12 000 ₫
Thông Tin :
Presettable synchronous 4-bit binary up/down counter
General description
The 74HC193 and 74HCT193 are high-speed Si-gate CMOS devices and are pin
compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with
JEDEC standard no. 7A.
The 74HC193 and 74HCT193 are 4-bit synchronous binary up/down counters.Separate
up/downclocks,CPUandCPDrespectively,simplifyoperation.Theoutputschangestate
synchronously with the LOW-to-HIGH transition of either clock input. If the CPUclock is
pulsed while CPDis held HIGH, the device will count up. If the CPDclock is pulsed while
CPUis held HIGH, the device will count down. Only one clock input can be held HIGH at
any time, or erroneous operation will result. The device can be cleared at any time by the
asynchronous master reset input (MR); it may also be loaded in parallel by activating the
asynchronous parallel load input (PL).
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