STM32L476RC

Arm Cortex-M4 MCU

The STM32L476RC is a arm cortex-m4 mcu from STMicroelectronics. View the full STM32L476RC datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

STMicroelectronics

Key Specifications

Parameter	Value
Sram	Up to 128 KB
Cpu Core	Arm Cortex-M4 with FPU
Gpio Count	Up to 114
Adc Channels	3x 12-bit, 5 Msps
Dac Channels	2x 12-bit
Flash Memory	Up to 1 MB
Cpu Frequency	Up to 80 MHz
Run Mode Current Ldo	100 μA/MHz
Supply Voltage Range	1.71 V to 3.6 V
Run Mode Current Smps	39 μA/MHz
Shutdown Mode Current	30 nA
Communication Interfaces	USB OTG 2.0 FS
Operating Temperature Range	-40 °C to 125 °C

Overview

Part: STM32L476xx from STMicroelectronics

Type: Ultra-low-power Arm Cortex-M4 32-bit MCU+FPU

Description: Ultra-low-power Arm Cortex-M4 32-bit MCU+FPU with up to 1MB flash, 128 KB SRAM, USB OTG FS, LCD, and a maximum frequency of 80 MHz.

Operating Conditions:

Supply voltage: 1.71 V to 3.6 V
Operating temperature: -40 °C to 125 °C
Max CPU frequency: 80 MHz

Absolute Maximum Ratings:

Max supply voltage: 4.0 V (VDD, VDDA, VDDUSB, VDDIO2, VDDLCD)
Max junction/storage temperature: -65 to +150 °C (Storage temperature range)

Key Specs:

Core: Arm 32-bit Cortex-M4 CPU with FPU, up to 80 MHz
Flash memory: Up to 1 MB, 2 banks read-while-write
SRAM: Up to 128 KB, including 32 KB with hardware parity check
ADC: 3x 12-bit, 5 Msps, up to 16-bit with hardware oversampling
Run mode current: 39 μA/MHz (@3.3 V SMPS Mode)
Low-power Stop 2 mode current: 1.1 μA (1.4 μA with RTC)
I/Os: Up to 114 fast I/Os, most 5 V-tolerant
Communication: USB OTG 2.0 full-speed, 3x I2C, 5x USARTs, 3x SPIs, 1x Quad SPI, CAN, SDMMC

Features:

Ultra-low-power with FlexPowerControl
Adaptive real-time accelerator (ART Accelerator™) for 0-wait-state execution from flash
Up to 24 capacitive sensing channels
LCD 8×40 or 4×44 with step-up converter
Rich analog peripherals: 2x 12-bit DAC, 2x operational amplifiers, 2x ultra-low-power comparators
True random number generator

Applications:

Package:

LQFP144
UFBGA144
UFBGA132
LQFP100
WLCSP99
WLCSP81
WLCSP72
LQFP64

Pin Configuration

Figure 6. STM32L476Zx LQFP144 pinout (1)(2)

The above figure shows the package top view.
The I/O pins supplied by V DDIO2 are shown in gray.

107

Figure 7. STM32L476Zx, external SMPS device, LQFP144 pinout (1)(2)

The above figure shows the package top view.
The I/O pins supplied by V DDIO2 are shown in gray.

Electrical Characteristics

The definition and values of input/output AC characteristics are given in Figure 31 and Table 72 , respectively.

Unless otherwise specified, the parameters given are derived from tests performed under the ambient temperature and supply voltage conditions summarized in Table 23: General operating conditions .

