DS1990A-F3

DS1990A-F3 Serial Number iButton

Same Ø16.25 mm diameter as the F5 in a slimmer 3.1 mm F3 can for flush mounting.

Intended to behave like the DS1990A-F5 electrically (per the original manufacturer's datasheet; confirm for the supplied version), but in the low-profile F3 can — same Ø16.25 mm diameter, 3.10 mm instead of 5.89 mm high. A candidate for flush-mount receptors, adhesive checkpoint mounting and panel applications where the flanged F5 does not fit; check a sample in your receptor first.

Ordering information

MOQ	Confirmed by model and order when quoting
Preparation time	Availability and lead time are confirmed by model and order when quoting
Packing	Confirm pack quantity, protection and labelling for the selected model.
Samples	Sample quantity, fees and shipping are confirmed for the selected model.
Payment	Agree payment terms and the payee in the quotation and invoice.
Shipping	Confirm the shipping method, cost and timing for your destination and order.
Customization	State ROM, colour, marking and packing needs; feasibility and cost require confirmation.

Key features

Same read-only 64-bit ROM and family code 01h as the DS1990A-F5, per the original manufacturer's datasheet; confirm for the supplied version.
Low-profile F3 can (3.10 mm high, against 5.89 mm for the F5) suits flush-mount receptors and panels where the F5 flange is unwanted.
Same 1-Wire interface and −40 to +85 °C operating range as the F5, per the original manufacturer's datasheet; confirm for the supplied version. Test a sample on your own reader before ordering.

Specifications

Chip / compatibility	DS1990A format
Memory	64-bit ROM, read-only
Package	F3 can, Ø16.25 × 3.10 mm
Protocol	1-Wire®
Operating temperature	−40 °C … +85 °C (1-Wire chip, per the original manufacturer's datasheet; confirm for the supplied version)

Inside the stainless can

Typical F5 can: Ø16.25 × 5.89 mm · typical F3 can: Ø16.25 × 3.10 mm

Original DS1990A layout reference: 8-bit family code + 48-bit serial + 8-bit CRC

Typical construction of this can format: a stainless-steel shell, an insulating grommet separating lid from base, and the chip bonded inside. Lid = data contact, base = ground return. Wall thickness, grommet material and other construction details: confirm for the supplied version.

Typical applications

Access Control Elevator & Floor Access Smart Home, 1-Wire & KNX

Frequently asked questions

What is the difference between the F3 and F5 cans?

The main difference is height: both are Ø16.25 mm, but the F3 is 3.10 mm high against the F5’s 5.89 mm, and has no flange. Both are intended to carry the same DS1990A-compatible 64-bit ROM chip; confirm the chip version for the supplied unit.

Does it read on the same readers as the F5?

It is intended to — both are offered as DS1990A-compatible 64-bit ROM keys. Compatibility depends on your reader, controller and firmware; test a sample on your own system before ordering.

When should I pick the F3 form?

Flush-mount receptors, adhesive checkpoint mounting, and panel applications where the flanged F5 physically does not fit — the low profile sits nearly level with the surface.