SI4438-B1C-FMR datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Wireless rf/communication> Telecom circuit> SI4438-B1C-FMR

SI4438-B1C-FMR: DescriptionIC RF TXRX+MCU ISM<1GHZ 20-VFQFN; CategoryWireless rf/communication Telecom circuit; File Size1MB，44 Pages; ManufacturerSilicon Laboratories Inc; Environmental Compliance

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SI4438-B1C-FMR Overview

IC RF TXRX+MCU ISM<1GHZ 20-VFQFN

SI4438-B1C-FMR Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
package instruction	LEAD FREE, MO-220VGGD-8, QFN-20
Reach Compliance Code	compliant
JESD-30 code	S-XQCC-N20
length	4 mm
Number of functions	1
Number of terminals	20
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Maximum seat height	0.9 mm
Nominal supply voltage	3.3 V
surface mount	YES
Telecom integrated circuit types	TELECOM CIRCUIT
Temperature level	INDUSTRIAL
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
width	4 mm
Base Number Matches	1

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Si4438

I G H

- P

ERFORMANCE

, L

O W

-C

U R R E N T

RANSCEIVER

Features

Frequency



Excellent selectivity performance

range = 425–525 MHz



58 dB adjacent channel



75 dB blocking at 1 MHz



Receive sensitivity = –124 dBm



Antenna diversity and T/R switch



Modulation

control



(G)FSK



Highly configurable packet handler



OOK



Max output power



TX and RX 64 byte FIFOs



+20 dBm



Auto frequency control (AFC)



Low active power consumption



Automatic gain control (AGC)



14 mA RX



Low BOM



Ultra low current powerdown



Low battery detector

modes



Temperature sensor



30 nA shutdown, 50 nA standby



20-Pin QFN package



Data rate = 100 bps to 500 kbps



IEEE 802.15.4g ready



Fast wake and hop times



China regulatory



Power supply = 1.8 to 3.6 V



Pin Assignments

GPIO3

GPIO2

XOUT

15 nSEL

14 SDI

13 SDO

12 SCLK

TXRamp

VDD

GPIO0

10 11 nIRQ

GPIO1

GND

XIN

SDN

20 19 18 17 16

RXp 2

RXn 3

TX 4

NC 5

Applications



China smart meters

GND

PAD

Description

Silicon Laboratories' Si4438 is a high-performance, low-current

transceivers covering the sub-GHz frequency bands from 425 to

525 MHz. The Si4438 is targeted at the Chinese smart meter market and

is especially suited for electric meters. This device is footprint- and

pin-compatible with the Si446x radios, which provide industry-leading

performance for worldwide sub-GHz applications. The radios are part of

the EZRadioPRO

family, which includes a complete line of transmitters,

receivers, and transceivers covering a wide range of applications. All

parts offer outstanding sensitivity of –124 dBm while achieving extremely

low active and standby current consumption. The 58 dB adjacent channel

selectivity with 12.5 kHz channel spacing ensures robust receive

operation in harsh RF conditions. The Si4438 offers exceptional output

power of up to +20 dBm with outstanding TX efficiency. The high output

power and sensitivity results in an industry-leading link budget of 144 dB

allowing extended ranges and highly robust communication links.

VDD

Patents pending

Rev 1.0 6/14

Si4438

Si4438

ABLE

Section

ONTENTS

Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3. Controller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.1. Serial Peripheral Interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.2. Fast Response Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.3. Operating Modes and Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.4. Application Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.5. Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.6. GPIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4. Modulation and Hardware Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1. Modulation Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.2. Hardware Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.3. Preamble Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5. Internal Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.1. RX Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.2. RX Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5.3. Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

5.4. Transmitter (TX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

5.5. Crystal Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

6. Data Handling and Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

6.1. RX and TX FIFOs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.2. Packet Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7. RX Modem Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8. Auxiliary Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.1. Wake-up Timer and 32 kHz Clock Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.2. Low Duty Cycle Mode (Auto RX Wake-Up) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

8.3. Temperature, Battery Voltage, and Auxiliary ADC . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.4. Low Battery Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

8.5. Antenna Diversity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9. Pin Descriptions: Si4438 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

10. Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

11. Package Outline: Si4438 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

12. PCB Land Pattern: Si4438 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

13. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

13.1. Si4438 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

13.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Rev 1.0

SI4438-B1C-FMR Related Products

	SI4438-B1C-FMR
Description	IC RF TXRX+MCU ISM<1GHZ 20-VFQFN
Is it Rohs certified?	conform to
package instruction	LEAD FREE, MO-220VGGD-8, QFN-20
Reach Compliance Code	compliant
JESD-30 code	S-XQCC-N20
length	4 mm
Number of functions	1
Number of terminals	20
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Maximum seat height	0.9 mm
Nominal supply voltage	3.3 V
surface mount	YES
Telecom integrated circuit types	TELECOM CIRCUIT
Temperature level	INDUSTRIAL
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
width	4 mm
Base Number Matches	1

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