Deep Dive Report
Samsung Gear 2 Neo SM-R381
Bluetooth 4.0 LE + EDR
Report #17000-140423-MKc
Product Description
The Samsung Gear 2 Neo is a low-energy Bluetooth
4.0-enabled smartwatch that’s resistant to both dust
and water (IP67 certified). Besides the supporting
functions of a normal wristwatch, it can also receive
notifications and applet content when paired with a
smartphone via a Bluetooth connection. A built-in heart
rate sensor allows it to track and record the user’s heart
rate, while the built-in pedometer logs the numbers of
steps taken during a workup routine. There’s also a 6axis accelerometer and gyroscope. All notifications,
time, and activity information are displayed on a 1.63in. Super AMOLED display with 320 x 320 resolution,
16M colors, and capacitive touchscreen for easily
navigating through various screens. Connectivity
includes Bluetooth 4.0 LE + EDR; microUSB (for battery
charging); IrLED, which allows the user to remotely
control other devices; and FM radio. The Gear 2 Neo
runs the open-source Tizen wearable platform (a Linuxbased OS) on a 1 GHz dual-core Samsung Exynos 3250
application processor. Other features include 4 GB of
internal memory, vibrational alerts, and a built-in music
player that connects to Bluetooth headsets. The Gear 2
Neo is powered by a 3.8 V, 300 mAh Li-Polymer battery
that supplies up to 48 hours of use time, and 144 hours
standby time. It also comes with a USB AC adapter and
docking station for charging.
DISCLAIMER: All company names, product names, and service names mentioned are used for identification purposes only and may be registered trademarks, trademarks, or service marks of their respective owners. All
analyses are done without participation, authorization, or endorsement of the manufacturer. Any cost analyses presented in this material are estimates prepared by TechInsights from generally available data. While
TechInsights believes that these estimates reflect the probable costs, the actual producer did not supply the data, and therefore the actual costs may be different from these estimates. Furthermore, TechInsights extends
no warranties with respect to any information in this document, and shall bear no liability whatsoever for the use of the information.
Copyright © 2014, TechInsights. All rights reserved. Do not reproduce, distribute, disseminate, photocopy, fax, transmit, download to a shared database, or otherwise copy, transfer, sell, publish, or send this material, or
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Block Diagram
Antenna
16 - Melfas
#MCS-8000
Capacitive Touchscreen
Controller
12 – Murata ?*
#2343E8 ?
WiFi 802.11a/b/g/n / Bluetooth /
FM Radio Module
*Broadcom BCM43342 inside
15 - Samsung
#Unknown
AMOLED Display Driver
2 - Samsung
#KMF5X0005M
Multichip Memory - 512 MB Mobile
LPDDR3 SDRAM, 4 GB MLC
NAND Flash, Memory Controller
Dock Station
5 - Maxim
#MAX77836
microUSB Interface Controller
+ Li-Ion Battery Charger
1 - Samsung
#Exynos 3250
Dual-Core Application Processor
Package on Package
9 - STMicroelectronics
#STM32F401xB
ARM Cortex-M4 32-Bit Microcontroller
3 - Samsung
#S2MPS14 ?
Power Management
14 - Invensense
#MPU-6500
6-Axis MEMS Gyroscope &
Accelerometer
8 - Analog Devices
#Unknown
Heart Rate Sensor
13 - Yamaha
#YMU831
Audio Hub / CODEC Amplifier
Speaker
? = Unconfirmed
Copyright © 2014, TechInsights
17 - Unknown
#421E14M3
Battery Protection
Microphone
Estimated block diagram based on observation of this specific product implementation, manufacturer’s
data sheets where available, and best engineering judgment. Certain details of the interface circuitry
are not reflected in this block diagram. Partitioning and connectivity are speculative.
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 2
Component Arrangement
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 3
Main Board (Side 1 IC Identification)
4 - STMicroelectronics
#STOD32W
100mA Triple DC-DC Converter for
AMOLED Display
5 - Maxim
#MAX77836
microUSB Interface Controller + Li-Ion Battery Charger
3 - Samsung
#S2MPS14
Power Management ?
