LC76GABMD

Part: LC76G Series from Quectel Type: GNSS Module Series

Key Specs:

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Features:

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Applications:

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Package:

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• ⚫ The single-band, multi-constellation GNSS module series features a high-performance, high reliability positioning engine facilitating fast and precise GNSS positioning.
• ⚫ The LC76G (AB) is designed to meet standard application requirements while operating at 3.3 V, while the LC76G (PA) and the LC76G (PB) are super low power consumption variants operating at 3.3 V and 1.8 V respectively.
• ⚫ Supported serial communication interfaces: UART, SPI* and I2C.
• ⚫ Supported advanced power saving modes: Backup mode and ALP mode.
• ⚫ The embedded low-power algorithms make the LC76G series module suitable for different application scenarios.
• ⚫ EASY technology facilitates achieving a faster Time to First Fix (TTFF) in either hot or warm start.
• ⚫ The integrated flash memory provides the capacity for storing user-specific configurations and future firmware upgrades.

The LC76G is a series of SMD type modules with a compact form factor of 10.1 mm ×9.7 mm ×2.4 mm. They can be embedded in your applications through 18 LCC pins and 10 LGA pins.

The LC76G series is fully compliant with the EU RoHS Directive.

The module is equipped with 28 pins (18 LCC pins and 10 LGA pins) by which it can be mounted on your PCB.

Figure 2: Pin Assignment

Table 5: I/O Parameter Definition

Table 6: Pin Description

| Function | Name | No. | I/O | Description | DC Characteristics | Remarks | |----------|-----------|-----|-----|---------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------| | | RXD | 3 | DI | Receives data | | | D_SEL | 24 | DI | Selects the
interface to
download | For LC76G (AB, PA):
VILmin = -0.3 V
VILmax = 0.8 V
VIHmin = 2 V
VIHmax = VCC + 0.3 V | For LC76G (PB): | D_SEL is
internally pulled
down by default.
High level: select SPI to
download;
Low level: select UART to
download. | | | SPI_CLK* | 25 | DI | SPI clock | VILmin = -0.3 V | | | SPI_CS* | 20 | DI | SPI chip-select | VILmax = 0.45 V
VIHmin = 1.35 V | SPI supports RTCM | | | SPI_MOSI* | 27 | DI | SPI master out;
slave in | VIHmax = VCC + 0.3 V | message, standard NMEA
message, PAIR/PQTM | | | SPI_MISO* | 26 | DO | SPI master in;
slave out | For LC76G (AB, PA):
VOLmax = 0.4 V
VOHmin = 2.4 V
For LC76G (PB):
VOLmax = 0.27 V
VOHmin = 1.53 V | message and firmware
upgrade. In this case, the
module requires a four-wire
SPI (SPI_MOSI, SPI_MISO,
SPI_CLK and SPI_CS). | | | I2C_SCL | 17 | DI | I2C serial clock | For LC76G (AB, PA): | | | I2C_SDA | 16 | DIO | I2C serial data | VILmin = -0.3 V
VILmax = 0.8 V
VIHmin = 2 V
VIHmax = VCC + 0.3 V
VOLmax = 0.4 V
VOHmin = 2.4 V
For LC76G (PB):
VILmin = -0.3 V
VILmax = 0.45 V
VIHmin = 1.35 V
VIHmax = VCC + 0.3 V
VOLmax = 0.27 V
VOHmin = 1.53 V
For LC76G (AB, PA):
VOLmax = 0.4 V
VOHmin = 2.4 V | I2C interface supports
RTCM message, standard
NMEA message and
PAIR/PQTM message. | | | | | | | | Once the pin is activated,
the receiver continuously
compares its current | | | GEOFENCE | 21 | DO | Indicates
geofence status
For LC76G (PB):
VOLmax = 0.27 V
VOHmin = 1.53 V | | | position to the preset
geofence area.
If unused, leave the pin N/C
(not connected). |

NOTE

• 1. To ensure that the module enters the normal operating mode, it is necessary that GEOFENCE and 3D_FIX* pins cannot be pulled up within 50 ms after the module is reset or powered on.
• 1. Leave RESERVED and unused pins N/C.

Absolute maximum ratings for power supply and voltage on digital pins of the module are listed in table below.

Table 10: Absolute Maximum Ratings for LC76G (AB) and LC76G (PA)

Table 11: Absolute Maximum Ratings for LC76G (PB)

NOTE

Stressing the device beyond the "Absolute Maximum Ratings" may cause permanent damage. The product is not protected against over-voltage or reversed voltage. Therefore, it is necessary to use appropriate protection diodes to keep voltage spikes within the parameters given in the table above.

All specifications are at an ambient temperature of +25 °C. Extreme operating temperatures can significantly impact the specified values. Applications operating near the temperature limits should be tested to ensure specification validity.

Table 12: Recommended Operating Conditions for LC76G (AB) and LC76G (PA)

Parameter	Description	Min.	Typ.	Max.	Unit
VCC	Main Power Supply Voltage	2.55	3.3	3.6	V
V_BCKP	Backup Supply Voltage	1.65	3.3	3.6	V
IO_Domain	Digital I/O Pin Voltage Domain	-	VCC	-	V
VIL	Digital I/O Pin Low-level Input Voltage	-0.3	-	0.8	V
VIH	Digital I/O Pin High-level Input Voltage	2	-	VCC + 0.3	V
VOL	Digital I/O Pin Low-level Output Voltage	-	-	0.4	V
VOH	Digital I/O Pin High-level Output Voltage	2.4	-	-	V
	Low-level Input Voltage	-0.3	-	0.45	V
RESET_N	High-level Input Voltage	1.8	-	3.6	V
VDD_RF	VDD_RF Output Voltage	-	VCC	-	V
IVDD_RF	VDD_RF Output Current	-	-	100	mA
T_operating	Operating Temperature	-40	25	+85	°C

Table 13: Recommended Operating Conditions for LC76G (PB)

NOTE

• 1. Operation beyond the "Operating Conditions" is not recommended and extended exposure beyond the "Operating Conditions" may affect device reliability.
• 1. Digital I/O Pin refers to all digital pins specified in Table 6: Pin Description except RESET_N.