User's Manual

USER MANUA

V0.82

TCM 300 / 300C / 320 / 320C

3 .9 Backw a rd com pa t ibilit y t o TCM 2 2 0 C

In Mode 0 TCM 320C is backward compatible to its predecessor TCM 220C.

There are a few minor restrictions of compatibility which are listed here:

Pa r a m eter TCM

2 2 0 C

TCM 3 2 0 C

Maximum current consumption 34 mA 43 mA

Maximum output current of outputs 25 mA 2 mA

(external driver transistor may be needed)

Thickness of module 4.6 mm 5.5 mm

Maximum voltage rating at pin7

(TCM 320C: ADIO6; TCM 220C: IN_5)

6 V 3.6 V

Minimum HIGH voltage level

at input pins

1.55 V 2.0 V

Post master function for systems with

smart acknowledge

No Yes, 15 mail boxes

3 .1 0 Using RVDD

If RVDD is used in an application circuit a serial ferrite bead shall be used and wire length

should be as short as possible (<3 cm). The following ferrite beads have been tested:

74279266 (0603), 74279205 (0805) from Würth. During radio transmission and reception

only small currents may be drawn (I<100 µA).

Pulsed current drawn from RVDD has to be avoided. If pulsed currents are necessary, suffi-

cient blocking has to be provided.