6 - Maxim
#MAX14655EWC+T
Overvoltage Protection
7 - Ricoh
#RP104K181D
150 mA LDO Regulator
8 - Analog Devices
#Unknown
Heart Rate Sensor (2-Die Pkg.)
1 - Samsung
#Exynos 3250
Dual-Core Application Processor
9 - STMicroelectronics
#STM32F401xB
ARM Cortex-M4 32-Bit Microcontroller
2 - Samsung
#KMF5X0005M
Multichip Memory - 512 MB Mobile
LPDDR3 SDRAM, 4 GB MLC NAND
Flash, Memory Controller
(3-Die Pkg.)
10 - Texas Instruments
#TPS61256
5V Step-Up DC-DC Converter
11 - Lattice Semiconductor
#iCE40LP640
FPGA
? = Unconfirmed
Grid = 1 cm
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 4
Main Board (Side 1 X-Rays)
2.3 - Samsung
#K4E4E324ED
LPDDR3 SDRAM Memory - 512 MB
Die Size: 6.54 x 6.1 mm
2.1 - Samsung
#S4LL 153X01
Memory Controller
Die Size: 3.07 x 1.25 mm
2.2 - Samsung
#K9ABGD8U0D
MLC NAND Flash Memory - 4 GB
Die Size: 7.54 x 6.66 mm
2 - Samsung
#KMF5X0005M
Multichip Memory - 512 MB Mobile LPDDR3
SDRAM, 4 GB MLC NAND Flash,
Memory Controller (3-Die Pkg.)
Pkg Size: 10 x 9.97 mm
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 5
Main Board (Side 2)
Display/Touchscreen
Battery
Grid = 1 cm
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 6
Main Board (Side 2 IC Identification)
14 - Invensense
#MPU-6500
6-Axis MEMS Gyroscope & Accelerometer
12 - Murata ?*
#2343E8 ?
WiFi 802.11a/b/g/n / Bluetooth /
FM Radio Module (4-Die Pkg.)
*Broadcom BCM43342 inside
13 - Yamaha
#YMU831
Audio Hub / CODEC Amplifier
(2-Die Pkg.)
? = Unconfirmed
Grid = 1 cm
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 7
Main Board (Side 2 X-Rays)
12 - Murata ?
#2343E8 ?
WiFi 802.11a/b/g/n / Bluetooth / FM Radio Module (4-Die Pkg.)
Pkg Size: 6.2 x 5.5 mm
12.1 - Unknown
#Unknown
RF Power Amplifier
Die Size: 0.96 x 0.55 mm
12.2 - Unknown
#A03
Antenna Switch w/ LNA
Die Size: 0.94 x 0.73 mm
12.4 - Broadcom
#BCM43342
WiFi 802.11a/b/g/n / Bluetooth / FM Radio
Die Size: 4.49 x 4.11 mm
12.3 - Unknown
#Unknown
Bias Control ?
Die Size: 0.5 x 0.5 mm
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 8
Main Board (Side 2 Die Photos & X-Rays)
12 - Murata ?
#2343E8 ?
WiFi 802.11a/b/g/n / Bluetooth / FM Radio Module (4-Die Pkg.)
Pkg Size: 6.2 x 5.5 mm
12.1 - Unknown
#Unknown
RF Power Amplifier
Die Size: 0.96 x 0.55 mm
12.2 - Unknown
#A03
Antenna Switch w/ LNA
Die Size: 0.94 x 0.73 mm
12.4 - Broadcom
#BCM43342
WiFi 802.11a/b/g/n / Bluetooth / FM Radio
Die Size: 4.49 x 4.11 mm
12.3 - Unknown
#Unknown
Bias Control ?
Die Size: 0.5 x 0.5 mm
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Samsung Gear 2 Neo SM-R381 #17000-140423-MKc - Page 9