZ tLZ From To Min Max Units Data Any Y 2 10 ns Data Any Y 2 12 ns Select Any Y 4 18 ns Select Any Y 5 22 ns Any Y 4 16 ns Any Y 5 18 ns Any Y 2 10 ns Any Y 3 15 ns From To Min Max Units Data Any Y 2 8 ns Data Any Y 2 7 ns Select Any Y 3 20 ns Select Any Y 5 25 ns Any Y 5 18 ns Any Y 5 18 ns Any Y 2 10 ns Any Y 3 18 ns Output Enable Time Output to HIGH Level Control Output Enable Time Output to LOW Level Control Output Disable Time Output from HIGH Level Control Output Disable Time Output from LOW Level Control Switching Characteristics DM74ALS258 over recommended operating free air temperature range Symbol tPLH tPHL Parameter Conditions 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 tZH tZL tHZ tLZ Output Enable Time Output to HIGH Level Control Output Enable Time Output to LOW Level Control Output Disable Time Output from HIGH Level Control Output Disable Time Output from LOW Level Control www.fairchildsemi.com 4 DM74ALS257 • DM74ALS258 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A 5 www.fairchildsemi.com DM74ALS257 • DM74ALS258 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D www.fairchildsemi.com 6 DM74ALS257 • DM74ALS258 3-STATE Quad 1-of-2-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 7 www.fairchildsemi.com