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Original sales spot supply SN54S169J Counter IC Binary Counter 1 Element 4 Bit Positive Edge 16-CDIP

Manufacturer
TI
Manufacturer Product Number
SN54S169J
Description

Counter IC Binary Counter 1 Element 4 Bit Positive Edge 16-CDIP

Package Condition
TUBE

Product Description

These synchronous presettable counters feature an internal carry look-ahead for cascading in high speed counting applications. The 'LS169B and 'S169 are 4-bit binary counters.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 inputs and internal gating. This mode of operation helps eliminate the output counting spikes that are normally associated with asynchronous(ripple-clock) counters. A buffered clock input triggers the four master-slave flip-flops on the rising (positive-going) edge of the clock waveform.

These counters are fully programmable; that is the outputs may each be preset to either level. The load input circuitry allows loading with the carry-enable output of cascaded counters.As loading is synchronous, setting up a low level at the load input disabies the counter and causes the outputs to agree with the data inputs after the next clock pulse.

​The carry look-ahead circuitry provides for cascading counters for n-bit synchronous applications without additional gating Instrumental in accomplishing this function are two count-enable inputs and a carry output. Both count enable inputs (ENPEN'T) must be low to count. The direction of the count is determined by the level of the up/down input, When the input is high, the counter counts up; when low, it counts down. input ENT is fed forward to enable the carry output.The carry output thus enabled will produce a low-level output pulse with a duration approximately equal to the high portion of the QA output when counting up and approximately equal to the low portion of the QA output when counting down. This low-level overflow carry pulse can be used to enable successive cascaded stages. Transitions at the ENP or ENT inputs are allowed regardless of the level of the clock input. All inputs are diode-clamped to minimize transmission-Line effects, thereby simplify.ing system design.

Product Features

✹Programmable Look-Ahead Up/Down Binary Counters

✹Fully Synchronous Operation for Countingand Programming

✹Internal Look-Ahead for Fast Counting

✹Carry Output for n-Bit Cascading

✹Fully Independent Clock Circuit

Specifications

AttributeAttribute value
ANSM-Part# ANSM-SN54S169J
Category Integrated Circuits (ICs)
Logic
Counters, Dividers
Mfr Texas Instruments
Series 54S
Package Tube
Product Status Active
Logic Type Binary Counter
Direction Up, Down
Number of Elements 1
Number of Bits per Element 4
Reset Synchronous
Timing Synchronous
Count Rate 70 MHz
Trigger Type Positive Edge
Voltage - Supply 4.5 V ~ 5.5 V
Operating Temperature -55°C ~ 125°C (TA)
Mounting Type Through Hole
Package / Case 16-CDIP (0.300", 7.62mm)
Supplier Device Package 16-CDIP

Actual image of the product 

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Original sales spot supply SN54S169J Counter IC Binary Counter 1 Element 4 Bit Positive Edge 16-CDIP

Counter IC Binary Counter 1 Element 4 Bit Positive Edge 16-CDIP

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