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HD74HC138 Dataheets PDF



Part Number HD74HC138
Manufacturers Renesas
Logo Renesas
Description 3-to-8-line Decoder/Demultiplexer
Datasheet HD74HC138 DatasheetHD74HC138 Datasheet (PDF)

HD74HC138 3-to-8-line Decoder/Demultiplexer with Address Latch REJ03D0570-0300 Rev.3.00 Mar 25, 2009 Description The HD74HC138 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 (A, B, C to Y) = 16.5 ns typ (CL = 50 pF) • High Output Current: Fanout of 10.

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HD74HC138 3-to-8-line Decoder/Demultiplexer with Address Latch REJ03D0570-0300 Rev.3.00 Mar 25, 2009 Description The HD74HC138 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 (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 Package Type Package Code (Previous Code) HD74HC138P DILP-16 pin PRDP0016AE-B (DP-16FV) HD74HC138FPEL SOP-16 pin (JEITA) PRSP0016DH-B (FP-16DAV) HD74HC138RPEL SOP-16 pin (JEDEC) PRSP0016DG-A (FP-16DNV) HD74HC138TELL TSSOP-16 pin PTSP00016JB-A (TTP-16DAV) Note: Please consult the sales office for the above package availability. Package Abbreviation P FP RP T Taping Abbreviation (Quantity) — EL (2,000 pcs/reel) EL (2,500 pcs/reel) ELL (2,000 pcs/reel) REJ03D0570-0300 Rev.3.00 Mar 25, 2009 Page 1 of 7 HD74HC138 Function Table Inputs Enable Select Outputs G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 XXHXXXHHHHHHHH XHXXXXHHHHHHHH L XXXXXHHHHHHHH HL L L L L LHHHHHHH HL L L LHHLHHHHHH HL L LHLHHLHHHHH HL L LHHHHHLHHHH HL LHL LHHHHLHHH HL LHLHHHHHHLHH HL LHHL HHHHHHLH HL LHHHHHHHHHHL H : High level L : Low level X : Irrelevant Pin Arrangement A1 Select Inputs B2 C3 Enable Inputs G2A 4 G2B 5 G1 6 Output Y7 7 GND 8 A B Y0 C Y1 G2A Y2 G2B G1 Y3 Y4 Y7 Y5 Y6 (Top view) 16 VCC 15 Y0 14 Y1 13 Y2 12 Y3 Outputs 11 Y4 10 Y5 9 Y6 Absolute Maximum Ratings Item Symbol Rating Unit 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 VCC VIN VOUT IOUT ICC, IGND IIK IOK PT Tstg –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 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. REJ03D0570-0300 Rev.3.00 Mar 25, 2009 Page 2 of 7 HD74HC138 Recommended Operating Conditions Item Symbol Ratings Supply voltage Input / Output voltage Operating temperature VCC VIN, VOUT Ta 2 to 6 0 to VCC –40 to 85 Input rise / fall time*1 0 to 1000 tr, tf 0 to 500 0 to 400 Note: 1. This item guarantees maximum limit when one input switches. Waveform: Refer to test circuit of switching characteristics. Unit V V °C ns Conditions VCC = 2.0 V VCC = 4.5 V VCC = 6.0 V Electrical Characteristics Item Input voltage Output voltage Input current Quiescent supply current Symbol VIH VIL VOH VOL Iin VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 4.5 6.0 2.0 4.5 6.0 4.5 6.0 6.0 Ta = 25°C Min Typ Max 1.5 — — 3.15 — — 4.2 — — — — 0.5 — — 1.35 — — 1.8 1.9 2.0 — 4.4 4.5 — 5.9 6.0 — 4.18 — — 5.68 — — — 0.0 0.1 — 0.0 0.1 — 0.0 0.1 — — 0.26 — — 0.26 — — ±0.1 Ta = –40 to+85°C Unit Min Max Test Conditions 1.5 — 3.15 — V 4.2 — — 0.5 — 1.35 V — 1.8 1.9 — 4.4 — IOH = –20 µA 5.9 — V Vin = VIH or VIL 4.13 — IOH = –4 mA 5.63 — IOH = –5.2 mA — 0.1 — 0.1 IOL = 20 µA — 0.1 V Vin = VIH or VIL — 0.33 IOL = 4 mA — 0.33 IOL = 5.2 mA — ±1.0 µA Vin = VCC or GND ICC 6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA REJ03D0570-0300 Rev.3.00 Mar 25, 2009 Page 3 of 7 HD74HC138 Switching Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Item Propagation delay time Output rise/fall time Input capacitance Symbol VCC (V) tPHL tPLH tPHL tPLH tPHL tPLH tTLH, tTHL Cin 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 — Ta = 25°C Ta = –40 to +85°C Unit Min Typ Max Min Max Test Conditions — — 175 — 220 — 17 35 — 44 ns — — 30 — — 150 — — 37 190 A, B or C to Y — 16 30 — 38 ns — — 26 — 33 — — 150 — 190 — 16 30 — 38 ns — — 26 — — 150 — — 33 190 G1 to Y — 17 30 — 38 ns — — 26 — 33 — — 175 — 220 — 15 35 — 44 ns — — 30 — — 150 — — 37 190 G2A or G2B to Y — 17 30 — 38 ns — — 26 — 33 — — 75 — 90 — 5 15 — 19 ns — — 13 — 16 — 5 10 — 10 pF Test Circuit Measurement point CL* Note: CL includes the probe and fig capacitance. REJ03D0570-0300 Rev.3.00 Mar 25, 2009 Page 4 of 7 HD74HC138 Waveforms Input tr 10 % 90 % 50 % tPLH tf 90 % 50 % 10 % tPHL Same-phase output 50 % 10 % 90 % tPHL tTLH 90 % 50 % 10 % tPLH tTHL VCC 0V VOH VOL Inverse-phase output 90 % 50 % 10 % 50 % 10 % 90 % VOH VOL tTHL 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. REJ03D0570-0300 Rev.3.00 Mar 25, 2009 Page 5 of 7 HD74HC138 Package D.


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