HD74HC238 3-to-8-line Decoder/Demultiplexer REJ03D0593–0200 (Previous ADE-205-470) Rev.2.00 Jan 31, 2006 Description The HD74HC238 has 3 binary select inputs (A, B and C). If the device is enabled these inputs determine 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 (Data to Y) = 15 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 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 Package Code (Previous Code) Package Type Package Abbreviation Taping Abbreviation (Quantity) HD74HC238P DILP-16 pin PRDP0016AE-B (DP-16FV) P — HD74HC238FPEL 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. HD74HC238RPEL SOP-16 pin (JEDEC) EL (2,500 pcs/reel) Function Table Inputs G1 X X L H H H H H H H H H: L: X: Enable G2A G2B X H H X X X L L L L L L L L L L L L L L L L High level Low level Irrelevant C X X X L L L L H H H H Select B X X X L L H H L L H H Rev.2.00 Jan 31, 2006 page 1 of 6 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 HD74HC238 Pin Arrangement Select Inputs A 1 B 2 B C 3 G2A 16 VCC A 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 Enable Inputs Y0 Output Y6 Outputs 9 Y6 (Top view) Logic Diagram G1 G2B Y0 G2A A B Y1 Y2 Y3 C Y4 Y5 Y6 Y7 Rev.2.00 Jan 31, 2006 page 2 of 6 HD74HC238 Absolute Maximum Ratings Item Supply voltage range Input / Output voltage Input / Output diode current Output current VCC, GND current Power dissipation Storage temperature Symbol VCC VIN, VOUT IIK, IOK IO ICC or IGND PT Tstg Ratings –0.5 to 7.0 –0.5 to VCC +0.5 ±20 ±35 ±75 500 –65 to +150 Unit V V 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. Recommended Operating Conditions Item Supply voltage Input / Output voltage Operating temperature Input rise / fall time*1 Symbol VCC VIN, VOUT Ta tr, tf Ratings 2 to 6 0 to VCC –40 to 85 0 to 1000 0 to 500 0 to 400 Unit V V °C ns Conditions VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V Notes: 1. This item guarantees maximum limit when one input switches. Waveform: Refer to test circuit of switching characteristics. Electrical Characteristics Item Input voltage Symbol VCC (V) VIH VIL Output voltage VOH VOL Off-state output current Input current IOZ Quiescent supply current ICC Iin Min Ta = 25°C Typ Max Ta = –40 to+85°C Unit Min Max 2.0 4.5 6.0 2.0 4.5 1.5 3.15 4.2 — — — — — — — — — — 0.5 1.35 1.5 3.15 4.2 — — — — — 0.5 1.35 6.0 2.0 4.5 6.0 4.5 6.0 — 1.9 4.4 5.9 4.18 5.68 — 2.0 4.5 6.0 — — 1.8 — — — — — — 1.9 4.4 5.9 4.13 5.63 1.8 — — — — — 2.0 4.5 6.0 4.5 6.0 6.0 — — — — — — 0.0 0.0 0.0 — — — 0.1 0.1 0.1 0.26 0.26 ±0.5 — — — — — — 0.1 0.1 0.1 0.33 0.33 ±5.0 6.0 6.0 — — — — ±0.1 4.0 — — ±1.0 40 Rev.2.00 Jan 31, 2006 page 3 of 6 Test Conditions V V V Vin = VIH or VIL IOH = –20 µA IOH = –4 mA IOH = –5.2 mA V Vin = VIH or VIL IOL = 20 µA IOL = 4 mA IOL = 5.2 mA µA Vin = VIH or VIL, Vout = VCC or GND µA Vin = VCC or GND µA Vin = VCC or GND, Iout = 0 µA HD74HC238 Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Item Symbol VCC (V) Propagation delay time tPLH tPHL Output rise/fall time tTLH tTHL Input capacitance Cin 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 — Ta = 25°C Min Typ Max — — 150 — 15 30 — — 26 — — 150 — 13 30 — — 26 — — 75 — 5 15 — — 13 — 5 10 Ta = –40 to +85°C Unit Test Conditions Min Max — 190 ns Select to Y — 38 — 33 ns Enable to Y — 190 — 38 — 33 — 95 ns — 19 — 16 — 10 pF Test Circuit Measurement point CL* Note: CL includes the probe and fig capacitance. Waveforms tr tf 90 % 50 % Input 10 % 10 % t PLH 0V t PHL 90 % Same-phase output VCC 90 % 50 % VOH 90 % 50 % 10 % t PHL 50 % 10 % t TLH t PLH t THL 90 % 90 % Inverse-phase output 50 % 10 % t THL VOL 50 % 10 % VOH VOL t TLH 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 Jan 31, 2006 page 4 of 6 HD74HC238 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.2.00 Jan 31, 2006 page 5 of 6 8° 0.50 1 0.70 1.15 0.90 HD74HC238 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 e 1.27 x 0.25 y 0.15 0.635 Z 0.40 L L Rev.2.00 Jan 31, 2006 page 6 of 6 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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