AcSiP Confidential
Product Name
Version
Doc No
Date
AI7681H
MT7681
802.11b/g/n IOT Module
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901-06201
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May 19
, 2015
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AcSiP Confidential
Document History
Date Revised Contents Revised By Version
Dec 9th ,2014
Feb 6
Apr 17
th
,2015
th
,2015
May 19
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,2015
Initial Version
Change Document Format & Specification
Change Mechanical Dimensions & Product
Marking
Change Product Marking for FCC & CE
Kidd
Kidd
Kidd
Kidd
A
B
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Product Name
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AI7681H
MT7681
802.11b/g/n IOT Module
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901-06201
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INDEX
1. Description .................................................................................................................................................3
1-1. Block Diagram ...........................................................................................................................................4
1-2. Specification ..............................................................................................................................................4
2. Electrical Characteristics ...........................................................................................................................5
2-1. Absolute Maximum Ratings ......................................................................................................................5
2-2. Recommended Operating Range ...............................................................................................................5
2-3. DC Characteristics .....................................................................................................................................5
2-4. RF Characteristics ......................................................................................................................................6
3. Pin Definition .............................................................................................................................................8
3-1. Pin Description...........................................................................................................................................8
3-2. Pin Assignment and Footprint ....................................................................................................................9
3-3. Mechanical Dimensions ...........................................................................................................................10
4. Recommended Reflow Profile ................................................................................................................. 11
5. Module Preparation ..................................................................................................................................12
5-1. Handling ...................................................................................................................................................12
5-2. SMT Preparation ......................................................................................................................................12
6. Package Information ................................................................................................................................13
6-1 Product Marking ......................................................................................................................................13
6-2 Tray Dimension ........................................................................................................................................14
6-3 Packing Information.................................................................................................................................15
6-4 Humidity Indicator Card ..........................................................................................................................15
Product Name
Version
Doc No
AI7681H
MT7681
802.11b/g/n IOT Module
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901-06201
May 19
Date
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1. Description
AcSiP Technology Corp. introduces a low-cost and low-power consumption IOT module, AI7681H. The
AI7681H integrate Wi-Fi single chip, which supports IEEE 802.11b/g/n stream, providing GPIO for intelligent
control, and UART interfaces for device communication.
The AI7681H integrate chip antenna and 8Mbits flash to reduce customer platform size. And also integrate
power manage unit for single 3.3V power source for cost effective design.
The AI7681H embedded 32-bit RISC MCU for 802.11b/g/n drivers, supplicant, TCP/IP protocol stack, and
networking applications, can be operated in station mode and softAP mode. The AI7681H is an ideal solution for
embedded device to enable networking service with minimized design effort.
Feature
Small footprint：18 mm x 15 mm x 1.7 mm
Single stream IEEE 802.11 b/g/n
32-bit RISC microprocessor as the host MCU
Embedded IEEE 802.11 b/g/n drivers, supplicant, and TCP/IP stack
Highly integrated RF PA, LNA, and RF switch
Integrate chip antenna and 8Mbits flash
Integrate high efficiency switching regulator for single 3.3V power source
Security support for WFA WPA/WPA2 personal, WPS2.0, WAPI
Operation in station mode or softAP mode
Rich interfaces, UART and GPIOs
RoHS & Halogen free compliant / Lead free
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AI7681H
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802.11b/g/n IOT Module
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1-1. Block Diagram
AcSiP Confidential
A simplified block diagram of the AI7681H IOT module is depicted in the figure below.
