HD74HCT238 3-to-8-line Decoder/Demultiplexer REJ03D0661–0200 (Previous ADE-205-549) Rev.2.00 Mar 30, 2006 Description The HD74HCT238 has 3 binary select inputs (A, B, and C). If the device is enabled these inputs determined which one of the eight normally high outputs will go low. Two active low and one active high enables (G1, G2A and G2B) are provided to ease the cascading of decoders. Features • • • • • • High Speed Operation: tpd (A, B, C to Y) = 16.5 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 V to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Ordering Information Part Name HD74HCT238FPEL Package Code (Previous Code) Package Type PRSP0016 DH-B (FP-16DAV) SOP-16 pin (JEITA) Package Abbreviation Taping Abbreviation (Quantity) FP EL (2,000 pcs/reel) PRSP0016 DG-A RP (FP-16DNV) Note: Please consult the sales office for the above package availability. HD74HCT238RPEL SOP-16 pin (JEDEC) EL (2,500 pcs/reel) Function Table G1 X X L H H H H H H H H H: L: X: Inputs Enable G2A G2B C X H X H X X X X X L L L L L L L L L L L L L L H L L H L L H L L H High level Low level Irrelevant Select B X X X L L H H L L H H Rev.2.00 Mar 30, 2006 page 1 of 5 Outputs A X X X L H L H L H L H Y0 L L L H L L L L L L L Y1 L L L L H L L L L L L Y2 L L L L L H L L L L L Y3 L L L L L L H L L L L Y4 L L L L L L L H L L L Y5 L L L L L L L L H L L Y6 L L L L L L L L L H L Y7 L L L L L L L L L L H HD74HCT238 Pin Arrangement 1 B 2 B C 3 G2A Select Inputs Enable Inputs Outputs 16 VCC A A Y0 15 Y0 C Y1 14 Y1 4 G2A Y2 13 Y2 G2B 5 G2B Y3 12 Y3 G1 6 G1 Y4 11 Y4 Y7 7 Y7 Y5 10 Y5 GND 8 Y6 9 Outputs Y6 (Top view) Logic Diagram G1 G2B Y0 G2A Y1 A Y2 Y3 B Y4 C Y5 Y6 Y7 Absolute Maximum Ratings Item Supply voltage range Input voltage Output voltage Output current DC current drain per VCC, GND DC input diode current DC output diode current Power dissipation per package Storage temperature Symbol VCC VIN VOUT IOUT ICC, IGND IIK IOK PT Tstg Rating –0.5 to +7.0 –0.5 to VCC + 0.5 –0.5 to VCC + 0.5 ±25 ±50 ±20 ±20 500 –65 to +150 Unit V V V mA mA mA mA mW °C Note: The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of which may be realized at the same time. Rev.2.00 Mar 30, 2006 page 2 of 5 HD74HCT238 Recommended Operating Conditions Item Supply voltage Input / Output voltage Operating temperature Input rise / fall time*1 Symbol VCC VIN, VOUT Ta tr, tf Ratings 4.5 to 5.5 0 to VCC –40 to 85 0 to 500 Unit V V °C ns Conditions VCC = 4.5 V Notes: 1. This item guarantees maximum limit when one input switches. Waveform: Refer to test circuit of switching characteristics. Electrical Characteristics Item Symbol VCC (V) VIH VIL VOH 4.5 to 5.5 4.5 to 5.5 4.5 4.5 4.5 4.5 Input voltage Output voltage VOL Min 2.0 — 4.4 4.18 — — Ta = 25°C Typ Max — — — 0.8 — — — — — 0.1 — 0.26 Ta = –40 to+85°C Min Max 2.0 — — 0.8 4.4 — 4.13 — — 0.1 — 0.33 Unit V V V V Test Conditions Vin = VIH or VIL IOH = –20 µA IOH = –4 mA Vin = VIH or VIL IOL = 20 µA IOL = 4 mA Input current Iin 5.5 — — ±0.1 — ±1.0 µA Vin = VCC or GND Quiescent supply current ICC 5.5 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Item Propagation delay time Output rise/fall time Input capacitance Symbol VCC (V) Ta = 25°C Ta = –40 to +85°C Min Typ Max Min Max — 18 30 — 38 — 19 30 — 38 — 17 30 — 38 — 17 30 — 39 — 17 30 — 38 — 17 30 — 38 — 17 30 — 38 — 17 30 — 38 Unit tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 tTLH tTHL Cin 4.5 — 5 15 — 19 ns — — 5 10 — 10 pF Rev.2.00 Mar 30, 2006 page 3 of 5 Test Conditions ns A, B or C to Y ns G2A to Y ns G2B to Y ns G1 to Y HD74HCT238 Test Circuit VCC VCC Output A Input See Function Table B Pulse Generator Zout = 50 Ω Input Pulse Generator Zout = 50 Ω Y0 C CL = 50 pF G1 Output G2A Y7 G2B CL = 50 pF Note : 1. CL includes probe and jig capacitance. Waveforms tr tf 90 % 1.3 V Input 10 % 10 % tPLH 0V tPHL 90 % Same-phase output VCC 90 % 1.3 V VOH 90 % 1.3 V 10 % tPHL 1.3 V 10 % tTLH tPLH tTHL 90 % 90 % Inverse-phase output 1.3 V 10 % tTHL VOL 1.3 V 10 % VOH VOL tTLH Notes: 1. Input waveform: PRR ≤ 1 MHz, Zo = 50 Ω, tr ≤ 6 ns, tf ≤ 6 ns 2. The output are measured one at a time with one transition per measurement. Rev.2.00 Mar 30, 2006 page 4 of 5 HD74HCT238 Package Dimensions JEITA Package Code P-SOP16-5.5x10.06-1.27 RENESAS Code PRSP0016DH-B *1 Previous Code FP-16DAV MASS[Typ.] 0.24g D F 16 NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. 9 *2 c E HE bp Index mark Terminal cross section ( Ni/Pd/Au plating ) 1 8 e Z *3 bp x Reference Dimension in Millimeters Symbol M A L1 θ A1 y L Detail F JEITA Package Code P-SOP16-3.95x9.9-1.27 RENESAS Code PRSP0016DG-A *1 Previous Code FP-16DNV D E A2 A1 A bp b1 c c1 θ HE e x y Z L L1 Min Nom Max 10.06 10.5 5.50 0.00 0.10 0.20 2.20 0.34 0.40 0.46 0.15 0.20 0.25 0° 8° 7.50 7.80 8.00 1.27 0.12 0.15 0.80 0.50 0.70 0.90 1.15 MASS[Typ.] 0.15g D F 16 NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. 9 c *2 Index mark HE E bp Terminal cross section ( Ni/Pd/Au plating ) 1 Z Reference Dimension in Millimeters Symbol 8 e *3 bp x M A L1 A1 θ L y Detail F Rev.2.00 Mar 30, 2006 page 5 of 5 D E A2 A1 A bp b1 c c1 θ HE e x y Z L L1 Min Nom Max 9.90 10.30 3.95 0.10 0.14 0.25 1.75 0.34 0.40 0.46 0.15 0.20 0.25 0° 8° 5.80 6.10 6.20 1.27 0.25 0.15 0.635 0.40 0.60 1.27 1.08 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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