Table 72. I/O AC characteristics (1)(2)

Speed	Symbol	Parameter	Conditions	Min	Max	Unit
00	Fmax	Maximum frequency	C=50 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	5	MHz
00	Fmax	Maximum frequency	C=50 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	1	MHz
00	Fmax	Maximum frequency	C=50 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	0.1	MHz
00	Fmax	Maximum frequency	C=10 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	10	MHz
00	Fmax	Maximum frequency	C=10 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	1.5	MHz
00	Fmax	Maximum frequency	C=10 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	0.1	MHz
00	Tr/Tf	Output rise and fall time	C=50 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	25	ns
00	Tr/Tf	Output rise and fall time	C=50 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	52	ns
00	Tr/Tf	Output rise and fall time	C=50 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	140	ns
00	Tr/Tf	Output rise and fall time	C=10 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	17	ns
00	Tr/Tf	Output rise and fall time	C=10 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	37	ns
00	Tr/Tf	Output rise and fall time	C=10 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	110	ns
01	Fmax	Maximum frequency	C=50 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	25	MHz
01	Fmax	Maximum frequency	C=50 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	10	MHz
01	Fmax	Maximum frequency	C=50 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	1	MHz
01	Fmax	Maximum frequency	C=10 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	50	MHz
01	Fmax	Maximum frequency	C=10 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	15	MHz
01	Fmax	Maximum frequency	C=10 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	1	MHz
01	Tr/Tf	Output rise and fall time	C=50 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	9	ns
01	Tr/Tf	Output rise and fall time	C=50 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	16	ns
01	Tr/Tf	Output rise and fall time	C=50 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	40	ns
01	Tr/Tf	Output rise and fall time	C=10 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	4.5	ns
01	Tr/Tf	Output rise and fall time	C=10 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	9	ns
01	Tr/Tf	Output rise and fall time	C=10 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	21	ns

Table 72. I/O AC characteristics (1)(2)

232

Table 72. I/O AC characteristics (1)(2) (continued)

Speed	Symbol	Parameter	Conditions	Min	Max	Unit
10		Maximum frequency	C=50 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	50	MHz
10			C=50 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	25	MHz
10	Fmax		C=50 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	5	MHz
10			C=10 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	100 (3)	MHz
10			C=10 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	37.5	MHz
10			C=10 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	5	MHz
10	Tr/Tf	Output rise and fall time	C=50 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	5.8	ns
10		Output rise and fall time	C=50 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	11	ns
10			C=50 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	28	ns
10			C=10 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	2.5	ns
10			C=10 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	5	ns
10			C=10 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	12	ns
11		Maximum frequency	C=30 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	120 (3)	MHz
11		Maximum frequency	C=30 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	50	MHz
11		Maximum frequency	C=30 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	10	MHz
11	Fmax	Maximum frequency	C=10 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	180 (3)	MHz
11			C=10 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	75	MHz
11			C=10 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	10	MHz
11		Output rise and fall	C=30 pF, 2.7 V ≤ V DDIOx ≤ 3.6 V	-	3.3	ns
11	Tr/Tf	time	C=30 pF, 1.62 V ≤ V DDIOx ≤ 2.7 V	-	6	ns
11			C=30 pF, 1.08 V ≤ V DDIOx ≤ 1.62 V	-	16	ns
Fm+	Fmax	Maximum frequency	C=50 pF, 1.6 V ≤ V DDIOx ≤ 3.6 V	-	1	MHz
Fm+	Tf	Output fall time (4)	C=50 pF, 1.6 V ≤ V DDIOx ≤ 3.6 V	-	5	ns

This value represents the I/O capability but the maximum system frequency is limited to 80 MHz.
The fall time is defined between 70% and 30% of the output waveform accordingly to I 2 C specification.

Figure 31. I/O AC characteristics definition (1)

Refer to Table 72: I/O AC characteristics .

Absolute Maximum Ratings

Stresses above the absolute maximum ratings listed in Table 20: Voltage characteristics , Table 21: Current characteristics and Table 22: Thermal characteristics may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Device mission profile (application conditions) is compliant with JEDEC JESD47 qualification standard, extended mission profiles are available on demand.

