STM32L162ZDT6 - 32MHz Cortex-M3 MCU 384KB Flash USB AES | STMicroelectronics
MPN: STM32L162ZDT6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.85 | $985.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.1 | $7,100.00 |
STM32L162ZDT6 Overview
What is an ultra-low-power microcontroller? An ultra-low-power microcontroller is a category of embedded MCU optimized to consume the least energy in active and sleep modes. It belongs to the broader taxonomy microcontroller -> embedded processor -> semiconductor device. The STM32L1 family positions itself for battery-powered applications where every microamp counts, including metering, medical portables, IoT sensors and wearable electronics.
Key features include 7 low-power modes, RTC with backup registers, integrated LCD driver up to 8x40, AES-128 hardware accelerator, USB 2.0 full-speed device with on-chip PHY, 12-bit ADC and DAC, multiple comparators, and up to 114 general-purpose I/Os on the 144-LQFP variant. The ARM Cortex-M3 core runs at 32 MHz, providing 1.25 DMIPS/MHz while drawing roughly 230 uA/MHz active, an order of magnitude lower than legacy Cortex-M3 microcontrollers.
The device is built on a 130 nm ultra-low-leakage CMOS process with embedded Flash, and supports 1.8 V to 3.6 V supply operation. The architecture includes a nested vectored interrupt controller, bit-banding, MPU, and JTAG/SWD debug interfaces. Hardware AES-128 accelerates encryption with zero CPU load, while the LCD controller with charge pump drives segment displays directly.
Typical applications include battery-powered medical instruments, wireless sensor nodes, smart metering, industrial control with HMI segment displays, asset tracking, and USB-enabled data loggers. The 384 KB Flash supports rich application firmware with over-the-air upgrade capability and protocol stacks such as USB, BLE through SPI, or LoRaWAN via external transceiver.
When designing with the STM32L162ZDT6, carefully select the appropriate low-power mode (Stop, Standby, Sleep) based on wake-up latency and residual current budget. The USB peripheral requires a 1.5 kohm pull-up and proper PCB stack-up for signal integrity; the AES engine uses 128-bit key only.
This page synthesizes distributor pricing, parametric comparison, and drop-in alternatives not found in the manufacturer datasheet. Engineers should cross-check the latest datasheet revision and errata before committing to a design.
Drop-in alternatives for STM32L162ZDT6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32L162ZDT6 (same form factor and footprint) — differing in ADC, Communication Interfaces, Comparators, Core, DAC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32L152ZDT6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32L162VCT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32L162ZDT6
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$7.1 / Unit
View Datasheet →STM32L162ZET6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32L162RDT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32L162ZDT6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M3 32-bit |
| Maximum Clock Frequency | 32 MHz |
| Flash Memory | 384 KB |
| SRAM | 48 KB |
| Supply Voltage Range | 1.65 V to 3.6 V (with BOR), 2.0 V to 3.6 V (USB active) |
| Package | 144-pin LQFP (20x20 mm) |
| Operating Temperature | -40C to +85C |
| USB | USB 2.0 full-speed device with on-chip PHY |
| Hardware Crypto | AES-128 hardware accelerator |
