STM8S903K3 Datasheet, PDF (96/121 Pages) STMicroelectronics – 16 MHz STM8S 8-bit MCU, up to 8 Kbytes Flash, 1 Kbyte RAM, 640 bytes EEPROM,10-bit ADC, 2 timers, UART, SPI, IC

Package information
STM8S903K3 STM8S903F3
Dim.
Table 56. UFQFPN20 package mechanical data (continued)
mm
inches⁽¹⁾
Min
Typ
Max
Min
Typ
L3
-
0.375
-
-
0.0148
L4
-
0.200
-
-
0.0079
L5
-
0.150
-
-
0.0059
b
0.180
0.250
0.300
0.0071
0.0098
ddd
-
0.050
-
-
0.0020
1. Values in inches are converted from mm and rounded to 4 decimal digits
Max
-
-
-
0.0118
-
Section 11.7: UFQFPN recommended footprint shows the recommended footprints for
UFQFPN with and without on-board emulation.
Device marking
The following figure gives an example of topside marking orientation versus pin 1 identifier
location.
Figure 52. UFQFPN20 marking example (package top view)
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1. Parts marked as “ES”,”E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
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