Data Sheet for the LTD-VL3020

Product: LTE Wireless Modem

Model name: LTD-VL3020

1. Overview

The LTD-VL3020 is a personal mobile communication device that incorporates the latest compact radio technology, including smaller and lighter components and support LTE Band 2, 4, 5, 13. This device acts as the vehicle's telematics system and connects to LTE wireless networks and wireless modules to allow voice and data communication. Furthermore, this device can operate on land and water as well as other similar areas.

In LTE mode (CAT4), the device provides uplink speeds of up to 50 Mbps and downlink speeds of up to 150 Mbps for seamless transfer of data such as movies and video calls. The device also supports the transfer of large amounts of data.

The device communicates with the host system via a standard RS-232 or USB port, and AT commands and control commands can be used to send data. Voice calls are also possible.

2. Major Features

Category	Details	Specification
Mechanical	Dimensions	34.0 x 40.0 x 3.5 mm (L x W x T) (Tolerance – width, length: ±0.15 / height: ±0.2)
	Weight	Max. 10.6 grams
	Interface	USB, general purpose I/O pins
Technology	Temperature*	Operation: -20 °C - +70 °C Storage: -40 °C - +85 °C
	Main chipset	MDM9628
	Memory	4Gb(NAND) / 2Gb(SDRAM)
	Standard (LTE)	DL Speed: 150 Mbps UL Speed: 50 Mbps
	Band	LTE B2, B4, B5, B13
ETC	Power	LTE: Typ. 23dBm (Power Class 3)
	DC power	4 V
	Functions	Voice, data, SMS

3. Interface

3.1 LGA Pad Layout (Top View)

The LGA Pad Layout is a detailed pin map. Due to its complexity, it is best represented by the pin descriptions provided in the following tables.

3.2 Pin Description

Antenna Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
C21	MAIN_ANT	Input/Output	RF Main Antenna
AC21	DIV_ANT	Input	RF Diversity Antenna
AE17	GNSS_ANT	Input	GNSS Antenna

User Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
H6	ACC_PWR_ON	Input	ACC_PWR_ON
I5	BOOT_OK	Output	BOOT_OK
H4	MSG	Output	MSG
G3	168H_END	Output	Remote standby mode end
F20	MAIN_ANT_DTC_EN	Output	Main ANT Detect Enable
Z20	DIV_ANT_DTC_EN	Output	Diversity ANT Detect Enable
I7	SPI_LEVEL_SHIFT_EN	Output	SPI LEVEL SHIFT Enable
AD4	ETHERNET_DCDC_ENABLE	Output	Ethernet power enable
F6	GPIO1	Input/Output	General purpose I/O
E5	GPIO2	Input/Output (Do not use with External PU)	General purpose I/O
L6	GPIO3	Input/Output (Not support INTERRUPT)	General purpose I/O
N6	GPIO4	Input/Output	General purpose I/O

ADC Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
E19	ADC1	Input	ADC Convertor input for main antenna detect
AA19	ADC2	Input	ADC Convertor input for diversity antenna detect

PCM Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
W3	PCM_EN	Output	PCM 3.3 Level Shifter Enable
X2	PCM_CLK	Input	PCM Clock
W1	PCM_SYNC	Input	PCM Frame Sync
Y3	PCM_DIN	Input	PCM Data In
Y1	PCM_DOUT	Output	PCM Data Out

JTAG Pin Description

PAD	NAME	DIRECTION	DESCRIPTION
AC7	MDM_JTAG_TMS	Input/Output	JTAG mode select input
AD8	MDM_JTAG_PS_HOLD	Input	JTAG PS HOLD detect
AD6	MDM_JTAG_TDI	Input	JTAG data input
AE7	MDM_JTAG_TRST_N	Input	JTAG reset for debug
AB6	MDM_JTAG_TDO	Output	JTAG debugging
AB8	MDM_JTAG_TCK	Input	JTAG clock input
AE9	MDM_JTAG_SRST_N	Input	JTAG reset

USB Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
N2	USB_HS_DM	Input/Output	USB high speed data (minus)
M1	USB_HS_DP	Input/Output	USB high speed data (plus)
K1	USB_VBUS	I	USB Power Supply
L2	USB_ID	Input	USB ID

SDIO Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
S1	SDC_CLK	Output	Secure digital controller clock
Q1	SDC_CMD	Output	Secure digital controller command
T2	SDC_DATA0	Input/Output	Secure digital controller data bit 0
R2	SDC_DATA1	Input/Output	Secure digital controller data bit 1
S3	SDC_DATA2	Input/Output	Secure digital controller data bit 2
Q3	SDC_DATA3	Input/Output	Secure digital controller data bit 3

SGMII Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
AA11	EPHY_RST_N or UIM2_RESET	Output	Ethernet PHY reset
AE11	EPHY_INT_N or UIM2_DETECT	Input	Ethernet PHY interrupt
AB10	SGMII_DATA or UIM2_CLK	Input/Output	SGMII input/Output data
AD10	GND		Ground
X10	SGMII_RX_P	Input	SGMII receive - plus
W11	SGMII_RX_M	Input	SGMII receive -minus
Z10	SGMII_TX_M	Output	SGMII transmit - plus
Y11	SGMII_TX_P	Output	SGMII transmit -minus
AC11	SGMII_CLK or UIM2_DATA	Output	SGMII clock