| LCD Controller | Up to 8x40 segments with built-in charge pump |
| ADC | 12-bit SAR, multiple channels |
| DAC | 12-bit |
| Comparators | 2 ultra-low-power comparators |
| Timers | Multiple 16-bit/32-bit timers, RTC with backup registers |
| Communication Interfaces | USART, SPI, I2C, USB |
| GPIO Count (144-pin variant) | Approximately 114 |
| RoHS Status | Compliant |
STM32L162ZDT6 Pin Configuration
| Pin 1 | PE2/TRACECLK — GPIO PE2 / Trace clock |
| Pin 2 | PE3/TRACED0 — GPIO PE3 / Trace data 0 |
| Pin 3 | PE4/TRACED1 — GPIO PE4 / Trace data 1 |
| Pin 4 | PE5/TRACED2 — GPIO PE5 / Trace data 2 |
| Pin 5 | PE6/TRACED3 — GPIO PE6 / Trace data 3 |
| Pin 6 | VBAT — RTC backup battery supply |
| Pin 7 | PC13/ANTI_TAMP — GPIO PC13 / Anti-tamper |
| Pin 8 | PC14/OSC32_IN — GPIO PC14 / 32.768 kHz oscillator in |
| Pin 9 | PC15/OSC32_OUT — GPIO PC15 / 32.768 kHz oscillator out |
| Pin 10 | OSC_IN — External clock input |
| Pin 11 | OSC_OUT — External clock output |
| Pin 12 | NRST — Reset (active low) |
| Pin 13 | VSSA — Analog ground |
| Pin 14 | VREF+ — ADC reference voltage positive |
| Pin 15 | VDDA — Analog supply |
| Pin 16 | PA0/WKUP — GPIO PA0 / Wakeup |
| Pin 17 | PA1 — GPIO PA1 |
| Pin 18 | PA2 — GPIO PA2 / USART2_TX |
| Pin 19 | PA3 — GPIO PA3 / USART2_RX |
| Pin 20 | VSS_4 — Digital ground |
| Pin 21 | VDD_4 — Digital supply |
| Pin 22 | PA4 — GPIO PA4 / SPI1_NSS |
| Pin 23 | PA5 — GPIO PA5 |
| Pin 24 | PA6 — GPIO PA6 |
| Pin 25 | PA7 — GPIO PA7 |
| Pin 26 | PC4 — GPIO PC4 |
| Pin 27 | PC5 — GPIO PC5 |
| Pin 28 | PB0 — GPIO PB0 |
| Pin 29 | PB1 — GPIO PB1 |
| Pin 30 | PB2/BOOT1 — GPIO PB2 / Boot mode select |
| Pin 31 | PB10 — GPIO PB10 |
| Pin 32 | PB11 — GPIO PB11 |
| Pin 33 | VSS_1 — Digital ground |
| Pin 34 | VDD_1 — Digital supply |
| Pin 35 | PB12 — GPIO PB12 / SPI2_NSS |
| Pin 36 | PB13 — GPIO PB13 / SPI2_SCK |
| Pin 37 | PB14 — GPIO PB14 / SPI2_MISO |
| Pin 38 | PB15 — GPIO PB15 / SPI2_MOSI |
| Pin 39 | PC6 — GPIO PC6 |
| Pin 40 | PC7 — GPIO PC7 |
| Pin 41 | PC8 — GPIO PC8 |
| Pin 42 | PC9 — GPIO PC9 |
| Pin 43 | PA8 — GPIO PA8 |
| Pin 44 | PA9 — GPIO PA9 / USART1_TX |
| Pin 45 | PA10 — GPIO PA10 / USART1_RX |
| Pin 46 | PA11/USB_DM — GPIO PA11 / USB data minus |
| Pin 47 | PA12/USB_DP — GPIO PA12 / USB data plus |
| Pin 48 | PA13/SWDIO — GPIO PA13 / SWD data |
| Pin 49 | VSS_2 — Digital ground |
| Pin 50 | VDD_2 — Digital supply |
| Pin 51 | PA14/SWCLK — GPIO PA14 / SWD clock |
| Pin 52 | PA15 — GPIO PA15 |
| Pin 53 | PC10 — GPIO PC10 |
| Pin 54 | PC11 — GPIO PC11 |
| Pin 55 | PC12 — GPIO PC12 |
| Pin 56 | PD0 — GPIO PD0 |
| Pin 57 | PD1 — GPIO PD1 |
| Pin 58 | PD2 — GPIO PD2 |
| Pin 59 | PD3 — GPIO PD3 |
| Pin 60 | PD4 — GPIO PD4 |
| Pin 61 | PD5 — GPIO PD5 |
| Pin 62 | VSS_5 — Digital ground |
| Pin 63 | VDD_5 — Digital supply |
| Pin 64 | PD6 — GPIO PD6 |
| Pin 65 | PD7 — GPIO PD7 |
| Pin 66 | PG9 — GPIO PG9 |
| Pin 67 | PG10 — GPIO PG10 |
| Pin 68 | PG11 — GPIO PG11 |
| Pin 69 | PG12 — GPIO PG12 |
| Pin 70 | PG13 — GPIO PG13 |
| Pin 71 | PG14 — GPIO PG14 |
| Pin 72 | VSS_3 — Digital ground |
| Pin 73 | VDD_3 — Digital supply |
| Pin 74 | PG15 — GPIO PG15 |
| Pin 75 | PB3 — GPIO PB3 / SPI1_SCK |
| Pin 76 | PB4 — GPIO PB4 / SPI1_MISO |
| Pin 77 | PB5 — GPIO PB5 / SPI1_MOSI |
| Pin 78 | PB6 — GPIO PB6 / I2C1_SCL |
| Pin 79 | PB7 — GPIO PB7 / I2C1_SDA |
| Pin 80 | BOOT0 — Boot mode select |
| Pin 81 | PB8 — GPIO PB8 / I2C1_SCL |
