1/5/10Pcs TI National Semi MM74C163N Binary Counter w/ Synchronous Clear PDIP-16

Description

1/5/10pcs TI National Semi MM74C163N 4-Bit Binary Counter w/ Synchronous Clear PDIP-16
This synchronous, presettable, 4-bit binary counter has internal carry look-ahead circuitry for use in high-speed counting designs. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable (ENP, ENT) inputs and internal gating. This mode of operation eliminates the output counting spikes that normally are associated with asynchronous (ripple-clock) counters. However, counting spikes can occur on the ripple-carry (RCO) output. A buffered clock (CLK) input triggers the four flip-flops on the rising (positive-going) edge of CLK. This counter is fully programmable. That is, it can be preset to any number between 0 and 15. Because presetting is synchronous, a low logic level at the load (LOAD\) input disables the counter and causes the outputs to agree with the setup data after the next clock pulse, regardless of the levels of ENP and ENT. The clear function is synchronous, and a low logic level at the clear (CLR\) input sets all four of the flip-flop outputs to low after the next low-to-high transition of the clock, regardless of the levels of ENP and ENT. This synchronous clear allows the count length to be modified easily by decoding the Q outputs for the maximum count desired. The active-low output of the gate used for decoding is connected to the clear input to synchronously clear the counter to 0000 (LLLL). The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications, without additional gating. This function is implemented by the ENP and ENT inputs and an RCO output. Both ENP and ENT must be high to count, and ENT is fed forward to enable RCO. RCO, thus enabled, produces a high-logic-level pulse while the count is 15 (HHHH). The high-logic-level overflow ripple-carry pulse can be used to enable successive cascaded stages. Transitions at ENP or ENT are allowed, regardless of the level of CLK. The MM74C163N features a fully independent clock circuit. Changes at ENP, ENT, or LOAD\ that modify the operating mode have no effect on the contents of the counter until clocking occurs. The function of the counter (whether enabled, disabled, loading, or counting) is dictated solely by the conditions meeting the setup and hold times.
SPECIFICATIONS
Manufacturer: Texas Instruments / National Semiconductor
Part Number: MM74C163N / SN74F163AN
Product Category: Counter ICs
Mounting Style: Through Hole
Package / Case: PDIP-16
Counter Type: Binary
Number of Bits: 4 bit
Counting Sequence: Up
Operating Supply Voltage: 4.5 V to 5.5 V
Minimum Operating Temperature: 0 C
Maximum Operating Temperature: + 70 C
Series: SN74F163A
Function: Counter
Operating Temperature Range: 0 C to + 70 C
Output Current: 20 ma/- 1 mA
Product Type: Counter ICs
FEATURES
Internal Look-Ahead Circuitry for Fast Counting
Carry Output for N-Bit Cascading
Fully Synchronous Operation for Counting
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