Search
Menu
Special Pages
Login
No picture available
Connect a picture (already uploaded)
Add a new picture

74LS90

Decade and Binary Counters

Other names for this product: DM74LS90,
Courtesy/Thanks to: Fairchild Semiconductor

Description: General Description

Each of these monolithic counters
contains four master-slave flip-flops
and additional gating to provide a
divide-by-two counter and a three-stage
binary counter for which the count cycle
length is divide-by-five for the ’LS90
and divide-by-eight for the ’LS93. All
of these counters have a gated zero
reset and the LS90 also has gated set-
to-nine inputs for use in BCD nine’s
complement applications.

To use their maximum count length
(decade or four bit binary), the B input
is connected to the QA output. The input
count pulses are applied to input A and
the outputs are as described in the
appropriate truth table. A symmetrical
divide-by-ten count can be obtained from
the ’LS90 counters by connecting the QD
output to the A input and applying the
input count to the B input which gives a
divide-by-ten square wave at output QA.


Features

- Typical power dissipation 45 mW
- Count frequency 42 MHz

Comments

You need to be logged in to add a comment.

Editing and adding
You need to be logged in to edit and add files and urls etc.
Categories & Tags
Popular tags for this:
ic 


You must be logged in to add tags.

Inventory & Trading

You need to be logged in to administer your inventory

No one is selling this product at this time.

Similar on Ebay
Files
dm74ls93.pdf
   Datasheet for the DM74LS90 and DM74LS93 Decade and Binary Counters
Manufacturers
Fairchild Semiconductors
   Semiconductor manufacturer
Related Products
74LS93
   Decade and Binary Counters