FIELD GUIDESource-led reference
Port & Cable

E322 · Source-scoped pinout variants

6P6C modular plug (often sold as RJ12) engineering reference

Named wiring from the pinout research; connector shape alone does not establish capabilities.

Open field noteSource trail

Source checked · no independent review claimed · Fabrication approved: no

6P6C modular (RJ12) engineering reference original orientation schematic
Original pinout diagram; read the exact variant and view below. Not to scale.

Orientation

How to read this profile

Read the exact variant view convention. Schematic layouts do not establish physical positions.

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts6S091Nominal contact count; some implementations may omit populated positions. It is not a wiring map.
Positions / cavity span6 (Claim C112A)S091Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Identification and explicitly scoped documentation only; not an end-to-end connection approval
Connector roleplug (135-0341)S923Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 135-0341. Documented role: plug. Flat26AWG is accepted wire, not connector pitch or housing dimension. Generic4–8position wording does not transfer8position non-keyed attribute to other forms.
ManufacturerPrimex (135-0341)S923Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 135-0341. Documented role: plug. Flat26AWG is accepted wire, not connector pitch or housing dimension. Generic4–8position wording does not transfer8position non-keyed attribute to other forms.
SeriesModular Plugs (135-0341)S923Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 135-0341. Documented role: plug. Flat26AWG is accepted wire, not connector pitch or housing dimension. Generic4–8position wording does not transfer8position non-keyed attribute to other forms.
Exact part / implementation135-0341 (135-0341)S923Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 135-0341. Documented role: plug. Flat26AWG is accepted wire, not connector pitch or housing dimension. Generic4–8position wording does not transfer8position non-keyed attribute to other forms.

Not recorded: Populated contacts, Contact rows, Contact pitch, Dimensions / axis, Contact gender / arrangement, Mounting, Coupling / latch, Keying / polarization, Shell / form, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits
  • Check the exact device manual before wiring or applying power.
  • Microchip MPLAB ICD 3 target-board 6-pin modular connector (Microchip calls it 'RJ-11'): Bottom view of target PCB per Figures 2-3 and B-2.
  • FCC registered jack RJ18C / RJ18W (single line with make-busy): 47 CFR 68.502 diagram position numbering.
  • Microchip MPLAB ICD 5 legacy 6-pin RJ-11 cable, target side, ICSP: Microchip Table 3-2 '6-Pin Modular Connector' numbering.
Report a correction to these facts →

Pins & wiring

Pinout

Choose the exact wiring. Pin numbers follow its stated view; a schematic does not establish physical positions. Check your exact device before wiring.

What the status labels mean
Confirmed
Recorded research passes agree within this variant; this is not independent human review or hardware validation.
Single source
Only one underlying document, or one pass, supports this assignment.
Device-specific
Supported for the named equipment or wiring only. Check your device’s manual.
Unverified
Missing or conflicting evidence. Do not wire from this row.
Not connected
The source explicitly says NC, no contact or no pin for this wiring.
Wiring variant

Microchip MPLAB ICD 3 target-board 6-pin modular connector (Microchip calls it 'RJ-11')

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

Bottom view of target PCB per Figures 2-3 and B-2.

  • P112 6P6C ("RJ12") — **No overlap: different variants** — Pass A: Microchip ICD 3 target jack. Pass B: FCC RJ18C plus Microchip ICD 5. ICD 3 and ICD 5 agree on pins 1–5 (MCLR/Vpp, VDD, GND, PGD, PGC); pin 6 differs by tool (LVP/PGM vs TAUX), as expected for device-specific wiring. **Neither pass could source the common retail telephone "RJ12" wiring** (RJ12C/RJ25C); TIA-1096-A is paywalled.
  • Device-specific programming/debug interface, not a telephone wiring standard.
  • Microchip notes cable connections at the debugger and target are mirror images (pin 1 at one end meets pin 6 at the other end).
  • Neither USOC appears in 47 CFR 68.502 (1996-2000 editions checked); the current description (TIA-1096-A) is paywalled and was not inspected.
  • Microchip specifies AMP 555165-1 and a six-conductor cable; the AMP drawing itself was not inspected.
6P6C modular (RJ12) engineering referenceBottom view of target PCB per Figures 2-3 and B-2.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: VPP/MCLR (device_specific)12: VDD (Target) (device_specific)23: VSS (Ground) (device_specific)34: PGD (RB7) (device_specific)45: PGC (RB6) (device_specific)56: LVP / PGM (device_specific)6powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
Microchip MPLAB ICD 3 target-board 6-pin modular connector (Microchip calls it 'RJ-11') — source-scoped contact map
PinSignalWhat it doesStatus
1VPP/MCLRControl, detection or configuration connection; check the source and device.Device-specific
Sources
2VDD (Target)Power connection (VDD (Target)). Check the specified supply.Device-specific
Sources
3VSS (Ground)Ground reference and return.Device-specific
Sources
4PGD (RB7)Control, detection or configuration connection; check the source and device.Device-specific
Sources
5PGC (RB6)Control, detection or configuration connection; check the source and device.Device-specific
Sources
6LVP / PGMControl, detection or configuration connection; check the source and device.Device-specific
Sources
Sources (1)

