Discontinuation taken from CTS' own Product Change / End-of-Life notices — CTS-authored PDFs opened in full as authorised-distributor mirrors (DigiKey, Mouser). Every record is one entry of a notice's affected-part list, across 4 notices: ECP-3200061 (963 records — clock-oscillator part numbers with the ±100 ppm stability codes 2C/2I discontinued, each replaced by its ±50 ppm 3C/3I equivalent; models 626, 633, 635, 637, 638, 653 & 655), ECP-3200062 (963 records — clock-oscillator part numbers with the −10 °C to +60 °C temperature-range code A discontinued, each replaced by its code C equivalent; models 625, 626, 632, 633, 635, 636, 637, 638, 653 & 655; 968 pairs print, 5 twice, counted once), PCN 20250117-02 (2 records — VF901723-38.400MHz and VF901775-38.400MHz TCXOs, with CTS' recommended alternative 5910001-38M4000 at notice level) and ECP-3200065 (4 records — TFPM legacy tuning fork crystals, EOL without replacement, implementation 17 April 2026). 1,926 of the 1,932 records name a per-part replacement.
Time-critical, stated plainly: ECP-3200065's TFPM EOL took effect 17 April 2026 with no last-time buy offered and no replacement; the VF901 TCXOs' limited last-time buy carries no printed date. The two 2024 ECP notices print only an implementation date (1 June 2024) — no last-time-buy or last-ship dates — so for those the value is the verified migration cross-reference itself: 1,926 discontinued oscillator part numbers, each paired with its CTS successor.
Counting basis, stated plainly: one record per unique part number in a notice's own governing part list, at the exact part number as printed (963 + 963 + 2 + 4 = 1,932). Both ECP lists were parsed by a script that asserts the pairing transformation row by row: every ECP-3200062 pair differs by exactly one character (A → C) and every ECP-3200061 pair by exactly one character (2 → 3), no exceptions.
Honesty notes: the two ECP notices discontinue an ordering option — the discontinued part numbers themselves cease production, and each record is that exact part number. PCN 20250117-02 also prints a second alternative number (5910004-38M400) whose pairing to the two parts is not explicit in the letter; it is recorded at notice level, never as a per-part pairing. Unprinted dates are recorded as not printed, never derived.
Verification standard: CTS-authored notices only — the 4 notices above, each opened in full.
| Notice | Part to be Discontinued | Replacement Part | Last Time Buy | Last Ship |
|---|---|---|---|---|
| ECP-3200061 | 638P12502I3T | 638P12503I3T | Not printed | Not printed |
| ECP-3200061 | 633P10002I2T | 633P10003I2T | Not printed | Not printed |
| ECP-3200062 | 637P5003A2T | 637P5003C2T | Not printed | Not printed |
| ECP-3200062 | 633L2506A2T | 633L2506C2T | Not printed | Not printed |
| PCN 20250117-02 | VF901723-38.400MHz | 5910001-38M4000 (recommended alternative, notice level — see Honesty notes) | Not printed | Not printed |
| ECP-3200065 | TFPM1P32K7680R | None named | Not printed (no LTB offered) | Not printed |
Sample rows are copied verbatim from the paid dataset file (the paid file also carries the series / detail, the issue date and a source URL per record, grouped by notice).
Full file: all 1,932 discontinuance records from CTS' 4 notices above, plus buyer notes and honesty notes. Clean Markdown, compiled 2026-10-22.
Price: 0.10 USDC · Protocol: HTTP 402 (x402, Base) · GET /data/cts-eol-migration-v1.md → 402 → pay → 200
Get the full CTS EOL & Migration Dataset v1 (0.10 USDC)
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Facts compiled from CTS Corporation's published Product Change / End-of-Life notices; not affiliated with or endorsed by CTS Corporation. Trademarks belong to their owners. Verify the current status of any specific part against the original notice before committing a design or a purchase order.