STM8L151XX Datasheet, PDF (94/101 Pages) STMicroelectronics – 8-bit ultralow power MCU, up to 32 KB Flash, 1 KB Data EEPROM RTC, LCD, timers, USART, I2C, SPI, ADC, DAC, comparators

Package characteristics
STM8L151xx, STM8L152xx
9.2
Package mechanical data
Figure 21. WFQFPN28 – 28-lead very very thin fine
pitch quad flat no-lead package outline
(4 x 4)⁽¹⁾
Figure 22. Recommended footprint
(dimensions in mm)⁽¹⁾
A3
D
e
7
b
1
L2
28
1. Drawing is not to scale.
ddd
A1
14
15
e
E
21
L1
22
DG_ME b
Table 53.
Dim.
WFQFPN28 – 28-lead very very thin fine pitch quad flat no-lead package (4 x 4),
package mechanical data⁽¹⁾
mm
inches⁽²⁾
Min
Typ
Max
Min
Typ
Max
A⁽¹⁾
0.7
0.75
0.8
0.0276
0.0295
0.0315
A1
0
0.02
0.05
0
0.0008
0.002
A3
0.2
0.0079
b
0.18
0.25
0.3
0.0071
0.0098
0.0118
D
4
0.1575
E
4
0.1575
e
0.5
0.0197
L1
0.25
0.35
0.45
0.0098
0.0138
0.0177
L2
0.3
0.4
0.5
0.0118
0.0157
0.0197
ddd
0.08
0.0031
Number of pins
N
28
1. Thickness valid for the WFQFPN28 package in the sampling phase. In the production phase, the UFQFPN28 package will
be used with a thickness equal to 0.6 mm.
2. Values in inches are converted from mm and rounded to 4 decimal digits.
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Doc ID 15962 Rev 2