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DIN Connectors

Physical Compatibility

Lower-pin-count DIN plugs can usually (not always) be plugged into higher-pin-count sockets. One notable bug is that there exist 268° (Commodore) and 270° (Japanese 8-bit) 8-pin DIN sockets that are nearly, but not quite, physically compatible.

Standard mini-DIN are keyed so different pincounts are not physically compatible. However, there are non-standard mini-DIN plugs/sockets that are compatible or, worse yet, nearly but not quite compatible.

Pin Numbering

Certain DIN plugs always use the same numbers for the same positions, so that e.g. pin 3 will be in the same place on any connector from 3 to 8 pins. Others simply number "going around" with the centre pin last. By Hosiden-wb (p.3) designations:

  • Positional: DIN-3, -5a, -7, -8a (270°), -8b (268°)
  • "Around": DIN-4, -5b, -6

Five-pin, eight-pin 270° and eight-pin 268°, looking into female jack:

    DIN-3,5a        DIN-5b,6         DIN-7,8a         DIN-8b
       ∪               ∪                ∪                ∪
                   5       1         7     6        8         7
  3         1          6           3    8    1      3    6    1
    5     4         4     2          5     4          5     4
       2               3                2                2

There is also a "DIN-6/5" (my name for it) or "domino DIN" which appears to be a DIN-6 with pin 3 removed (or a DIN-5b with 3 replaced by 6). I can't find a standard mentioning this, but it's used for the BBC Micro serial jack.

References:

Breakouts

CVBS is baseband composite video, usually color.

DIN-5 and DIN-8 (cjs v1)

C5   C8   Pin  CMT        Video
───────────────────────────────────────────────────────────────────────
Blu  Pnk   1   GND/cmt1   Vcc/12V; dot clock; audio; Ys/blank; GND
Blk  Blk   2   GND        GND
Yel  Yel   3   GND/cmt3   CVBS; csync, clock; AVC-TTL, DRGB C.CONT/I
Red  Wht   4   rec/mic    hsync (trad. gray); GND
Grn  Gry   5   play/ear   vsync (trad. black); LPEN (NEC); GND
     Red   6   rem+       DRGB red
     Grn   7   rem-       DRGB green
     Blu   8   GND        DRGB blue

Orange may be substituted for pink where pink not available.

0.1" header breakouts (see header, video) use four or five female connectors:

Looking into female connector
▼           DIN pins
1 2 3       6 7 8           red, green blue     rem+ rem- gnd
1 2         4 5             hsync, vsync        rec/mic play/ear
1           3               CVBS or sync
1           2               GND                 GND
1           1               (optional)

Notes:

  • Old Hard DIN-8 gives many JP pinouts; DIN-5 B/W output (at bottom of page) has 2=GND 3=CVBS on all models
  • C8 colors on any breakouts; C5 colours may be used on some DIN-5 breakouts
  • DIN-5 breakout can be used for CMT if remote relay not required.
  • Pin 1 varies widely between machines; take care for +12V!
  • cmt1/cmt3 are unknown PC-6001 "control" thing; PC-8801 may have Vcc, INT5
  • Yamaha and Victor MSX1 have audio on pin 1 and use AVC-TTL as a control signal to JP-21 connectors to set aspect ratio (SCART pin 11 (8?), 0-12V).
  • Sync cable colors changed from standard gray/black due to GND conflict

CBM (Commodore 64, VIC-20) A/V DIN-5 RCA

Pin Wire    C64         RCA             VIC-20
─────────────────────────────────────────────────────────────
 1  Grn     luminance   Black           ● 6 VDC 10 mA (for RF modulator)
 2  Blk     GND         Shields (all)   GND
 3  Wht     audio out   White           audio out
 4  Yel     CVBS        Yellow          CVBS (standard level)
 5  Red     audio in    Red             CVBS (higher level)
  • Reference: c64-wiki.com A/V Jack
  • Chromanance is pin 6, not available on above breakout, at higher than standard voltage (use 300R-2K if checkered pattern appears in colored areas).

Apple IIc Serial DIN-5 (cjs v1)

See serial.

DIN-4

  • National/Panasonic JR-100 power, from bad pic in my collection.

     color    JR100

    1 +7.8 VDC 2 -8 VDC 3 GND 4 +17 VDC

DIN-6

CBM: CBM serial bus (female) from cbm/serial-bus.

