STM32L071KB datasheet(128/148 Pages) STMICROELECTRONICS

Part #	STM32L071KB

Description	Access line ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, ADC

PDF	148 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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128 / 148 page

Package information

STM32L071xx

128/148

DS10690 Rev 7

Device marking for WLCSP49

The following figure gives an example of topside marking versus ball A 1 position identifier

location.

The printed markings may differ depending on the supply chain.

Other optional marking or inset/upset marks, which depend on supply chain operations, are

not indicated below.

Figure 54. WLCSP49 marking example (package top view)

1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet

qualified and therefore not approved for use in production. ST is not responsible for any consequences

resulting from such use. In no event will ST be liable for the customer using any of these engineering

samples in production. ST’s Quality department must be contacted prior to any decision to use these

engineering samples to run a qualification activity.

Table 84. WLCSP49 recommended PCB design rules (0.4 mm pitch)

Dimension

Recommended values

Pitch

0.4

Dpad

260 µm max. (circular)

220 µm recommended

Dsm

300 µm min. (for 260 µm diameter pad)

PCB pad design

Non-solder mask defined via underbump allowed.

MSv39398V1

L071CZ6

Y WW

Product identification

(1)

Ball 1

indentifier

Date code

Revision code

STM32L071KB Datasheet(PDF) 128 Page - STMicroelectronics