E1M-X V2N-M1 Reliability Report
Summary
This report gives the predicted reliability of the E1M-X V2N-M1 System-on-Module — Renesas RZ/V2N application processor with the on-module DeepX DX-M1 AI accelerator — as MTBF and FIT (1 FIT = 1 failure per 109 device-hours). It is a parts-count prediction per Telcordia SR-332 Issue 4, summing the steady-state failure rate of all 1303 electrical components on the module. It is an intrinsic, random-failure estimate for the useful-life region; it excludes infant mortality (screened in production) and end-of-life wear-out.
Headline — at the +55 °C operating reference (GF): λ ≈ 2585 FIT, giving an MTBF of ≈ 387 000 hours, equivalent to a 5-year field survival of ≈ 89.3% and a 10-year survival of ≈ 79.7% under continuous 24/7 use. See Results and the +25…+85 °C sweep in Temperature & Environment Sensitivity.
The DeepX DX-M1 accelerator FIT is now the DeepX-published field-equivalent value — 8.245 FIT at 60% CL from the DX-M1 HTOL qualification (JESD22-A108, 125 °C / 1000 h / 231 pcs, 0 failures; MTTF ≈ 1.21 × 108 h) — replacing the previous 80 FIT engineering estimate. This drops the headline from ≈ 2842 FIT / 352 000 h to ≈ 2585 FIT / 387 000 h. The Renesas SoC and Murata Wi-Fi module (†) remain on engineering estimates. See Vendor Reliability Data.
MTBF is a fleet statistical measure, not a service life. 352 000 h does not mean a unit lasts 40 years; it means one intrinsic failure is expected per 352 000 cumulative operating hours across a fielded population — i.e. ≈ 107 failures per 1000 units over 5 years of 24/7 use. The lower MTBF relative to a simple SoM reflects this module's high complexity (≈1300 parts, dual-PHY, multi-rail power, large memory and a second AI silicon device).
This report covers the V2N-M1 variant (DeepX DX-M1 populated). The base E1M-X V2N (without the DeepX subsystem) is covered by RL-V2N-001 (≈ 2443 FIT / ≈ 409 000 h at +55 °C). With the DeepX DX-M1 now on vendor field-equivalent data (8.245 FIT, Vendor Reliability Data) rather than the 80 FIT estimate, the accelerator device itself adds only ≈ 8 FIT; the remaining M1 subsystem delta is dominated by the PCIe/USB muxes and interconnect parts (Failure-Rate Budget).
Reference Condition
Table: Reference condition for the headline prediction
| Parameter | Value |
|---|---|
| Prediction standard | Telcordia SR-332 Issue 4, Method I (parts count) |
| Environment | Ground Fixed, Controlled (GF) |
| Rated operating range | − 40 °C to +85 °C (industrial extended) |
| Headline operating ambient | +55 °C (representative loaded operating point) |
| Component-FIT build-up | +40 °C (Telcordia generic-device reference) |
| Duty cycle | 100% (continuous, 24/7) |
| Component quality | Commercial, Quality Level II |
| Confidence level | 50% (point estimate) |
Method
The module failure rate is the series sum λmodule = Σi ni · λi (any one part failing is a module failure; no on-module redundancy), and MTBF = 1 / λmodule. Each λi embeds the Telcordia quality and reference-temperature factors. The per-class FIT is tabulated at the +40 °C Telcordia reference (build-up total ≈ 1132 FIT) and scaled to the +55 °C operating headline by the Arrhenius factor πT ≈ 2.28 on the silicon subtotal (Temperature & Environment Sensitivity), giving ≈ 2585 FIT. Non-electrical items (test pads, tooling) are excluded.
Failure-Rate Budget
The module carries 1303 electrical placements across 98 line items. Silicon is ≈ 57% of the budget; the Renesas SoC and DeepX accelerator together are ≈ 11% (the DeepX device now on vendor data, Vendor Reliability Data). Values are at the +40 °C Telcordia reference build-up.
