HD74AC4514 4-bit Latch/4-to-16-Line Decoder Description This device presents a 4 to 16 line decoder with latched inputs. The HD74AC4514 presents a high level at the selected output. This device consists of four storage latches with common strobe and inhibit (G) inputs. When a low signal is applied to the strobe input, the input data is stored, decoded, and presented to the output. When strobe is high, all sixteen HD74HC4514 outputs are at a low logic level. Feature • Outputs Source/Sink 24 mA HD74AC4514 Pin Arrangement Strobe 1 24 VCC Data1 2 23 Inhibit Data2 3 22 Data4 S7 4 21 Data3 S6 5 20 S10 S5 6 19 S11 S4 7 18 S8 S3 8 17 S9 S2 9 16 S14 S1 10 15 S15 S0 11 14 S12 GND 12 13 S13 (Top view) Logic Symbol Data 1 Data 2 Data 3 Data 4 2 A 2 B 3 21 22 Strobe 1 Inhibit 23 Latch C D S0 S1 S2 S3 S4 S5 S6 4 to 16 S7 Decoder S8 S9 S10 S11 S12 S13 S14 S15 11 9 10 8 7 6 5 4 18 17 20 19 14 13 16 15 HD74AC4514 Pin Names D1 to D4 Strobe Data1 to 4 S 0 to S15 Inhibit Data Inputs Data Strobe Input Data Inputs Outputs Data Enable Input Function Table (Strobe = High) Data Inputs Inhibit D C B A Select Outputs L L L L L S0 L L L L H S1 L L L H L S2 L L L H H S3 L L H L L S4 L L H L H S5 L L H H L S6 L L H H H S7 L H L L L S8 L H L L H S9 L H L H L S10 L H L H H S11 L H H L L S12 L H H L H S13 L H H H L S14 L H H H H S15 H X X X X All output “L” 3 HD74AC4514 Logic Diagram S0 S1 S2 S3 Data 1 Data 2 D Q LE Q D Q LE Q S4 S5 S6 S7 Data 3 Data 4 D Q LE Q D Q LE Q S8 S9 S10 S11 Strobe S12 S13 S14 S15 INH DC Characteristics (unless otherwise specified) Item Symbol Max Unit Condition Maximum quiescent supply current I CC 80 µA VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case Maximum quiescent supply current I CC 8.0 µA VIN = VCC or ground, VCC = 5.5 V, Ta = 25°C 4 HD74AC4514 AC Characteristics: HD74AC4514 Ta = +25°C CL = 50 pF Ta = –40°C to +85°C CL = 50 pF Item Symbol VCC (V)*1 Min Typ Max Min Max Unit Propagation delay t PLH 3.3 1.0 12.0 15.5 1.0 17.0 ns 5.0 1.0 9.0 11.0 1.0 12.0 3.3 1.0 12.5 15.5 1.0 17.0 5.0 1.0 9.0 11.0 1.0 12.0 3.3 1.0 9.5 15.0 1.0 16.0 5.0 1.0 7.0 10.5 1.0 11.5 3.3 1.0 9.0 15.0 1.0 16.5 5.0 1.0 6.5 10.5 1.0 11.5 3.3 1.0 14.0 19.0 1.0 21.0 5.0 1.0 10.0 13.5 1.0 15.0 3.3 1.0 14.5 19.0 1.0 21.0 5.0 1.0 10.5 13.5 1.0 15.0 Dn to On Propagation delay t PHL Dn to On Propagation delay t PLH OE to On Propagation delay t PHL OE to On Propagation delay t PLH LE to On Propagation delay t PHL LE to On Note: ns ns ns ns ns 1. Voltage Range 3.3 is 3.3 V ± 0.3 V Voltage Range 5.0 is 5.0 V ± 0.5 V AC Operating Requirements: HD74AC4514 Ta = –40°C to +85°C CL = 50 pF Ta = +25°C CL = 50 pF Item Symbol VCC (V)*1 Typ Guaranteed Minimum Unit Setup time, HIGH or LOW t su 3.3 1.5 3.5 4.0 ns 5.0 1.0 3.0 3.5 3.3 –1.0 2.5 3.0 5.0 –0.5 1.5 2.0 3.3 3.0 5.5 7.0 5.0 3.0 4.5 5.0 Dn to Strobe Hold time, HIGH or LOW th Dn to Strobe Pulse width, HIGH Note: tw ns ns 1. Voltage Range 3.3 is 3.3 V ± 0.3 V Voltage Range 5.0 is 5.0 V ± 0.5 V 5 HD74AC4514 Capacitance Item Symbol Typ Unit Condition Input capacitance CIN 4.5 pF VCC = 5.5 V Power dissipation capacitance CPD 10.0 pF VCC = 5.0 V 6 Unit: mm 30.4 31.75 Max 13 6.6 7.0 Max 24 12 1.3 2.54 ± 0.25 7.62 5.08 Max 1.90 Max 0.48 ± 0.10 2.54 Min 0.88 0.51 Min 1 + 0.11 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Weight (reference value) DP-24N — Conforms 1.84 g Cautions 1. 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