Datasheet
TMC429 DATASHEET (v. 1.07 / 2012-AUG-01) 8
Copyright © 2010-2012, TRINAMIC Motion Control GmbH & Co. KG
Different sets of additional signals of the TMC429 are available for the diferent package varians of it.
Please refer Figure 5-1: TMC429 pin out, page 8, and Table 5-1: TMC429 , page 9. Please refer this
figure and this table concerning the pins 1, 12, 13, 24 of the SOP24 package.
Hint: Preferably, long wires to the reference switch inputs (REF1, REF2, and REF3) should be
avoided. For long wires, a low pass filter for spike suppression should be provided (pls. refer the
TMC429 evaluation board schematic as an example).
TMC 429-PI24
V33
nSCS_C
GND
SDI_C
TEST
V5
SCK_C
SDI_S_D2
nINT_SDO_C
CLK
nSCS_S_S2
REF2
REF1
REF3
SCK_S_D1
SDO_S_S1
3
4
5
6
7
8
9
10
23
15
16
17
20
21
22
14
1
2
11
12
24
13
18
nSCS2_S3
19
nSCS3_D3
SOP24 (300 MILS)
V5
GND
REFR1 [n.c. @ TMC428]
REFR2 [n.c. @ TMC428]
[n.c. @ TMC428] POSCMP
[n.c. @ TMC428] SDOZ_C
TMC429-I
V33
nSCS_C
GND
SDI_C
TEST V5
SCK_C
SDI_S_D2
nINT_SDO_C
CLK nSCS_S_S2
REF2
REF1
REF3
SCK_S_D1
SDO_S_S1
1
2
3
4
5
6
7
8
16
10
11
12
13
14
15
9
SSOP16 (150 MILS)
TMC429-LI
nSCS_C
TEST
SCK_C
CLK
REF2
REF3
3
4
5
6
7
8
9
1
2
QFN32 5x5mm
V5
GND
n.c.
10 11 12 13 14 15 16
32 31 30 29 28 27 26 25
22
21
20
19
18
17
24
23
REF1
n.c.
SDI_C
n.c.
SDOZ_C
REFR2
nINT_SDO_C
SDO_S_S1
n.c.
SCK_S_D1
nSCS_S_S2
nSCS2_S3
nSCS3_D3
V5
V33
GND
n.c.
SDI_S_D2
REFR1
REFR3
POSCMP
GND
n.c.
Figure 5-1: TMC429 pin out
Important Hint: To replace a TMC428 in SOP24 package by a TMC429 in SOP24 package on an
existing PCB, the pin 1 needs to be open, because it is an output for the TMC429 in SOP24 package.
The TMC428-I in SSOP16 can by replanced by a TMC429-I without restrictions.