Table 20. Voltage characteristics (1)

Symbol	Ratings	Min	Max	Unit
V DDX - V SS	External main supply voltage (including V DD , V DDA , V DDIO2 , V DDUSB , V LCD , V BAT , V REF+ )	-0.3	4	V
V DD12 - V SS	External SMPS supply voltage	Range 1 -0.3	1.4	V
V DD12 - V SS	External SMPS supply voltage	Range 2 -0.3	1.4	V

Table 20. Voltage characteristics (1)

Table 20. Voltage characteristics (1) (continued)

Symbol	Ratings	Min	Max	Unit
V IN (2)	Input voltage on FT_xxx pins	V SS -0.3	min (V DD , V DDA , V DDIO2 , V DDUSB , V LCD ) + 4.0 (3)(4)	V
V IN (2)	Input voltage on TT_xx pins	V SS -0.3	4.0	V
V IN (2)	Input voltage on BOOT0 pin	V SS	9.0	V
V IN (2)	Input voltage on any other pins	V SS -0.3	4.0	V
\| ∆ V DDx \|	Variations between different V DDX power pins of the same domain	-	50	mV
\|V SSx -V SS \|	Variations between all the different ground pins (5)	-	50	mV
V REF+ - V DDA	Allowed voltage difference for V REF+ > V DDA	-	0.4	V

This formula has to be applied only on the power supplies related to the IO structure described in the pin definition table.
To sustain a voltage higher than 4 V the internal pull-up/pull-down resistors must be disabled.
Include VREF- pin.

Table 21. Current characteristics

Symbol	Ratings	Max	Unit
∑ IV DD	Total current into sum of all V DD power lines (source) (1)(2)	150	mA
∑ IV SS	Total current out of sum of all V SS ground lines (sink) (1)	150	mA
IV DD(PIN)	Maximum current into each V DD power pin (source) (1)(2)	100	mA
IV SS(PIN)	Maximum current out of each V SS ground pin (sink) (1)	100	mA
I IO(PIN)	Output current sunk by any I/O and control pin except FT_f	20	mA
I IO(PIN)	Output current sunk by any FT_f pin	20	mA
I IO(PIN)	Output current sourced by any I/O and control pin	20	mA
∑ I IO(PIN)	Total output current sunk by sum of all I/Os and control pins (3)	100	mA
∑ I IO(PIN)	Total output current sourced by sum of all I/Os and control pins (3)	100	mA
I INJ(PIN) (4)	Injected current on FT_xxx, TT_xx, RST and B pins, except PA4, PA5	-5/+0 (5)	mA
I INJ(PIN) (4)	Injected current on PA4, PA5	-5/0	mA
∑ \|I INJ(PIN) \|	Total injected current (sum of all I/Os and control pins) (6)	25	mA

232

A negative injection is induced by V IN < V SS . I INJ(PIN) must never be exceeded. Refer also to Table 20: Voltage characteristics for the minimum allowed input voltage values.
When several inputs are submitted to a current injection, the maximum ∑ |I INJ(PIN) | is the absolute sum of the negative injected currents (instantaneous values).

Thermal Information

Symbol	Ratings	Value	Unit
T STG	Storage temperature range	-65 to +150	°C
T J	Maximum junction temperature	150	°C

Package Information

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com . ECOPACK is an ST trademark.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
STM32L476	STMicroelectronics	—
STM32L476JE	STMicroelectronics	—
STM32L476JG	STMicroelectronics	—
STM32L476JX	STMicroelectronics	—
STM32L476ME	STMicroelectronics	—
STM32L476MG	STMicroelectronics	—
STM32L476MGY6MTR	STMicroelectronics	—
STM32L476MX	STMicroelectronics	—
STM32L476QE	STMicroelectronics	—
STM32L476QG	STMicroelectronics	—
STM32L476QX	STMicroelectronics	—
STM32L476RE	STMicroelectronics	—
STM32L476RG	STMicroelectronics	—
STM32L476RGT6	STMicroelectronics	—
STM32L476RX	STMicroelectronics	—
STM32L476VC	STMicroelectronics	—
STM32L476VE	STMicroelectronics	—
STM32L476VG	STMicroelectronics	—
STM32L476VXT	STMicroelectronics	—
STM32L476VXY	STMicroelectronics	—
STM32L476XX	STMicroelectronics	—
STM32L476ZE	STMicroelectronics	—
STM32L476ZG	STMicroelectronics	—
STM32L476ZX	STMicroelectronics	—

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