1-2. Specification
Model Name AI7681H
Product Description IOT Module
Network Standard
Host Interface UART / GPIO[0..4]
Operation Conditions
Temperature
Humidity
Dimension 18 mm x 15 mm x 1.7 mm
Package LGA
Station mode：IEEE 802.11b/g/n
AP mode：IEEE 802.11b/g
Storage：-40℃ ~ +85℃
Operating：-10℃ ~ +70℃
Operating：10 ~ 95% (Non-Condensing)
Storage：5 ~ 95% (Non-Condensing)
Product Name
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AI7681H
MT7681
802.11b/g/n IOT Module
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901-06201
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2. Electrical Characteristics
AcSiP Confidential
2-1. Absolute Maximum Ratings
Symbol Parameter Min. Typ. Max. Unit
3.3VD Supply Voltage -0.3 3.3 3.6 V
3.3VD_RF Supply Voltage (RF) -0.3 3.3 3.6 V
2-2. Recommended Operating Range
Symbol Parameter Min. Typ. Max. Unit
3.3VD Supply Voltage 2.97 3.3 3.63 V
3.3VD_RF Supply Voltage (RF) 2.97 3.3 3.63 V
2-3. DC Characteristics
Symbol Parameter Conditions Min. Max. Unit
VIL Input Low Voltage LVTTL -0.28 0.6 V
VIH Input High Voltage 2.0 3.63 V
VOL Output Low Voltage
VOH Output High Voltage
RPU Input Pull-Up Resistance PU=High, PD=Low 40 190
PRD Input Pull-Down Resistance PU=Low, PD=High 40 190
︱IOL︱= 1.6~14mA
︱IOH︱= 1.6~14mA
-0.28 0.4 V
2.4 VDD+0.33 V
KΩ
KΩ
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802.11b/g/n IOT Module
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2-4. RF Characteristics
AcSiP Confidential
2-4-1. RF Characteristics for 802.11b
802.11b Transmit (Conductive)
Item Condition Min. Typ. Max. Unit
Frequency Range Channel 1 Channel 13
Tx Power Level DQPSK 14 16 18 dBm
Frequency Tolerance -10 0 10 ppm
11MHz→22MHz 40 dBr
Spectral Mask
Modulation Accuracy All Data Rate 15 %
Item Condition Min. Typ. Max. Unit
Frequency Range Channel 1 Channel 13
＞22MHz
802.11b Receiver (Conductive)
53 dBr
Min. Input 11Mbps PER<8% -86 dBm
Max. Input Level PER<8% 0 dBm
2-4-2. RF Characteristics for 802.11g
802.11g Transmit (Conductive)
Item Condition Min. Typ. Max. Unit
Frequency Range Channel 1 Channel 13
Tx Power Level OFDM 12 14 16 dBm
Frequency Tolerance -10 0 10 ppm
Modulation Accuracy All data rate -28 -30 dB
802.11g Receiver (Conductive)
Item Condition Min. Typ. Max. Unit
Frequency Range Channel 1 Channel 13
Min. Input 54Mbps PER<10% -74
Max. Input Level PER<10% -3.0 dBm
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2-4-3. RF Characteristics for 802.11n (2.4GHz)
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802.11n_HT20 Transmit (Conductive)
Item Condition Min. Typ. Max. Unit
Frequency range Channel 1 Channel 13
Tx Power Level OFDM 12 14 16 dBm
Frequency Tolerance -10 0 10 ppm
Modulation Accuracy All Data Rate -28 -30 dB
802.11n_HT40 Transmit (Conductive)
Item Condition Min. Typ. Max. Unit
Frequency range Channel 3 Channel 11
Tx Power Level OFDM 12 14 16 dBm
Frequency Tolerance -10 0 10 ppm
Modulation Accuracy All Data Rate -28 -30 dB
802.11n_HT20 Receiver (Conductive)
Item Condition Min. Typ. Max. Unit
Frequency Range Channel 1 Channel 13
Min. Input MCS7 PER<10% -71 dBm
Max. Input Level PER<10% -3.0 dBm
802.11n_HT40 Receiver (Conductive)
Item Condition Min. Typ. Max. Unit
Frequency range Channel 3 Channel 11
Min. Input MCS7 PER<10% -68 dBm
Max. Input Level PER<10% -3.0 dBm
2-5. WLAN Current Consumption
Description
Typ. Unit
Sleep Mode 1.1 mA
RX Active, HT40, MCS7 151 mA
RX Power Saving, DTIM=1 15 mA
Performance
RX Listen 6 mA
TX HT40, MCS7 @ +15dBm 210 mA
TX CCK, 11Mbps @ +19dBm 242 mA
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AI7681H
MT7681
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901-06201
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3. Pin Definition
AcSiP Confidential
3-1. Pin Description
Pin Definition I/O Description
1 GND VSS Ground Pin
2 GND VSS Ground Pin
3 GND VSS Ground Pin
4 3.3VD VDD Power Supply
5 GND VSS Ground Pin
6 GND VSS Ground Pin
7 GND VSS Ground Pin
8 RST_N I
9 GND VSS Ground Pin
10 UART_RX I RX Pin of UART Interface
11 UART_TX O TX Pin of UART Interface
12 GND VSS Ground Pin
13 GPIO4 I/O Programmable Input / Output
14 GPIO3 I/O Programmable Input / Output
15 GPIO2 I/O Programmable Input / Output
16 GPIO1 I/O Programmable Input / Output
17 GPIO0 I/O Programmable Input / Output
18 GND VSS Ground Pin
19 NC
20 NC
21 NC
22 NC
External System Reset (Low：Active)
23 GND VSS Ground Pin
24 3.3VD_RF VDD Power Supply
25 GND VSS Ground Pin
26 GND VSS Ground Pin
27 GND VSS Ground Pin
28~31 ePAD VSS Ground Pin
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3-2. Pin Assignment and Footprint
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Doc No
AI7681H
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802.11b/g/n IOT Module
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3-3. Mechanical Dimensions
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Version
Doc No
Date
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4. Recommended Reflow Profile
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Product Name
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Doc No
AI7681H
MT7681
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5. Module Preparation
5-1. Handling
Handling the module must wear the anti-static wrist strap to avoid ESD damage. After each module is aligned and
tested, it should be transport and storage with anti -static tray and packing. This protective package must be
remained in suitable environment until the module is assembled and soldered onto the main board.