FCC registered jack RJ18C / RJ18W (single line with make-busy)

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

47 CFR 68.502 diagram position numbering.

  • P112 6P6C ("RJ12") — **No overlap: different variants** — Pass A: Microchip ICD 3 target jack. Pass B: FCC RJ18C plus Microchip ICD 5. ICD 3 and ICD 5 agree on pins 1–5 (MCLR/Vpp, VDD, GND, PGD, PGC); pin 6 differs by tool (LVP/PGM vs TAUX), as expected for device-specific wiring. **Neither pass could source the common retail telephone "RJ12" wiring** (RJ12C/RJ25C); TIA-1096-A is paywalled.
  • Neither RJ12C (key-telephone A/A1 leads) nor RJ25C (three-line) appears in the 10-1-00 edition of 47 CFR 68.502, and TIA-1096-A is paywalled, so the configurations behind the retail name 'RJ12' were not verified.
  • Microchip Table 3-3 shows that the UART TX/RX lines sit on 8-pin positions that the 6-pin cable does not carry; not mapped.
6P6C modular (RJ12) engineering reference47 CFR 68.502 diagram position numbering.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: MB (device_specific)12: Reserved (device_specific)23: R (ring) (device_specific)34: T (tip) (device_specific)45: Reserved (device_specific)56: MB1 (device_specific)6powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
FCC registered jack RJ18C / RJ18W (single line with make-busy) — source-scoped contact map
PinSignalWhat it doesStatus
1MBControl, detection or configuration connection; check the source and device.Device-specific
Sources
2ReservedReserved; no general-purpose wiring is established.Device-specific
Sources
3R (ring)Control, detection or configuration connection; check the source and device.Device-specific
Sources
4T (tip)Control, detection or configuration connection; check the source and device.Device-specific
Sources
5ReservedReserved; no general-purpose wiring is established.Device-specific
Sources
6MB1Control, detection or configuration connection; check the source and device.Device-specific
Sources
Sources (1)

Microchip MPLAB ICD 5 legacy 6-pin RJ-11 cable, target side, ICSP

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

Microchip Table 3-2 '6-Pin Modular Connector' numbering.

  • P112 6P6C ("RJ12") — **No overlap: different variants** — Pass A: Microchip ICD 3 target jack. Pass B: FCC RJ18C plus Microchip ICD 5. ICD 3 and ICD 5 agree on pins 1–5 (MCLR/Vpp, VDD, GND, PGD, PGC); pin 6 differs by tool (LVP/PGM vs TAUX), as expected for device-specific wiring. **Neither pass could source the common retail telephone "RJ12" wiring** (RJ12C/RJ25C); TIA-1096-A is paywalled.
  • Neither RJ12C (key-telephone A/A1 leads) nor RJ25C (three-line) appears in the 10-1-00 edition of 47 CFR 68.502, and TIA-1096-A is paywalled, so the configurations behind the retail name 'RJ12' were not verified.
  • Microchip Table 3-3 shows that the UART TX/RX lines sit on 8-pin positions that the 6-pin cable does not carry; not mapped.
6P6C modular (RJ12) engineering referenceMicrochip Table 3-2 '6-Pin Modular Connector' numbering.SCHEMATIC · physical positions unconfirmedNot to scale · check the named wiring and device manual1: MCLR/Vpp (TVPP) (device_specific)12: VDD (TVDD) (device_specific)23: GND (device_specific)34: PGD (ICSP DAT) (device_specific)45: PGC (ICSP CLK) (device_specific)56: TAUX (device_specific)6powergrounddataConfigshieldNCUnknown
Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.
Microchip MPLAB ICD 5 legacy 6-pin RJ-11 cable, target side, ICSP — source-scoped contact map
PinSignalWhat it doesStatus
1MCLR/Vpp (TVPP)Control, detection or configuration connection; check the source and device.Device-specific
Sources
2VDD (TVDD)Power connection (VDD (TVDD)). Check the specified supply.Device-specific
Sources
3GNDGround reference and return.Device-specific
Sources
4PGD (ICSP DAT)Control, detection or configuration connection; check the source and device.Device-specific
Sources
5PGC (ICSP CLK)Clock or clock-control connection, as named by this source.Device-specific
Sources
6TAUXControl, detection or configuration connection; check the source and device.Device-specific
Sources
Sources (1)

Unknowns stay unknown.

  • Check the exact device manual before wiring or applying power.

Your next step

Use the detail without guessing past its limits.

