HD74LS138 3-Line-to-8-Line Decoders / Demultiplexers REJ03D0434–0300 Rev.3.00 Jul.13.2005 The HD74LS138 decodes one-of-eight line dependent on the conditions at the three binaly select inputs and the three enable inputs. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications. Features • Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation Taping Abbreviation (Quantity) HD74LS138P DILP-16 pin PRDP0016AE-B (DP-16FV) P - HD74LS138FPEL SOP-16 pin (JEITA) PRSP0016DH-B (FP-16DAV) FP EL (2,000 pcs/reel) PRSP0016DG-A RP (FP-16DNV) Note: Please consult the sales office for the above package availability. HD74LS138RPEL SOP-16 pin (JEDEC) EL (2,500 pcs/reel) Pin Arrangement A 1 16 VCC A Select Inputs B 2 B Y0 15 Y0 C 3 C Y1 14 Y1 G2A 4 G2A Y2 13 Y2 G2B 5 G2B Y3 12 Y3 G1 6 G1 Y4 11 Y4 Outputs Y7 7 Y7 Y5 10 Y5 GND 8 9 Y6 Enable Inputs Y6 (Top view) Rev.3.00, Jul.13.2005, page 1 of 7 Outputs HD74LS138 Function Table Inputs Enable G1 G2* X H L X H L H L H L H L H L H L H L H L Select B X X L L H H L L H H C X X L L L L H H H H Outputs A X X L H L H L H L H Y0 H H L H H H H H H H Y1 H H H L H H H H H H Y2 H H H H L H H H H H Y3 H H H H H L H H H H Y4 H H H H H H L H H H Y5 H H H H H H H L H H Y6 H H H H H H H H L H Y7 H H H H H H H H H L H ; high level, L ; low level, X ; irrelevant * ; G2 = G2A + G2B Block Diagram Y0 Y1 Enable Inputs G1 Y2 G2A G2B Y3 Data Outputs Y4 Select Inputs A Y5 B Y6 C Y7 Absolute Maximum Ratings Symbol Ratings Unit Supply voltage Item VCC 7 V Input voltage VIN 7 V Power dissipation PT 400 mW Tstg –65 to +150 °C 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.13.2005, page 2 of 7 Symbol Min Typ Max Unit VCC 4.75 5.00 5.25 V IOH — — –400 µA IOL — — 8 mA Topr –20 25 75 °C HD74LS138 Electrical Characteristics (Ta = –20 to +75 °C) Item Input voltage Symbol VIH VIL min. 2.0 — typ.* — — max. — 0.8 Unit V V VOH 2.7 — — V — — — — — — — — — — 0.4 0.5 20 –0.4 0.1 µA mA mA VCC = 5.25 V, VI = 2.7 V VCC = 5.25 V, VI = 0.4 V VCC = 5.25 V, VI = 7 V –20 — –100 mA VCC = 5.25 V — — 6.3 — 10 –1.5 mA V VCC = 5.25 V, Outputs enabled and open VCC = 4.75 V, IIN = –18 mA Output voltage VOL IIH IIL Input current II Short-circuit output IOS current Supply current ICC Input clamp voltage VIK Note: * VCC = 5 V, Ta = 25°C Condition VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V, IOH = –400 µA IOL = 4 mA VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V IOL = 8 mA V Switching Characteristics (VCC = 5 V, Ta = 25°C) Item Symbol Propagation delay time tPLH tPHL tPLH tPLH tPLH tPHL tPLH tPLH Inputs Binary select A, B, C Enable G2A, G2B Enable G1 Rev.3.00, Jul.13.2005, page 3 of 7 Output Levels of delay 2 Y 3 2 Y 3 min. typ. max. Unit — — — — — — 13 27 18 26 12 21 20 41 27 39 18 32 ns ns ns ns ns ns — — 17 25 26 38 ns ns Condition CL = 15 pF, RL = 2 kΩ HD74LS138 Testing Method Test Circuit VCC Output 4.5V RL Load circuit 1 Y0 CL A Input See Testing Table P.G. Zout = 50Ω Output B Y1 C Same as Load Circuit 1. Output Y2 Same as Load Circuit 1. Output G1 G2A Y3 Same as Load Circuit 1. Output G2B Y4 Same as Load Circuit 1. Output Y5 Same as Load Circuit 1. Output Y6 Same as Load Circuit 1. Output Y7 Notes: Same as Load Circuit 1. 1. CL includes probe and jig capacitance. 2. All diodes are 1S2074(H). Waveform tTHL tTLH 90% 1.3 V Input 3V 90% 1.3 V 10% 10% 0V tPHL tPLH VOH In phase Output 1.3 V 1.3 V VOL tPHL tPLH VOH Out of phase Output 1.3 V 1.3 V VOL Note: Input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle 50% Rev.3.00, Jul.13.2005, page 4 of 7 HD74LS138 Relation Between Input and Output to Levels of Delay Outputs Inputs A B C G1 G2A, G2B Y0 Y0 Y0 2 levels of delay Y2 Y4 Y1 Y4 Y1 Y2 Rev.3.00, Jul.13.2005, page 5 of 7 Y0 to Y7 Y6 Y5 Y3 Y1 Y2 Y4 3 levels of delay Y3 Y5 Y3 Y6 Y5 Y6 Y0 to Y7 Y7 Y7 Y7 HD74LS138 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.13.2005, page 6 of 7 8° 0.50 1 0.70 1.15 0.90 HD74LS138 JEITA Package Code P-SOP16-3.95x9.9-1.27 RENESAS Code PRSP0016DG-A *1 Previous Code FP-16DNV MASS[Typ.] 0.15g D NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. F 16 9 c *2 Index mark HE E bp Reference Symbol Terminal cross section ( Ni/Pd/Au plating ) Dimension in Millimeters Min Nom Max D 9.90 10.30 E 3.95 A2 8 1 Z e *3 bp x A1 0.10 0.14 0.25 0.34 0.40 0.46 0.15 0.20 0.25 6.10 6.20 1.75 A M L1 bp b1 c A c A1 θ L y Detail F 1 θ 0° HE 5.80 1.27 e x 0.25 y 0.15 0.635 Z 0.40 L L Rev.3.00, Jul.13.2005, page 7 of 7 8° 1 0.60 1.08 1.27 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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