HD74LS257 Quadruple 2-line-to-1-line Data Selectors / Multiplexers (with not inverted 3-state outputs) REJ03D0469–0300 Rev.3.00 Jul.15.2005 This multiplexer features three-state outputs that can interface directly with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state) the low impedance of the single enabled output will drive the bus line to a high or low logic level. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the outputenable circuitry is designed such that the output disable times are shorter than the output enable times. Features • Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation Taping Abbreviation (Quantity) HD74LS257P DILP-16 pin PRDP0016AE-B (DP-16FV) P — PRSP0016DH-B FP (FP-16DAV) Note: Please consult the sales office for the above package availability. HD74LS257FPEL SOP-16 pin (JEITA) EL (2,000 pcs/reel) Pin Arrangement Select 1 16 VCC S 1A 2 1A OC 15 Output Control 1B 3 1B 4A 14 4A 1Y 4 1Y 4B 13 4B 2A 5 2A 4Y 12 4Y 2B 6 2B 3A 11 3A 2Y 7 2Y 3B 10 3B GND 8 9 3Y 3Y (Top view) Rev.3.00, Jul.15.2005, page 1 of 5 HD74LS257 Function Table Inputs OC H L L L L S X L L H H A X L H X X Output B X X X L H Z L H L H Note: H; high level, L; low level, X; irrelevant, Z; off (high-impedance) state of a 3-state output Block Diagram Output Control 1A 1Y 1B 2A 2Y 2B 3A 3Y 3B 4A 4Y 4B S Absolute Maximum Ratings Symbol Ratings Unit Supply voltage Item VCC 7 V Input voltage VIN 7 V Output voltage (off-state) VO (off) 5.5 V Operating temperature Topr –20 to +75 °C PT 400 mW Tstg –65 to +150 °C Power dissipation Storage temperature Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Recommended Operating Conditions Item Supply voltage Output current Operating temperature Rev.3.00, Jul.15.2005, page 2 of 5 Symbol Min Typ Max Unit VCC 4.75 5.00 5.25 V IOH — — –2.6 mA IOL — — 8 mA Topr –20 25 75 °C HD74LS257 Electrical Characteristics (Ta = –20 to +75 °C) Item Input voltage Symbol VIH VIL min. 2.0 — typ.* — — max. — 0.8 Unit V V VOH 2.4 — — V — — — — — — — — — — — — — — — — 0.5 0.4 40 20 –0.8 –0.4 0.2 0.1 — — — — 20 –20 Output voltage VOL S S except S S except S Input current IIH IIL II S except Output current IOZ V Condition VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V, IOH = –2.6 mA IOL = 8 mA VCC = 4.75 V, VIH = 2 V, IOL = 4 mA VIL = 0.8 V µA VCC = 5.25 V, VI = 2.7 V mA VCC = 5.25 V, VI = 0.4 V mA VCC = 5.25 V, VI = 7 V µA VO = 2.4 V VO = 0.4 V VCC = 5.25 V, VIH = 2 V Short-circuit output current IOS –30 — –130 mA VCC = 5.25 V All outputs high — 5.9 10 Supply ICC mA VCC = 5.25 V All outputs low — 9.2 16 current** All outputs off — 10 19 Input clamp voltage VIK — — –1.5 V VCC = 4.75 V, IIN = –18 mA Notes: * VCC = 5 V, Ta = 25°C ** ICC is measured with all outputs open and all possible inputs grounded while achieving the stated output conditions. Switching Characteristics (VCC = 5 V, Ta = 25°C) Item Propagation delay time Output enable time Output disable time Symbol tPLH tPHL tPLH tPHL tZH tZL tHZ tLZ Rev.3.00, Jul.15.2005, page 3 of 5 Inputs Output A, B Y S Y OC Y OC Y min. — — — — — — — — typ. 12 12 14 14 20 20 18 16 max. 18 18 21 21 30 30 30 25 Unit Condition ns ns CL = 15 pF, RL = 2 kΩ ns ns CL = 5 pF, RL = 2 kΩ HD74LS257 Testing Method Test Circuit VCC 4.5V Input P.G. Zout = 50Ω Notes: See Function Table RL OC Output S S1 Y A 5kΩ CL B S2 1. CL includes probe and jig capacitance. 2. All diodes are 1S2074(H). Waveform tTLH tTHL 90% 1.3V Output Control 3V 10% 0V 10% 3V 90% 1.3V 0V tZL 4.5V Waveform 1 S1 closed, S2 open tLZ S1 and, S2 closed 1.3V VOL tZH VOL tHZ 0.5V VOH Waveform 2 S1 open, S2 closed Notes: 1.5V VOH 1.5V 1.3V 0V 0.5V S1 and, S2 closed 1. Input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle = 50% 2. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. 3. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. Rev.3.00, Jul.15.2005, page 4 of 5 HD74LS257 Package Dimensions JEITA Package Code P-DIP16-6.3x19.2-2.54 RENESAS Code PRDP0016AE-B MASS[Typ.] 1.05g Previous Code DP-16FV D 9 E 16 1 8 b3 0.89 Z A1 A Reference Symbol L e Nom θ c e1 D 19.2 E 6.3 JEITA Package Code P-SOP16-5.5x10.06-1.27 RENESAS Code PRSP0016DH-B *1 Previous Code FP-16DAV 7.4 A1 0.51 b p 0.40 b 3 0.48 0.56 1.30 c 0.19 θ 0° e 2.29 0.25 0.31 2.54 2.79 15° 1.12 L 2.54 MASS[Typ.] 0.24g NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. D F 16 20.32 5.06 Z ( Ni/Pd/Au plating ) Max 7.62 1 A bp e Dimension in Millimeters Min 9 c HE *2 E bp Index mark Reference Symbol Terminal cross section ( Ni/Pd/Au plating ) 1 Z *3 bp Nom D 10.06 E 5.50 Max 10.5 A2 8 e Dimension in Millimeters Min x A1 M 0.00 0.10 0.20 0.34 0.40 0.46 0.15 0.20 0.25 7.80 8.00 A L1 2.20 bp b1 c A c A1 θ y L Detail F 1 θ 0° HE 7.50 e 1.27 x 0.12 y 0.15 0.80 Z L L Rev.3.00, Jul.15.2005, page 5 of 5 8° 0.50 1 0.70 1.15 0.90 Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Keep safety first in your circuit designs! 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. 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