National | Semiconductor DM54S253/DM74S253 Dual TRI-STATE 1 of 4 Line Data Selectors/ Multiplexers General Description Each of these Schottky-clamped data selectors/multipiex- ers contains inverters and drivers to supply fully comple- mentary, on-chip, binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two four-line sections. The TRI-STATE outputs can interface directly with data lines of bus-organized systems. With all but one of the com- mon outputs disabled (at a high impadance state), the low impedance of the single enable output will drive the bus line to @ high or low logic level. Features g@ TRI-STATE version of $153 with same pin-out B@ Schottky-diode-clamped transistors m Permits multiplexing from N lines to 1 line w Performs parallel-T-serial conversion @ Strobe/output control @ High fan-out totem-pole outputs @ Typical propagation delay From data to output 6 ns From select to output 12 ns @ Typical power dissipation 275 mW Connection Diagram Dual-in-Line Package OUTPUT CONTROL DATA INPUTS OUTPUT _Q_avae eee SELECT + 2 Yec 16 15 14 13 12 11 3 1 2 7 1 CONTROL SELECT <~-"_ 1 Gt DATA INPUTS TL/F/64B1-1 Order Number DM54S253J, DM54S253W or DM74S253N NS Package Number J16A, N16E or W16A Function Table Select Output Inputs Data Inputs Control Output B A|Co Ct c2 C3 G Y x xX x x x x H Z L LIL x x X L L L bt|uH x x x L H L HY xX L x X L L L oH x H x x L H H L x X L xX L L HL x x H xX 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 = Dont Care, Z = High Impedance 3-109 S2S $253 Absolute Maximum Ratings (ote) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage 7V Input Voltage .5V Note: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaran- teed. The device should not be operated at these iimits. The parametric values defined in the Electrical Characteristics fable are not guaranteed at the absolute maximum ratings. The Recommended Operating Conditions table wil! define Operating Free Air Temperature Range DM54S DM74S Storage Temperature Range 55G to + 125C C to + 70C 65C to + 150C Recommended Operating Conditions the conditions for actual device operation. Symbol Parameter DM54S253 DM74S253 Units Min Nom Max Min Nom Max Voc Supply Voltage 4.5 5 5.5 4.75 5 5.25 Vv Vin High Level input Voltage 2 2 v Vi Low Levet input Voltage 0.8 0.8 Vv low High Leve! Output Current ~2 -6.5 mA loL Low Level Output Current 20 20 mA Ta Free Air Operating Temperature 55 125 0 70 C Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 1) Vv Input Clamp Voltage Voc = Min, || = 18 mA 1.2 Vv Vou High Level Output Voc = Min, Joy = Max DM54 2.4 3.4 . Vv Voltage Vit = Max, Vin = Min DM74 24 392 VoL Low Level Output Voc = Min, lo, = Max 05 Vv Voltage Vin = Min, Vil = Max , I Input Current @ Max Voc = Max, V| = 5.5V 1 mA Input Voltage liq High Level Input Voc = Max, V\ = 2.7V 50 pA Current hie Low Level Input Veco = Max, V| = 0.5V 2 mA Current fozH Off-State Output Current with Voc = Max, Vo = 2.4V High Level Output Vin = Min, Vi, = Max 50 pA Voltage Applied loz- Off-State Output Current with Voc = Max, Vo = 0.5V 50 A Low Level Output Vin = Min, Vi_ = Max p Voltage Applied los Short Circuit Voc = Max DM54 40 100 mA Output Current (Note 2) DM74 40 ~100 loc Supply Current Veco = Max (Note 3) 55 70 mA Note 1: All typicals are at Voc = 5V, Ta = 25C. Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 3: icc is measured with all outputs open. 3-110 Switching Characteristics a Voc = 5V and T, = 25C (See Section 1 for Test Waveforms and Output Load) R, = 2800 Symbol Pp et From (Input) c ymbo arameter To (Output) . = 15 pF C_ = 50 pF Units Min Max Min Max teLH Propagation Delay Time Data 9 12 ns Low to High Level Output to Y tpHL Propagation Delay Time Data 9 12 ns High to Low Level Output toY teLy Propagation Delay Time Select 48 24 ns Low to High Level Output to teHL Propagation Delay Time Select 18 24 ns High to Low Level Output to Y tpzH Output Enable Time Output Control to High Level Output toY 16.5 19.5 ns tpa. Output Enable Time Output Control 18 24 ns to Low Level Output to tpyz Output Disable Time to Output Control 95 ns High Level Output (Note 1) toY , tpiz Output Disable Time Output Control 45 ns to Low Level Output (Note 1) toY Note 1: C, = 5 pF. Logic Diagram output 1) CONTROL G1 (8) 1c0 (5) 1c1 (7) DATA 1 (4) OUTPUT Y1 1 3 1 (3) z B! } SELECT (14) A (10) (11) 2c DATA 2 (12) ) 2c2 OUTPUT Y2 (43) output (15) CONTROL G2 TL/F/6481-2 3-111 SS