日立BM: Hitachi Basic Master Jr. (MB-6885), experimentally determined.

   color    CBM     日立BM
1   blk     S̅R̅Q̅I̅N̅   relay
2   red     GND     GND
3   orn     A̅T̅N̅     OUT/rec
4   yel     C̅L̅K̅     relay
5   grn     D̅A̅T̅A̅    IN/play
6   blu     R̅E̅S̅E̅T̅   n/c

The S1 pinout from Old Hard CMT may be the Hitachi Basic Master S1; if it uses the same pinout he's just counting the pins backwards, having misinterpreted his diagram as looking into female rather than male.

DIN-7

     AIIc      520ST
1   +15 VDC   +5  VDC
2    CGND      NC
3    SGND      GND
4   +15 VDC   +12 VDC
5    SGND     -12 VDC
6    NC       +5  VDC
7    NC        GND
  • AIIc: Apple IIc power jack (male) from apple2/iic.
  • 502ST: Atari 520ST power jack (male) from [sgntomcat].

DIN-8: CMT (Cassette Tape)

  2  GND        Computer usu. also 1, 3, 8; cable usu. unconnected.
  4  REC        CMT microphone; output from computer
  5  PLAY       CMT playback; input to computer
6,7  REM+,REM-  Relay open for stop; closed for motor run

Manufacturer cables I have invariably connect only 2 to ground, leaving 1, 3, 8 and shield unconnected. Also invariably, relay ring is 6 and relay tip is 7. (All came with used equipment, one with a Panasonic JR-200, one with a NEC PC-DR311 data recorder, one from unknown source.)

Smartphone Connections

Apple standard headphone connectors and most (?) Android use the following TRRS, but some other phones swap ground and mic. In all cases, shorting mic and ground makes the device output only. The mic connection otherwise must see enough impedance to be detected; a resistor in series with the CMT output can help with this. See below for values.

                GALAXY¹ SAMSUNG
tip     left    green   green
ring 1  right   blue    red
ring 2  ground  copper  copper
sleeve  mic     red     black
  • ¹ The Galaxy colours are also the ones in my white TRRS extension cables. Obviously these vary.

On the Apple iPhone-style pinout, the headset button also shorts mic. to ground. CMT resistor 1.6 kΩ.

2.2 kΩ tested to work on ThinkPad T510 built-in headset socket. pavucontrol displays "unplugged" when JR-200 directly connected; "plugged in" when unconnected or series resitor in place.

queuebert's Mercari DIN-8 to smartphone cable (works with FM-8):

TRRS     DIN-8   Notes
───────────────────────
tip     5 PLAY
ring 1  3 GND   right channel shorted to ground
ring 2  3 GND   relies on computer having GND on pin 3
sleeve  4 REC   2k2 inline; 12k to ground

On the Apple iPhone-style pinout, the headset button also shorts mic. to ground. Series 1k6 resistor between computer and sleeve suggested.

HTC pinout (including many Android models, such as Nexus One) is the same, but Apple mics often don't work. Standard mic/gnd resistance with no button pressed 47 KΩ on Nexus One, 33 KΩ on Desire S. Multi-button remotes use various resistances between mic and ground for signalling, e.g. play=1Ω, back=220Ω, next=600Ω.

Common Pinouts

A large number of different applications, particularly audio, are given here. Note that page is looking into the male plug, not the female jack as above.

MIDI current loop (usu. +5 V):

1   N/C
2   GND/shield on output; N/C on input
3   N/C
4   Current source
5   Current sink controlled by UART

IBM PC, PC/XT, PC/AT Keyboard

1   Clock
2   Data
3   Reset (PC, XT only)
4   GND
5   VCC (+5 V from computer)
European-standard Analogue Audio

See euaudio.

2   GND

Mini-DIN

The following is a mini-DIN-4 connector, looking into the female jack on a device, with the Y/C (S-Video) pinout.

 /¯¯¯U¯¯¯\      1   GND (Y)
|  4   3  |     2   GND (C)
| 2     1 |     3   Y Luma (intensity)
 \_|■■■|_/      4   C Chroma (color)

Common DE-15 (VGA) to 3×RCA + mini-DIN-4 cables converters have pins 2, 3 and 4 cabled, but leave pin 1 unconnected at the mini-DIN end.