SPI Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
S5	SPI_MOSI	Output	SPI Serial Output
T6	SPI_CLK	Output	SPI Serial Clock
R6	SPI_CS_N	Output	SPI Chip Select
U5	SPI_MISO	Input	SPI Serial input
Q5	SPI_INTERRUPT	Input	MICOM → LGA SPI interrupt

UART Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
M5	UART2_TX	Output	UART2 Transmit data
N4	UART2_RX	Input	UART2 Receive data
K5	UART1_TX	Output	Debug UART5 Transmit Data
L4	UART1_RX	Input	Debug UART5 Receive Data
O5	UART3_TX	Output	UART6 Transmit data
P4	UART3_RX	Input	UART6 Receive data

USIM Interface Pads

PAD	NAME	DIRECTION	DESCRIPTION
I3	UIM1_PRESENT	Input	Detection of an external UIM card
H2	UIM1_CLK	Output	Clock Output to an external UIM card
E1	UIM1_RESET	Output	Reset Output to an external UIM card
G1	UIM1_DATA	Input/Output	Data connection with an external UIM card
F2	VREG_L6_UIM1	Output	Supply Output for an external UIM card
E3	GND		Ground
D2	GND		Ground
A1	GND		Ground
C1	GND		Ground
B2	GND		Ground

HSIC Pin Description

PAD	NAME	DIRECTION	DESCRIPTION
AB2	HSIC_DATA	Input/Output	HSIC data
AC1	HSIC_STB	Input/Output	HSIC Strobe signal
AD2	NC		No Connect
AE1	NC		No Connect

DSRC Pin Description

PAD	NAME	DIRECTION	DESCRIPTION
Y7	COEX_UART_RX	Input	LTE receiver sync for coexistence with UART
Z6	COEX_UART_TX	Output	LTE transmitter sync for coexistence with UART
X4	RFCLK2_QCA	Output	Low noise RF clock Output
AA3	NC	Output	No Connect

(Note: The tables above list various pin descriptions. The full set of GND pins is extensive and omitted for brevity in this transcription, but is available in the original document.)

3.3 USB

This device supports universal serial bus (USB) connections for high-speed data communication. The relevant hardware satisfies the USB 2.0 specifications and supports maximum communications speeds of 480 Mbps.

Pin NO.	Signal Name	Pin I/O (Modem host)	Function Description
M1	USB_D+	IO	USB Differential data line (+)
N2	USB_D-	IO	USB Differential data line (-)
K1	USB_VBUS	I	USB Power Supply

3.4 Audio

This module includes a PCM interface. The pull-up and pull-down resistors attached to these pins must provide more than 50 Kohm of resistance.

Pin NO.	Signal Name	Pin I/O (Modem host)	Function Description
W1	PCM_SYNC	I	PCM Interface sync
X2	PCM_CLK	I	PCM Interface clock
Y1	PCM_TXD	O	PCM Interface digital audio data out
Y3	PCM_RXD	I	PCM Interface digital audio data in

3.5 User Interface

Pin No.	Signal Name	Direction	Function
I5	BOOT_OK	O	Indicates that the Modem boot is complete.
C3	RESET_IN	I	Control line to unconditionally restart the module.
H4	MSG	O	Indicates that the Modem receive Urgent message.
G3	168H_END	O	Indicates that the 168hr sleep mode is end.
H6	ACC_ON_SLEEP	I	Control line to power on or 168hr sleep mode.
A3	Phone_ON	I	Control line to power on / off

4. Electrical Specifications

4.1 Power Supply Specifications

The host system provides the power supply (VPH_PWR) DC 4 V, 2.5 A to the device. The internal power supply module manages the power supplied to the integral circuits and maintains constant voltages. This module also controls each power block to minimize power consumption. In particular, the PAM (power amplifier module) consumes a lot of power, so it receives a direct power supply of 4 V from the VPH_PWR. Therefore the VPH_PWR signal inputs only the supply power of the PAM, even when the absolute rating is higher. In addition, the entire power input module blocks and protects against high surges and ESD in the NAD module.

Pin No.	Signal Name	Direction	MIN	TYP	MAX
A7,C7,B8,A9, B14,A15,B16, A17	VPH_PWR (for PAM / for PMIC)	I	3.9 V	4 V	4.1 V

4.2 Logic Level Specifications

4.2.1 Digital Logic Level Specifications

Signal Name	Type	Low		High		Unit
		Min	Max	Min	Max
BOOT_OK	O	0	0.45	1.35	1.8	V
RESET_IN	I	-0.3	0.63	1.17	1.8
MSG	O	0	0.45	1.35	1.8
96H_END	O	0	0.45	1.35	1.8
ACC_ON_SLEEP	I	0	0.63	1.17	1.8

