HD74HC4514
4-bit Latch/4-to-16-line Decoder
Description
This device presents a 4-to-16 line decoder with latched in put...
HD74HC4514
4-bit Latch/4-to-16-line Decoder
Description
This device presents a 4-to-16 line decoder with latched in puts. The HD74HC4514 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.
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)
HD74HC4514
Function Table (Strobe = High)
Data Inputs Inhibit L L L L L L L L L L L L L L L L H D L L L L L L L L H H H H H H H H X C L L L L H H H H L L L L H H H H X B L L H H L L H H L L H H L L H H X A L H L H L H L H L H L H L H L H X Select Outputs S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 All output “L”
2
HD74HC4514
Pin Arrangement
Strobe Data 1 Data 2 S7 S6 S5 S4 S3 S1
1 2 3 4 B A D C 5 6 7 8 9 4 to 16 Decoder Latch
24 23 22 21 20 19 18 17 16 15 14 13 (Top view)
VCC Inhibit Data 4 Data 3 S10 S11 S8 S9 S14 S15 S12 S13
S2 10 S0 11 GND 12
3
HD74HC4514
Logic Diagram
S0 S1 S2 S3 Data 1
Q Q
D LE
S4 S5
Data 2
D LE
Q Q
S6 S7
Data 3
D LE
Q Q
S8 S9
Data 4
D LE
Q Q
S10 S11
Strobe S12 S13 S14 S15 INH
4
HD74HC4514
DC Characterist...