Read the connector field note Recognition clues and practical checks.Work through a connection Keep exact equipment and cable requirements separate.

Source trail

Claims and sources

C804Ksource checked

Microchip MPLAB ICD 3 target-board 6-pin modular connector (Microchip calls it 'RJ-11'): original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Microchip Technology Inc. · MPLAB ICD 3 In-Circuit Debugger User's Guide for MPLAB X IDE ↗
Appendix B.5.2.1 'Modular Connector Specification' (AMP 555165-1) and Figure B-2 'Modular Connector Pinout of Target Board'; Section 2.4.1 Figure 2-3 'Standard Connection at Target' (pin numbering shown from the bottom of the target PCB) and Section 2.4.2 Figure 2-4 'Standard Connection Target Circuitry' · Source scope and unresolved evidence are preserved in the engineering variant.

C804Lsource checked

FCC registered jack RJ18C / RJ18W (single line with make-busy): original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

U.S. Government Publishing Office / Federal Communications Commission · Code of Federal Regulations, Title 47, Chapter I, Part 68, Section 68.502 (Configurations) ↗
Sec. 68.502(a)(1) 'Bridged T/R; 6-position jack', USOC RJ11C/RJ11W, text and wiring diagram, printed p. 433; Sec. 68.502(a)(3) 'Bridged T/R with make-busy arrangement; 6-position jack', USOC RJ18C/RJ18W, text p. 434 and wiring diagram p. 435; Sec. 68.502(c)(1) 'Two-line configurations - Bridged T/R; 6-position jack', USOC RJ14C/RJ14W, text p. 437 and wiring diagram p. 438 · Source scope and unresolved evidence are preserved in the engineering variant.

C804Msource checked

Microchip MPLAB ICD 5 legacy 6-pin RJ-11 cable, target side, ICSP: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Microchip Technology · MPLAB ICD 5 In-Circuit Debugger User's Guide, section 3.3.2 Target Connection Pinouts (online HTML edition) ↗
Section 3.3.2, Table 3-2 'Pinouts for Debug Interfaces', '6-Pin Modular Connector' column against the 'Pin Name' and 'ICSP (MCHP)' columns (TARGET side) · Source scope and unresolved evidence are preserved in the engineering variant.

3 source records support this profile. No independent engineering review or hardware validation is claimed.

Evidence behind this page

Scope first. Source second. Approval separate.

3 linked sources · 3 scoped claims · 0 sources with inspection/access flags.

Page scope: Original schematic; not to scale and not fabrication approval.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-18. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 3 source scopes, access limits and dates

S733 · Code of Federal Regulations, Title 47, Chapter I, Part 68, Section 68.502 (Configurations)

U.S. Government Publishing Office / Federal Communications Commission · Unclassified publisher domain · inspected 2026-10-20 · due 2027-01-18

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: Sec. 68.502(a)(1) 'Bridged T/R; 6-position jack', USOC RJ11C/RJ11W, text and wiring diagram, printed p. 433; Sec. 68.502(a)(3) 'Bridged T/R with make-busy arrangement; 6-position jack', USOC RJ18C/RJ18W, text p. 434 and wiring diagram p. 435; Sec. 68.502(c)(1) 'Two-line configurations - Bridged T/R; 6-position jack', USOC RJ14C/RJ14W, text p. 437 and wiring diagram p. 438

S734 · MPLAB ICD 3 In-Circuit Debugger User's Guide for MPLAB X IDE

Microchip Technology Inc. · Manufacturer / product-owner domain · inspected 2026-10-20 · due 2027-01-18

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: Appendix B.5.2.1 'Modular Connector Specification' (AMP 555165-1) and Figure B-2 'Modular Connector Pinout of Target Board'; Section 2.4.1 Figure 2-3 'Standard Connection at Target' (pin numbering shown from the bottom of the target PCB) and Section 2.4.2 Figure 2-4 'Standard Connection Target Circuitry'

S735 · MPLAB ICD 5 In-Circuit Debugger User's Guide, section 3.3.2 Target Connection Pinouts (online HTML edition)

Microchip Technology · Manufacturer / product-owner domain · inspected 2026-10-20 · due 2027-01-18

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: Section 3.3.2, Table 3-2 'Pinouts for Debug Interfaces', '6-Pin Modular Connector' column against the 'Pin Name' and 'ICSP (MCHP)' columns (TARGET side)

Trace 3 claims to their source records

C804K · P112

Microchip MPLAB ICD 3 target-board 6-pin modular connector (Microchip calls it 'RJ-11'): original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S734 · Evidence trail → (private workspace)

C804L · P112

FCC registered jack RJ18C / RJ18W (single line with make-busy): original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S733 · Evidence trail → (private workspace)

C804M · P112

Microchip MPLAB ICD 5 legacy 6-pin RJ-11 cable, target side, ICSP: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S735 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.