Märklin Digital Decoder Chips

Table of Contents

Glossary

The meaning of the table entries is:

chip number: the number that identifies the chip
case: the housing of the chip. DIL is the large case for "through-hole" insertion, SO is small-outline for SMD technology
analog detection: if yes, the loco automatically behaves like a conventional loco on analog track
signal inversion: exchange of red/brown track connection so that signal is inverted
signal format: can be either Motorola 1 or Motorola 2. In Motorola 1 only aux. function, speed, or direction change can be signalled. In Motorola 2, additionally direction and f1 - f4 can be signalled
aux. function f0: the auxiliary function, usually used for direction dependent head light. "protected" means that the driving transistor and overload and short circuit protection are built into the chip
ext. functions f1 - f4: extended functions f1 - f4, only possible in Motorola 2 mode
internal motor driver: if yes the motor driving stage is built into the chip and no external circuitry is required.
internal motor control: if yes the motor control to achieve constant speed is built into the chip
internal accel./decel.: if yes the motor acceleration and deceleration is built into the chip
speed levels: 14 or 27. By coincidence, chips understanding Motorola 2 provide 27 speed steps.
reverse lock: if yes, at speeds above 6 (of the range 1 - 14) a direction change signalled in Motorola 1 is ignored.
use: the decoders where this chip has been used

Motorola MC145027

chip number: Motorola MC145027
case: DIL16 or SO16
analog detection: no
signal inversion: not tolerated
signal format: Motorola 1
aux. function f0: yes
ext. functions f1 - f4: yes, but in outdated Motorola 1 format
internal motor driver: no
internal motor control: no
internal accel./decel.: no
speed levels: 14
reverse lock: no
use: 6083, 6084, accessory decoder, early function decoder

Zymos M60349
chip number: Zymos M60349 40126A
case: DIL16
analog detection: yes
signal inversion: not tolerated
signal format: Motorola 1, tolerates Motorola 2
aux. function f0: yes
ext. functions f1 - f4: no
internal motor driver: no
internal motor control: no
internal accel./decel.: no
speed levels: 14
reverse lock: no
use: 6080, 6081

LME03
chip number: LME03 50265 "Lenz märklin Electronics"
case: SO20
analog detection: yes
signal inversion: not tolerated
signal format: Motorola 1, ignores Motorola 2
aux. function f0: yes
ext. functions f1 - f4: no
internal motor driver: no
internal motor control: no
internal accel./decel.: no
speed levels: 14
reverse lock: no
use: 6080, 6081

701.13
chip number: 701.13 50250
701.13B 1301
701.13B 1302
701.13B 1304
case: SO16
analog detection: yes
signal inversion: tolerated
signal format: Motorola 1, tolerates Motorola 2
aux. function f0: yes; off in analog
ext. functions f1 - f4: no
internal motor driver: no
internal motor control: no
internal accel./decel.: no
speed levels: 14
reverse lock: yes
use: 6603, 6080, 6081, 6090

701.17
chip number: 701.17 50280
701.17B 50281
case: SO16
analog detection: yes
signal inversion: tolerated
signal format: Motorola 2
aux. function f0: yes
ext. functions f1 - f4: yes, via shift register output
internal motor driver: no
internal motor control: no
internal accel./decel.: no
speed levels: 27
reverse lock: yes
use: 6603, 6095

701.21
chip number: 701.21
701.21B 502940
case: SO16
analog detection: no
signal inversion: tolerated
signal format: Motorola 2
aux. function f0: permanently on, protected to 100 mA each direction
ext. functions f1 - f4: no, but an additional function (protected to 250 mA, e. g. for telex couplers) is available that is activated by repeated direction reversals
internal motor driver: yes, protected to 800 mA
internal motor control: no
internal accel./decel.: no
speed levels: 27
reverse lock: no
use: 66031

701.22
chip number: 701.22A 50290
701.22B 50290
case: SO28
analog detection: yes
signal inversion: tolerated
signal format: Motorola 2
aux. function f0: yes, protected; on in analog
ext. functions f1 - f4: yes; f1 is on, f2 - f4 are off in analog. In function decoder mode protected to 500 mA (f1, f2) or 200 mA (f3, f4)
internal motor driver: yes, protected to 800 mA
internal motor control: yes
internal accel./decel.: yes, can be deactivated by f4
speed levels: 27
reverse lock: no
use: 60902, 60960

701.40
chip number: 701.40A 502701
case: SO28
analog detection: yes
signal inversion: tolerated
signal format: Motorola 2
aux. function f0: yes, overload and short circuit protected
ext. functions f1 - f4: yes
internal motor driver: yes, for brushless C-Sinus motor
internal motor control: yes
internal accel./decel.: yes, can be deactivated by f4
speed levels: 27
reverse lock: no
use: SINUS motor

701.43
chip number: 701.43A 502950
case: SO28
analog detection: yes
signal inversion: tolerated
signal format: Motorola 2
aux. function f0: yes, overload and short circuit protected
ext. functions f1 - f4: no
internal motor driver: no
internal motor control: no
internal accel./decel.: no
speed levels: 27
reverse lock: no
use: 66032

References, Links

Above information has been collected from my own experiments as well as from the following webpages:



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last update: 2004-02-21; webmaster(at)bogobit.de