RW1990 Rewritable Blank
The classic rewritable TM blank for duplicating services.
Writable 64-bit ROM emulator: the ID can be programmed and re-programmed with any standard TM duplicator, letting a shop copy an existing DS1990A key onto a fresh blank in seconds. The core consumable of the key-cutting trade.
The blank every duplicator can write
RW1990 is the reference format of this whole category. If a copier can write anything at all, it writes this — TMD-5S, Keymaster, TM Pro, the Arduino projects, all of them implement the RW1990.1 command set first, and most implement nothing else on day one. That makes it the safe stock item: order it when you do not know what hardware your customers own. Its limits are equally clear — it covers the Dallas branch only, and because it stays rewritable forever a copy can itself be re-copied. For Cyfral/Metakom doors use RW2000; where the estate forbids re-writable copies, use the OTP TM-01A.
Key features
- Writable 64-bit ROM emulator — program and re-program the ID with any standard TM duplicator.
- The core consumable of the key-cutting trade — copy a DS1990A onto a fresh blank in seconds.
- Roughly 10⁵ rewrite cycles; F5 can; supplied bulk, mixed colours, with or without fob.
- Also known as TM1990B / TM2008 — same product, different names across markets.
Specifications
| Chip / compatibility | RW1990 / DS1990A emulation · factory model TMK-RW1990 |
|---|---|
| Memory | 64-bit writable ID, ~10⁵ rewrite cycles |
| Protocol | Write protocol "RW1990.1": unlock with D1h, write ROM with D5h, data bits inverted — the format every duplicator implements first |
| Package | F5 can |
| Options | Bulk packing, mixed colours, with or without fob |
Inside the stainless can
A 0.25 mm solid stainless shell, a UV-stable polypropylene grommet isolating lid from base, and the die bonded inside. Lid = data contact, base = ground return.
Which blank does your duplicator write?
Blanks differ less in the finished key than in how the copier writes them. Protocol names follow the routines used in mainstream and open-source duplicator firmware — check the blank list in your machine's manual before ordering.
| Model | Key format | Write protocol | Rewritable? | Pick it for |
|---|---|---|---|---|
| RW1990 | Dallas 1-Wire | RW1990.1 | Rewritable, ~10⁵ cycles | The safe default — every copier writes it |
| RW1990.2 | Dallas 1-Wire | RW1990.2 | Rewritable | When the copier lists ".2" specifically |
| TM-01A | Dallas 1-Wire | TM-01 | One-time only — locks after writing | Estates that ban re-writable duplicates |
| TM08v2 | Dallas + Cyfral + Metakom | RW1990.1 | Rewritable | One SKU for a mixed estate |
| RW2004 / TM2004 | Dallas 1-Wire (+ multi-format versions) | TM2004 | Rewritable + writable memory block | Controllers that read data, not just an ID |
| RW2000 | Cyfral / Metakom | RW2000 (~8 V) | One-time only — locks after writing | Cyfral & Metakom doors, tamper-proof copy |
Ordering information
| MOQ | 100 pcs |
|---|---|
| Lead time | 3–7 days for stock items, 10–15 days for OEM |
| Packing | Bulk ESD bags (100–200 pcs/bag, 2 bags/carton); blister or header cards for retail on request |
| Samples | Free samples for volume buyers — courier at cost |
| Payment | T/T bank transfer; other terms negotiable for repeat orders |
| Shipping | DHL / FedEx / UPS air express; sea or rail freight for pallet volumes |
| Customization | ROM ranges · housing colours · laser logo · private label |
Typical applications
Frequently asked questions
How many times can an RW1990 be rewritten?
The RW1990 is a writable ROM emulator, rated on the order of 100,000 write cycles. Its 64-bit ID can be programmed and re-programmed with any standard TM duplicator, which is what lets a key-cutting shop copy an existing DS1990A onto a fresh blank in seconds.
Is RW1990 the same as TM1990B or TM2008?
Yes — TM1990B, TM2008 and RW1990 are the same rewritable product under different names across markets. They program on the same duplicators and emulate the DS1990A.
Which duplicators program the RW1990?
Any standard Touch Memory duplicator, including our one-touch TMPRG_Easy and the handheld TMPRG_D. If your customers run older or mixed copier hardware, the revised RW1990.2 or the universal TM08v2 blank answers a broader set of write commands.
Related products
RW1990.2 Rewritable Blank
Revised RW1990 with wider duplicator compatibility.
TM-01A One-Time Copy Blank (Dallas OTP)
Copies a TM1990A / DS1990A once — then locks permanently, like an original.
TM08v2 Universal Blank
Latest-generation universal blank with the widest reader coverage.
RW2004 Rewritable Blank
Rewritable blank with memory area for extended-format keys.