Product Details
| DUAL DECADE COUNTER; DUAL 4-STAGE BINARY COUNTER 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. • 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 |
Product Description
| TYPE | DESCRIPTION |
| ANSC PART# | ANSC - SN54LS390J |
| Category | Integrated Circuits (ICs) |
| Logic | |
| Counters, Dividers | |
| Manufacturer | / |
| Series | 54LS |
| Packaging | Tube |
| Part Status | Active |
| Logic Type | Counter, Decade |
| Direction | Up |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Reset | Asynchronous |
| Timing | - |
| Count Rate | 35 MHz |
| Trigger Type | Negative 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 |
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