5. RF Specifications

5.1 LTE

5.1.1 Receiver

Bandwidth: 3GPP TS 36.521-1 Table 5.4.2.1-1
Frequency: B2(1930~1990 MHz), B4(2110~2155 MHz), B5(869~894 MHz), B13(746~756 MHz)
Modulation method: QPSK, 16QAM and 64QAM
RX Sensitivity:
- B2, B5 (≤-94.3dBm @QPSK, BW: 10MHz)
- B4 (≤-96.3dBm @QPSK, BW: 10MHz)
- B13 (≤-93.3dBm @QPSK, BW: 10MHz)

5.1.2 Transmitter

Frequency: B2(1850~1910 MHz), B4(1710~1755 MHz), B5(824~849 MHz), B13(777~787 MHz)
Maximum RF Output: Power class 3, 20.3dBm ~ 25.7dBm max.
Modulation method: QPSK and 16QAM
Baseband to RF Direct conversion (Zero IF)

6. Mechanical Specifications

6.1 Environment Specifications

Storage temp.: -40 °C - +85 °C
Operating temp.: -20 °C - +70 °C
- (-20 °C - +70 °C : 3GPP specifications are satisfied)
- (-30 °C - -20 °C, +70 °C - +80 °C: May cause performance degradation)
Operating humidity: 80% (60°C) relative humidity

6.2 Mechanical Dimensions

Category	Specification
Dimensions	34.0 x 40.0 x 3.5 mm (L x W x T) (Tolerance – width, length: ±0.15 / height: ±0.2)
Weight	Max. 10.6 grams

Figure 2. Mechanical dimension: A diagram illustrating the physical dimensions of the module.

7. General Specifications

7.1 LTE (B2, B4, B5, B13)

試驗項目 (Test Item)	Spec.	Test Temperature	Frequency	TX Channel
				Low	Mid.	High
Maximum Output Power(class 3)	20.3~25.7dBm	Normal, Temp L, Temp H	Low, Mid, High	PASS	PASS	PASS
Frequency Error	±0.1 ppm	Normal, Temp L, Temp H	Low, Mid, High	PASS	PASS	PASS
Error Vector Magnitude(EVM)	12.5%↓ (16QAM, 50 RB)	Normal	Low, Mid, High	PASS	PASS	PASS
Relative Carrier Leakage Power	Carrier Leakage (3.2dBm ± 3.2dB)	-24.2 dBc	Normal, Temp L, Temp H	Low, Mid, High	PASS	PASS	PASS
In-band emission	In-band emission (3.2dBm ± 3.2dB)	-24.2 dBc	Normal, Temp L, Temp H	Low, Mid, High	PASS	PASS	PASS
EVM equalizer spectrum flatness	EVM equalizer spectrum flatness Range 1	5.4 dB↓	Normal, Temp L, Temp H	Low, Mid, High	PASS	PASS	PASS
Spectrum emission mask	Spectrum Emission Mask upper/lower Area 1	-16.5 dBm↓	Normal	Low, Mid, High	PASS	PASS	PASS
	Spectrum Emission Mask upper/lower Area 2	-8.5 dBm↓			PASS	PASS	PASS
	Spectrum Emission Mask upper/lower Area 3	-11.5 dBm↓			PASS	PASS	PASS
	Spectrum Emission Mask upper/lower Area 4	-23.5 dBm↓			PASS	PASS	PASS
Adjacent Channel Leakage Power Ratio (ACLR)	ACLR E-UTRA ±	-29.2dB↓	Normal, Temp L, Temp H	Low, Mid, High	PASS	PASS	PASS
	ACLR UTRA Offset 1 ±	-32.2dB↓			PASS	PASS	PASS
	ACLR UTRA Offset 2 ±	-35.2dB↓			PASS	PASS	PASS
Reference Sensitivity Level @ 10MHz	Ref Sense throughput shall be ≥ 95%	≤-96.3dBm (B4) ≤-93.3dBm (B13) ≤-94.3dBm (B2, B5) @QPSK, BW: 10MHz Rx Chain-Dual	Normal, Temp L, Temp H	Low, Mid, High	PASS	PASS	PASS

[CTO] symbol noted in Maximum Output Power and Reference Sensitivity Level sections.

8. RFx Information

The strength of the RF field produced by the wireless module or modules embedded in the TCU is well within all international RF exposure limits known at this time. Because the wireless modules embedded in the TCU emit less than the maximum amount of energy permitted in radio frequency safety standards and recommendations, the manufacturer believes these modules are safe for use.

Regardless of the power levels, care should be taken to minimize human contact during normal operation. This module should be remain more than 20 cm (8 inches) from the body when wireless devices are on and transmitting.

This transmitter must not be collocated or operated in conjunction with any other antenna or transmitter. Operation is subject to the following two conditions: (1) this module does not cause interference, (2) this module accepts any interference that may cause undesired operation.

8.1 Information for the Integrator

The integrator must not provide information to the end user regarding how to install or remove this RF module in the user manual of the end product. The user manual that is provided by the integrator for end users must include the following information in a prominent location. To comply with FCC RF exposure requirements, the antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be collocated or operated in conjunction with any other antenna or transmitter.

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