CD00001237 Datasheet, PDF (77/105 Pages) STMicroelectronics – 8-bit MCUs with A/D converter

ST6215C ST6225C
11.6 MEMORY CHARACTERISTICS
Subject to general operating conditions for V_DD, f_OSC, and T_A unless otherwise specified.
11.6.1 RAM and Hardware Registers
Symbol
Parameter
V_RM Data retention¹⁾
Conditions
Min
Typ
Max
0.7
11.6.2 EPROM Program Memory
Symbol
Parameter
t_ret
Data retention ²⁾
Conditions
T_A=+55°C ³⁾
Min
Typ
Max
10
Figure 55. EPROM Retention Time vs. Temperature
Unit
V
Unit
years
Retention time [Years]
100000
10000
1000
100
10
1
0.1
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80 90 100 110 120
Temperature [°C]
Notes:
1. Minimum V_DD supply voltage without losing data stored in RAM (in STOP mode or under RESET) or in hardware reg-
isters (only in STOP mode). Guaranteed by construction, not tested in production.
2. Data based on reliability test results and monitored in production. For OTP devices, data retention and programmability
must be guaranteed by a screening procedure. Refer to Application Note AN886.
3. The data retention time increases when the T_A decreases, see Figure 55.
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