HD74HC4515 4-bit Latch/4-to-16-line Decoder Description This device presents 4-to-16 line decoder with latched inputs. The HD74HC4515 presents a low 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 inhibit is high, all HD74HC4515 outputs are a high logic level. Features • • • • • High Speed Operation: tpd (Data to S) = 20 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) HD74HC4515 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 “H” 2 HD74HC4515 Pin Arrangement Strobe 1 24 VCC Data 1 2 23 Inhibit Data 2 3 22 Data 4 S7 4 21 Data 3 Latch B A D C S6 5 20 S10 S5 6 19 S11 S4 7 18 S8 S3 8 17 S9 S1 9 16 S14 S2 10 15 S15 S0 11 14 S12 GND 12 13 S13 4 to 16 Decoder (Top view) 3 HD74HC4515 Logic Diagram S0 S1 S2 D1 IN Q S Q S3 S4 S5 D2 S6 S7 S8 D3 S9 S10 D4 S11 S12 S13 Inhibit S14 S15 Strobe 4 HD74HC4515 DC Characteristics Ta = –40 to +85°C Ta = 25°C Item Symbol VCC (V) Min Typ Max Min Max Unit Input voltage VIH 2.0 1.5 — — 1.5 — V 4.5 3.15 — — 3.15 — 6.0 4.2 — — 4.2 — 2.0 — — 0.5 — 0.5 4.5 — — 1.35 — 1.35 6.0 — — 1.8 — 1.8 2.0 1.9 2.0 — 1.9 — 4.5 4.4 4.5 — 4.4 — 6.0 5.9 6.0 — 5.9 — 4.5 4.18 — — 4.13 — I OH = –4 mA 6.0 5.68 — — 5.63 — I OH = –5.2 mA 2.0 — 0.0 0.1 — 0.1 4.5 — 0.0 0.1 — 0.1 6.0 — 0.0 0.1 — 0.1 4.5 — — 0.26 — 0.33 I OL = 4 mA 6.0 — — 0.26 — 0.33 I OL = 5.2 mA VIL Output voltage VOH VOL Test Conditions V V V Vin = VIH or VIL I OH = –20 µA Vin = VIH or VIL I OL = 20 µA Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND Quiescent supply current I CC 6.0 — — 4.0 40 µA Vin = VCC or GND, Iout = 0 µA — 5 HD74HC4515 AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Ta = –40 to +85°C Ta = 25°C VCC (V) Min Typ Max Min Max Unit Test Conditions Propagation delay t PLH 2.0 — — 225 — 280 ns Data to output time 4.5 — 20 45 — 56 6.0 — — 38 — 48 t PLH 2.0 — — 230 — 290 ns Strobe to output t PHL 4.5 — 21 46 — 58 6.0 — — 39 — 49 t PLH 2.0 — — 175 — 220 ns Inhibit to output t PHL 4.5 — 15 35 — 44 6.0 — — 30 — 37 2.0 80 — — 100 — ns Strobe 4.5 16 5 — 20 — 6.0 14 — — 17 — 2.0 100 — — 125 — ns Data to Strobe 4.5 20 1 — 25 — 6.0 17 — — 21 — 2.0 5 — — 5 — ns Strobe to Data 4.5 5 –1 — 5 — 6.0 5 — — 5 — Item Pulse width Setup time Hold time Symbol t PHL tw t su th Output rise/fall t TLH 2.0 — — 75 — 95 time t THL 4.5 — 5 15 — 19 6.0 — — 13 — 16 — — 5 10 — 10 Input capacitance 6 Cin ns pF Unit: mm 13 13.4 15.0 Max 24 31.6 32.5 Max 12 1.2 15.24 0.48 ± 0.10 0.51 Min 2.54 ± 0.25 5.70 Max 2.13 Max 2.54 Min 1 + 0.11 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Weight (reference value) DP-24 Conforms Conforms 3.1 g Cautions 1. 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