Table: E1M-X V2N-M1 failure-rate budget by class (+40 °C Telcordia reference)
| Component class | Qty | FIT total | Share |
|---|---|---|---|
| Ceramic capacitors (MLCC) | 812 | 324.8 | 28.7% |
| Application SoC (Renesas RZ/V2N) † | 1 | 120.0 | 10.6% |
| DC-DC switching regulators | 5 | 76.0 | 6.7% |
| Wi-Fi / BLE module (Murata) † | 1 | 60.0 | 5.3% |
| Flash — eMMC / OSPI NOR / SPI NAND § | 3 | 56.2 | 5.0% |
| Chip resistors | 372 | 55.8 | 4.9% |
| Load switches | 10 | 50.0 | 4.4% |
| LPDDR4 / 4X DRAM § | 3 | 50.0 | 4.4% |
| Crystals | 6 | 48.0 | 4.2% |
| Ethernet PHY (2 × GbE) | 2 | 40.0 | 3.5% |
| LDO regulators | 6 | 36.0 | 3.2% |
| Clocks / RTC | 4 | 36.0 | 3.2% |
| Other (level shifter, LED drv, temp, buffer, TVS, supercap, RF conn) | 9 | 32.5 | 2.9% |
| Multi-output PMIC | 1 | 25.0 | 2.2% |
| CAN transceivers | 2 | 20.0 | 1.8% |
| Ferrite beads | 38 | 19.0 | 1.7% |
| Power inductors | 19 | 19.0 | 1.7% |
| Board-to-board connector | 1 | 15.0 | 1.3% |
| Companion MCU (GD32) | 1 | 15.0 | 1.3% |
| PCIe / USB muxes [M1] | 2 | 12.0 | 1.1% |
| EEPROM | 2 | 12.0 | 1.1% |
| Secure element | 1 | 7.0 | 0.6% |
| AI accelerator (DeepX DX-M1) ‡ [M1] | 1 | 2.5 | 0.2% |
| Total | 1303 | ≈ 1132 | 100% |
‡ vendor-qualified: DeepX-published field-equivalent FIT for the DX-M1 (8.245 FIT @ 60% CL, JESD22-A108 HTOL; Vendor Reliability Data), back-referenced to the +40 °C build-up (÷ ≈ 3.27). † engineering estimate pending vendor reliability report (Renesas SoC, Murata Wi-Fi module). § chi-square 60% upper confidence limit from the JEDEC JESD47 HTOL qualification, accelerated to +40 °C with Ea = 0.7 eV (memory). [M1] marks parts unique to the V2N-M1 variant. Shares may not sum to 100% due to rounding.
Results
Table: Predicted reliability at the +55 °C operating headline (GF)
| Metric | Value |
|---|---|
| Total failure rate, λ | 2585 FIT |
| MTBF | 387 000 h |
| MTBF (years, continuous) | 44 yr |
| Survival R(1 yr) | 97.76% |
| Survival R(3 yr) | 93.43% |
| Survival R(5 yr) | 89.29% |
| Survival R(10 yr) | 79.74% |
Table: Expected intrinsic failures per 1000 fielded units (24/7, +55 °C)
| Mission time | Survival R(t) | Fails / 1000 units |
|---|---|---|
| 1 year | 97.76% | ≈ 22.4 |
| 3 years | 93.43% | ≈ 65.7 |
| 5 years | 89.29% | ≈ 107.1 |
| 10 years | 79.74% | ≈ 202.6 |
Temperature & Environment Sensitivity
The silicon subtotal scales by πT = exp[Ea/k (1/Tref − 1/T)] with a generic Ea = 0.7 eV; passives, crystals, connectors and the PCB are held roughly constant. Each row assumes junctions track ambient (light-to-moderate load); under heavy SoC + DeepX load the junctions self-heat above ambient, so the hot-corner rows are ambient-only and optimistic until the thermal solution is folded in.
Table: MTBF vs. ambient temperature (junction ≈ ambient)
| Ambient | πT | λ (FIT) | MTBF (h) | MTBF (yr) | R(5 yr) |
|---|---|---|---|---|---|
| +25 °C | 0.27 | 664 | 1 510 000 | 172 | 97.1% |
| +40 °C † | 1.00 | 1132 | 884 000 | 101 | 95.2% |
| +55 °C * | 3.27 | 2585 | 387 000 | 44 | 89.3% |
| +70 °C | 9.66 | 6677 | 150 000 | 17 | 74.6% |
| +85 °C ‡ | 26.0 | 17 140 | 58 300 | 7 | 47.2% |
* Headline operating point. † +40 °C Telcordia build-up reference. ‡ Rated maximum ambient.
