S-25C256A Datasheet, PDF (4/31 Pages) Seiko Instruments Inc – Write protect function during the low power supply voltage

SPI SERIAL E²PROM
S-25C256A
Rev.2.2_02_S
 Absolute Maximum Ratings
Table 3
Item
Symbol
Absolute Maximum Rating
Unit
Power supply voltage
VCC
−0.3 to + 6.5
V
Input voltage
VIN
−0.3 to + 6.5
V
Output voltage
VOUT
−0.3 to VCC + 0.3
V
Operation ambient temperature
Topr
−40 to +85
°C
Storage temperature
Tstg
−65 to +150
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
 Recommended Operating Conditions
Item
Power supply voltage
High level input voltage
Low level input voltage
Table 4
Symbol
Condition
VCC
Read Operation
Write Operation
VIH
VCC = 1.8 V to 5.5 V
VCC = 1.6 V to 1.8 V
VIL
VCC = 1.8 V to 5.5 V
VCC = 1.6 V to 1.8 V
Ta = −40°C to +85°C
Min.
Max.
Unit
1.6
5.5
V
1.7
5.5
V
0.7 × VCC
VCC + 1.0
V
0.8 × VCC
VCC + 1.0
V
−0.3
0.3 × VCC
V
−0.3
0.2 × VCC
V
 Pin Capacitance
Item
Input capacitance
Output capacitance
Symbol
Table 5
Condition
(Ta = +25°C, f = 1.0 MHz, VCC = 5.0 V)
Min.
Max.
Unit
CIN
VIN = 0 V ( CS , SCK, SI, WP , HOLD )
−
COUT VOUT = 0 V (SO)
−
8
pF
10
pF
 Endurance
Table 6
Item
Symbol Operation Ambient Temperature
Min.
Endurance
NW
Ta = +25°C
10⁶
*1. For each unit (unit: the 4 bytes with the same address of A14 to A2)
Max.
−
Unit
cycles / unit^*1
 Data Retention
Table 7
Item
Symbol Operation Ambient Temperature
Min.
Max.
Unit
Data retention
−
Ta = +25°C
100
−
year
4