Home datasheet SN74LS393DE4

SN74LS393DE4

Logic - Counters, Dividers
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Description

The SN54/74LS390 and SN54/74LS393( SN74LS393DE4 ) each contain a pair of high-speed 4-stage ripple counters. Each half of the LS390 is partitioned into a divide-by-two section and a divide-by five section, with a separate clock input for each section. The two sections can be connected to count in the 8.4.2.1 BCD code or they can count in a biquinary sequence to provide a square wave (50% duty cycle) at the final output. Each half of the LS393 operates as a Modulo-16 binary divider, with the last three stages triggered in a ripple fashion. In both the LS390 and the LS393, the flip-flops are triggered by a HIGH-to-LOW transition of their CP inputs. Each half of each circuit type has a Master Reset input which responds to a HIGH signal by forcing all four outputs to the LOW state. SN74LS393DE4 Features • Dual Versions of LS290 and LS293• LS390 has Separate Clocks Allowing ÷2, ÷2.5, ÷5• Individual Asynchronous Clear for Each Counter• Typical Max Count Frequency of 50 MHz• Input Clamp Diodes Minimize High Speed Termination Effects
Features

Parameters

[{"Name":"Number of Elements","Value":"2"},{"Name":"Number of Bits per Element","Value":"4"},{"Name":"Count Rate","Value":"35MHz"},{"Name":"Voltage - Supply","Value":"4.75 V ~ 5.25 V"},{"Name":"Operating Temperature","Value":"0°C ~ 70°C"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

SEIKO INSTRUMENTS

Seiko Instruments Inc. Is a Japanese company which head office is located in 8, Nakase 1-chome, Mihama-ku, Chiba-shi, Chiba 261-8507, Japan . It’s business lines are: Watches Business Watches, Watch Movements Electronic Components Business Quartz crystals, Micro batteries, etc. Precision Mechatronics Business Inkjet printer heads, Hard disk components, Thermal printers, Compact precision components, Machine tools, FA, Musical instrument accessories, Radiation detection and measurement systems, etc.


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