| Pin 82 | PB9 — GPIO PB9 / I2C1_SDA |
| Pin 83 | PE0 — GPIO PE0 |
| Pin 84 | PE1 — GPIO PE1 |
| Pin 85 | VSS_6 — Digital ground |
| Pin 86 | VDD_6 — Digital supply |
| Pin 87 | PE7 — GPIO PE7 |
| Pin 88 | PE8 — GPIO PE8 |
| Pin 89 | PE9 — GPIO PE9 |
| Pin 90 | PE10 — GPIO PE10 |
| Pin 91 | PE11 — GPIO PE11 |
| Pin 92 | PE12 — GPIO PE12 |
| Pin 93 | PE13 — GPIO PE13 |
| Pin 94 | PE14 — GPIO PE14 |
| Pin 95 | PE15 — GPIO PE15 |
| Pin 96 | PB10 — GPIO PB10 |
| Pin 97 | PB11 — GPIO PB11 |
| Pin 98 | VSS_7 — Digital ground |
| Pin 99 | VDD_7 — Digital supply |
| Pin 100 | PB12 — GPIO PB12 |
| Pin 101 | PB13 — GPIO PB13 |
| Pin 102 | PB14 — GPIO PB14 |
| Pin 103 | PB15 — GPIO PB15 |
| Pin 104 | PD8 — GPIO PD8 |
| Pin 105 | PD9 — GPIO PD9 |
| Pin 106 | PD10 — GPIO PD10 |
| Pin 107 | PD11 — GPIO PD11 |
| Pin 108 | PD12 — GPIO PD12 |
| Pin 109 | PD13 — GPIO PD13 |
| Pin 110 | VSS_8 — Digital ground |
| Pin 111 | VDD_8 — Digital supply |
| Pin 112 | PD14 — GPIO PD14 |
| Pin 113 | PD15 — GPIO PD15 |
| Pin 114 | PG0 — GPIO PG0 |
| Pin 115 | PG1 — GPIO PG1 |
| Pin 116 | PG2 — GPIO PG2 |
| Pin 117 | PG3 — GPIO PG3 |
| Pin 118 | PG4 — GPIO PG4 |
| Pin 119 | PG5 — GPIO PG5 |
| Pin 120 | PG6 — GPIO PG6 |
| Pin 121 | PG7 — GPIO PG7 |
| Pin 122 | PG8 — GPIO PG8 |
| Pin 123 | VSS_9 — Digital ground |
| Pin 124 | VDD_9 — Digital supply |
| Pin 125 | PF0 — GPIO PF0 |
| Pin 126 | PF1 — GPIO PF1 |
| Pin 127 | PF2 — GPIO PF2 |
| Pin 128 | PF3 — GPIO PF3 |
| Pin 129 | PF4 — GPIO PF4 |
| Pin 130 | PF5 — GPIO PF5 |
| Pin 131 | PF6 — GPIO PF6 |
| Pin 132 | PF7 — GPIO PF7 |
| Pin 133 | PF8 — GPIO PF8 |
| Pin 134 | PF9 — GPIO PF9 |
| Pin 135 | PF10 — GPIO PF10 |
| Pin 136 | PF11 — GPIO PF11 |
| Pin 137 | VSS_10 — Digital ground |
| Pin 138 | VDD_10 — Digital supply |
| Pin 139 | PF12 — GPIO PF12 |
| Pin 140 | PF13 — GPIO PF13 |
| Pin 141 | PF14 — GPIO PF14 |
| Pin 142 | PF15 — GPIO PF15 |
| Pin 143 | PG6 — GPIO PG6 |
| Pin 144 | VSS — Digital ground (pad) |
Typical Applications
STM32L162ZDT6 is suitable for 6 applications: Battery-Powered Smart Metering, Portable Medical Instruments, Industrial Sensor Hubs with Segment Display, Secure IoT Asset Tracker, USB Data Loggers, Wireless Sensor Nodes (Sub-GHz/ZigBee Bridges).
Battery-Powered Smart Metering
The STM32L162ZDT6 fits smart electricity/gas/water meters where multi-year battery life, secure data logging, and segment LCD are essential. Its 230 uA/MHz active current and 1.7 uA Standby with RTC allow coin-cell operation for 10+ years. The AES-128 hardware accelerator secures consumption telemetry against tampering. The integrated LCD controller with charge pump directly drives a 4x40 segment display for cumulative kWh without extra driver ICs. With USB, firmware upgrades in the field are simple via the meter service port, eliminating returns to factory.
Recommended
Portable Medical Instruments
Portable medical devices such as glucose meters, pulse oximeters, and infusion pumps require low-power operation, secure patient data, and small display HMI. The STM32L162ZDT6's 12-bit ADC samples sensor signals accurately, its AES-128 protects data at rest per HIPAA-style requirements, and the LCD controller drives the segment display with no additional driver. Stop modes with RTC wakeup at 1 uA enable week-long operation on small Li-ion batteries. The USB 2.0 full-speed interface transfers measurement logs to a clinician's PC without special cables.
