8 Application Information

8.1 Typical Application—CC330xMOD Reference Design

RF SECTION

Standby/Operation

1

+Vs

4

Output

3

GND

2

Y2

LFSPXO073707REEL

SLOW_CLK_IN_1V8

GND

i

50Ohm

GND

GND

L1

L2

E1

M830520

GND

GND

RF_OUT

VCC_BRD_1V8

C0G/NP0

0201

10pF

C18

EXTERNAL SLOW CLOCK

(op onal)

CC33X1MOD TARGET

3V3_IN

37

3V3_IN

38

SDIO_CLK

3

SDIO_CMD

4

SDIO_D0

8

SDIO_D1

7

SDIO_D2

6

SDIO_D3

5

Host_IRQ_BLE

11

Host_IRQ_WL

10

COEX_GRANT

47

COEX_PRIORITY

45

COEX_REQ

46

UART_CTS

49

UART_RTS

48

UART_RX

50

UART_TX

51

1V8_IN

53

1V8_IN

54

Reset

17

ANT_SEL

52

Logger

9

RF_OUT

23

SLOW_CLK_IN

18

SWCLK

13

SWDIO

12

VPP_IN

19

GND

1

GND

2

GND

14

GND

15

GND

16

GND

20

GND

21

GND

22

GND

24

GND

25

GND

26

GND

27

GND

28

GND

29

GND

30

GND

31

GND

32

GND

33

GND

34

GND

35

GND

36

GND

39

GND

40

GND

41

GND

42

GND

43

GND

44

GND

55

GND

56

GND

57

GND

58

GND

59

GND

60

GND

61

GND

62

GND

63

GND

64

GND

65

CC33x1MODENIAMOZR

GND

SDIO_CLK_1V8

SDIO_CMD_1V8

SDIO_D0_1V8

SDIO_D1_1V8

SDIO_D2_1V8

SDIO_D3_1V8

LOGGER_1V8

IRQ_WL_1V8

IRQ_BLE_1V8

SWDIO

SWCLK

RESET_1V8

SLOW_CLK_IN_1V8

ANT_SEL_1V8

UART_TX_1V8

UART_RX_1V8

UART_CTS_1V8

UART_RTS_1V8

COEX_GRANT_1V8

COEX_REQ_1V8

COEX_PRIORITY_1V8

i

50Ohm

RF_OUT

VBAT_CC_1V8

VBAT_CC_3V3

VBAT_CC_1V8

Figure 8-1. CC330xMOD Reference Schematics

8.2 Design Recommendations

This section describes the layout recommendations for the CC330xMOD module, RF trace, and antenna.

Table 8-1 summarizes the layout recommendations.

Table 8-1. Layout Recommendations Summary

ITEM

DESCRIPTION

Thermal

1

The proximity of ground vias must be close to the pad.

2

Signal traces must not be run underneath the module on the layer where the module is mounted.

3

Have a complete ground pour in layer 2 for thermal dissipation.

4

Have a solid ground plane and ground vias under the module for a stable system and thermal dissipation.

5

Increase the ground pour in the first layer and have all of the traces from the first layer on the inner layers, if possible.

6

Signal traces can be run on a third layer under the solid ground layer, which is below the module mounting layer.

RF Trace and Antenna Routing

7

The RF trace antenna feed must be as short as possible beyond the ground reference. At this point, the trace starts to radiate.

8

The RF trace bends must be gradual, with an approximate maximum bend of 45° with trace mitered. RF traces must not have

sharp corners.

9

RF traces must have via stitching on the ground plane beside the RF trace on both sides.

10

RF traces must have constant impedance (microstrip transmission line).

CC3300MOD, CC3301MOD

SWRS333A – JULY 2025 – REVISED AUGUST 2025

www.ti.com

24

Submit Document Feedback

Copyright © 2025 Texas Instruments Incorporated

Product Folder Links: CC3300MOD CC3301MOD