The two AI silicon devices (Renesas SoC + DeepX) and the multi-rail power section are the hottest parts and dominate the temperature sensitivity — thermal design on those is the highest-leverage reliability action for the integrator.
Vendor Reliability Data (DeepX DX-M1)
The DeepX DX-M1 accelerator FIT used above is no longer an engineering estimate: it is the DeepX-published field-equivalent figure from the DX-M1 (IC) MTTF report. The DX-M1 is a 5 nm FCBGA device.
Table: DeepX DX-M1 field-equivalent reliability (DeepX MTTF report)
| Parameter | Value |
|---|---|
| Life test | HTOL (JESD22-A108), 125 °C, 1000 h, 231 pcs, 0 failures |
| Acceleration | AFTotal = AFTemp (Arrhenius) × AFVoltage (E-model), 60% CL |
| FIT @ 60% CL | 8.245 FIT |
| MTTF | ≈ 1.21 × 108 h (121 287 290 h) |
The 8.245 FIT is the DX-M1 device figure; it enters the module budget back-referenced to the +40 °C build-up (÷ ≈ 3.27) so the silicon-Arrhenius scaling of Temperature & Environment Sensitivity reproduces 8.245 FIT at the +55 °C headline.
The DX-M1 additionally passed the full AEC-Q100 / JEDEC production qualification (DeepX DX-M1 Reliability Test Report, all lots 0 failures / PASS):
Table: DeepX DX-M1 qualification summary (all PASS)
| Stress | Condition | Method |
|---|---|---|
| HTOL | 125 °C, ≥ Vccmax, 1008 h | JESD22-A108 |
| ELFR | 125 °C, 48 h, 800 ea/lot | AEC-Q100-008 |
| Precon / MSL | MSL3, J-STD-020 | JESD22-A113 |
| HAST | 110 °C / 85% RH, Vccmax, 264 h | JESD22-A101/A110 |
| uHAST | 130 °C / 85% RH, 96 h | JESD22-A102/A118 |
| Temp cycle | − 55 °C ↔ +150 °C, 1000 cyc | JESD22-A104 |
| HTS | 150 °C, 1000 h | JESD22-A103 |
| Mech. shock | 1500 g, 0.5 ms | JESD22-B110 |
| Vibration | 50 g, 20 Hz–2 kHz | JESD22-B103 |
| ESD | HBM ± 1000 V / CDM ± 250 V | AEC-Q100-002/011 |
| Latch-up | ± 100 mA / Vmax, 125 °C | AEC-Q100-004 |
Assumptions & Limitations
- Parts-count (Method I), not parts-stress — accepted at the design/datasheet stage and typically conservative for a derated design.
- Series reliability — no on-module redundancy credited.
- Mixed FIT provenance. The DeepX DX-M1 is now on vendor field-equivalent data (‡ — DeepX MTTF report, Vendor Reliability Data). The Renesas SoC and the Murata Wi-Fi module (†) remain engineering estimates pending vendor data; memory FITs (§) are conservative JEDEC-qual chi-square bounds. Substituting the two remaining † terms is now the main path to tightening the prediction.
- V2N-M1 variant. The DeepX subsystem delta (Failure-Rate Budget) is based on the parts attributed to it in the netlist; confirm the fitted/DNP variant split.
- Excludes solder-joint thermal fatigue (separate IPC-9701 analysis), infant mortality, and end-of-life wear-out.
- Point estimate at 50% confidence.
Revision History
Table: Document revision history
| Revision | Changes | Date |
|---|---|---|
| 0.1 | Initial parts-count MTBF prediction (Telcordia SR-332 Issue 4) from the released E1M-X V2N + M1 netlist (1303 placements). Renesas SoC, DeepX accelerator and Wi-Fi module on engineering estimates; memory on JEDEC-qual chi-square bounds. | June 2026 |
| 0.2 | DeepX DX-M1 accelerator FIT replaced with DeepX vendor field-equivalent data (8.245 FIT @ 60% CL; DX-M1 MTTF report). Added the Vendor Reliability Data section () summarising the DX-M1 MTTF report and the AEC-Q100/JEDEC Reliability Test Report (all PASS). Headline improves to ≈ 2585 FIT / 387 000 h; budget reordered (DeepX now the smallest silicon term). Renesas SoC and Murata Wi-Fi module remain engineering-estimate (†) terms. | July 2026 |