Recommended
Industrial Sensor Hubs with Segment Display
Industrial sensor hubs aggregate multiple analog and digital signals, display status via segment LCD, and connect via USB to factory networks. The STM32L162ZDT6 provides the 12-bit ADC with multiple channels for thermocouples, RTDs, and 4-20 mA loops. Its LCD controller with built-in charge pump drives operator displays directly, simplifying BOM. The AES-128 secures Modbus/TCP and fieldbus traffic; the RTC with backup registers timestamps events during power loss. Wide -40C to +85C operation handles factory floor environments without derating.
Recommended
Secure IoT Asset Tracker
Battery-powered asset trackers combine GPS, motion sensors, and wireless uplinks; they must stay in service for months while securely logging location trails. The STM32L162ZDT6's AES-128 encrypts GPS coordinates and movement data on-device, while its 7 low-power modes put the device into deep sleep between location pings. Stop-mode current under 1.7 uA with RTC extends battery life; the USB port handles firmware updates and tethered debugging. The 384 KB Flash holds the main firmware plus over-the-air upgrade buffer, eliminating external memory cost.
Recommended
USB Data Loggers
USB data loggers that plug directly into PCs need a built-in USB PHY, internal Flash for buffering, and low sleep current between sessions. The STM32L162ZDT6 integrates USB 2.0 full-speed with on-chip PHY, eliminating external components. Its 384 KB Flash stores weeks of samples; AES-128 protects sensitive logs at rest. Stop with RTC mode keeps the device in low-power state until connected. The USB bus-powered operation also charges a small supercap, enabling brief disconnect-tolerant acquisition.
Recommended
Wireless Sensor Nodes (Sub-GHz/ZigBee Bridges)
Wireless sensor nodes combining the STM32L162ZDT6 with a sub-GHz or 2.4 GHz transceiver benefit from the MCU's low active current and AES-128 for link-layer security. The 32 MHz Cortex-M3 handles MAC layer protocols and encryption; the 48 KB SRAM accommodates packet buffers for sub-GHz protocols. The 384 KB Flash stores ZigBee or proprietary stacks. Stop-mode current under 2 uA with RTC allows multi-year battery life for environmental monitoring and building automation deployments.
Recommended
Recommended Products Summary
Engineering reference data for STM32L162ZDT6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32L152ZDT6 | STM32L162ZET6 |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | LQFP-144 | LQFP-144 - same | LQFP-144 - same |
| Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
| Max Clock | 32 MHz | 32 MHz | 32 MHz |
| Flash | 384 KB | 384 KB | 384 KB |
| SRAM | 48 KB | 48 KB | 48 KB |
| AES-128 | Yes (hardware) | No | Yes (hardware) |
| USB | USB 2.0 FS device | USB 2.0 FS device | USB 2.0 FS device |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +105C |
Key Differentiators
- Hardware AES-128 accelerator on-chip (vs STM32L152ZDT6)
- Integrated LCD segment driver with charge pump (vs STM32L152ZDT6)
- Extended temperature grade option in same package (vs STM32L162ZET6)
Design Notes
Estimated: at 32 MHz active the core draws roughly 7.4 mA from 3.3 V (230 uA/MHz x 32 MHz). In Stop mode with RTC active the current falls to about 1.7 uA. Use the PWR->CR register to enter Stop or Standby modes; enable RTC and IWDG wakeup sources as needed. For battery life math, assume 0.1% active duty cycle for typical metering to budget a 600 mAh cell for 5-7 years.
Decouple all VDD pins with 100 nF ceramic capacitors as close to the package as possible. Place one bulk 4.7 uF per pair of VDD/VSS pins. Keep the analog VDDA/VREF+ decoupling isolated from digital VDD noise; consider a ferrite bead between the analog and digital supplies for ADC accuracy below 1 LSB.
Route the USB DP/DM pair with 90 ohm differential impedance and length matching within 150 mil. Place the 1.5 kohm pull-up on D+ close to the MCU with minimal stub. For RTC crystal (32.768 kHz), keep traces short and surrounded by ground guard ring to minimize capacitive loading and frequency drift.
Do not enable USB without a 3.0 V nominal supply (USB transceivers need >= 2.7 V). When using the LCD controller, do not exceed the maximum segment pin loading per pin (typically 8 mA sink). Ensure BOOT0 is pulled to ground for normal boot or to VDD for bootloader mode; floating BOOT0 causes intermittent boot failure.
Compliance Information
RoHS compliant per ST product page; AES-128 hardware encryption supports secure data-at-rest requirements. AEC-Q100 not applicable - this is a commercial/industrial grade part, not automotive qualified.
