# SN74LS390, SN54LS390, SN74LS393, SN54LS393: Dual 4-Bit Decade and Binary Counters
## Overview
These are dual 4-bit decade and binary counters designed for various counting applications.
## Key Features
️· Types: SN54LS390, SN54LS393, SN74LS390, SN74LS393, SN54390, SN54393, SN74390
️· Function: Dual 4-bit decade and binary counters
️· Packaging: Available in various packages including SO, NS, D, and LCCC. Tape and reel options available.
️· Environmental Considerations: Pb-Free (RoHS) and Green (RoHS & no Sb/Br) options available.
️· Quality/Reliability: Military and space-qualified versions are available.
## Packaging Details
️· SPQ: 2000 - 2500 parts per reel
️· Reel Diameter: 330.0 mm
️· Reel Width: 16.4 mm - 367.0 mm
️· Pin 1 Quadrant: Q1
## Important Notes
️· Production processing doesn't necessarily include testing of all parameters.
️· TI provides a warranty based on the specifications at the time of sale.
️· Detailed packaging information, quality levels, and application notes are available on the TI website.