Base on reliability test result pass MRT L3 criteria, AI7681H refer to MSL3 criterion.
5-2. SMT Preparation
1. Calculated shelf life in sealed bag: 6 months at <40 degree and <90% relative humidity (RH).
2. Peak package body temperature: 250 degree.
3. After bag was opened, devices that will be subjected to reflow solder or other high temperature process
must.
A. Mounted within: 168 hours of factory conditions <30 degree / 60% RH.
B. Stored at
4. Devices require baking, before mounting, if:
A. Package bag does not keep in vacuumed while first time open.
B. Humidity Indicator Card is >10% when read at 23 ± 5 degree.
C. Expose at 3A condition over 8 hours or Expose at 3B condition over 24 hours.
5. If baking is required, devices may be baked for 12 hours at 125 ± 5 degree.
≦
10% RH with N2 flow box.
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AI7681H
MT7681
802.11b/g/n IOT Module
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901-06201
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6. Package Information
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6-1 Product Marking
Product Name
Version
Doc No
Date
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AI7681H
MT7681
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6-2 Tray Dimension
AcSiP Confidential
Product Name
Version
Doc No
AI7681H
MT7681
802.11b/g/n IOT Module
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6-3 Packing Information
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6-4 Humidity Indicator Card
Indicates 指示點：
5%, 10%, 60% relative humidity
5%, 10%, 60% 相對濕度
Color Change 顏色變化：
Brown（Dry）→ Blue（Wet）
棕色（乾燥）→ 藍色（潮濕）
Dry（乾燥） Wet（潮濕）
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Version
Doc No
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AI7681H
MT7681
802.11b/g/n IOT Module
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Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following
measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate this equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
IMPORTANT NOTE:
Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Country Code selection feature to be disabled for products marketed to the US/CANADA
This device is intended only for OEM integrators under the following conditions:
1) The antenna must be installed such that 20 cm is maintained between the antenna and users, and
2) The transmitter module may not be co-located with any other transmitter or antenna,
3) For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G band by
supplied firmware programming tool. OEM shall not supply any tool or info to the end-user regarding to
Regulatory Domain change.
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Version
Doc No
AI7681H
MT7681
802.11b/g/n IOT Module
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901-06201
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As long as 3 conditions above are met, further transmitter test will not be required. However, the OEM integrator
is still responsible for testing their end-product for any additional compliance requirements required with this
module installed
IMPORTANT NOTE
In the event that these conditions cannot be met (for example certain laptop configurations or co-location with
another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on
the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end
product (including the transmitter) and obtaining a separate FCC authorization.
End Product Labeling
This transmitter module is authorized only for use in device where the antenna may be installed such that 20 cm
may be maintained between the antenna and users. The final end product must be labeled in a visible area with
the following: “Contains FCC ID: 2ADWC-AI7681H”.
Manual Information to the End User
The OEM integrator has to be aware not to provide information to the end user regarding how to install or
remove this RF module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning as show in this manual.
Product Name
Version
Doc No
AI7681H
MT7681
802.11b/g/n IOT Module
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901-06201
May 19
Date
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