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74173 Folha de dados(PDF) 1 Page - Hitachi Semiconductor |
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74173 Folha de dados(HTML) 1 Page - Hitachi Semiconductor |
1 / 9 page HD74HC173 4-bit D-type Register (with 3-state Outputs) Description The four D type Flip-Flops operate synchronously from a common clock. The 3-state outputs allow the device to be used in bus organized systems. The outputs are placed in the 3-stage mode when either of the output disable pins are in the logic high level. The input disable allows the flip-flops to remain in their present states without having to disrupt the clock. If either of the 2 input disables are taken to a logic high level, the Q outputs are fed back to the inputs, forcing the flip-flops to remain in the same state. Clearing is enabled by taking the clear input to a logic high level. The data outputs change state on the positive going edge of the clock. Features • High Speed Operation: t pd (Clock to Q) = 14 ns typ (CL = 50 pF) • High Output Current: Fanout of 10 LSTTL Loads • Wide Operating Voltage: V CC = 2 to 6 V • Low Input Current: 1 µA max • Low Quiescent Supply Current: I CC (static) = 4 µA max (Ta = 25°C) Function Table Inputs Data Enable Clear Clock G 1 G 2 Data D Output Q H X X XXL L L X XXQ 0 L H XXQ 0 L XH X Q 0 L L LLL L LL H H Note: When either M or N (or both) is (are) high the output is disabled to the high-impedance state; however sequential operation of the flip-flops is not affected. |
Nº de peça semelhante - 74173 |
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Descrição semelhante - 74173 |
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