ST6208C/ST6209C/ST6210C/ST6220C
10.6 MEMORY CHARACTERISTICS
Subject to general operating conditions for V , f
, and T unless otherwise specified.
A
DD OSC
10.6.1 RAM and Hardware Registers
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1)
V
Data retention
0.7
V
RM
10.6.2 EPROM Program Memory
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
2)
3)
t
Data retention
T =+55°C
10
years
ret
A
Figure 55. EPROM Retention Time vs. Temperature
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 supply voltage without losing data stored in RAM (in STOP mode or under RESET) or in hardware reg-
DD
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 decreases, see Figure 55.
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STMICROELECTRONICS [ ST ]
