M24C64-R datasheet(26/54 Pages) STMICROELECTRONICS

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DC and AC parameters

M24C64-W M24C64-R M24C64-F M24C64-DF

26/54

DS6638 Rev 36

Figure 14. AC measurement I/O waveform

Table 13. Input parameters

Symbol

Parameter(1)

1. Characterized only, not tested in production.

Test condition

Min.

Max.

Unit

CIN

Input capacitance (SDA)

CIN

Input capacitance (other pins)

Input impedance (E2, E1, E0, WC)(2)

2. input impedance when the memory is selected (after a Start condition).

VIN < 0.3 VCC

VIN > 0.7 VCC

500

Table 14. Cycling performance

Symbol

Parameter

Test condition

Max.(1)

1. Cycling performance for products identified by process letter K or T (previous products were specified with

1 million cycles at 25 °C)

Unit

Ncycle

Write cycle

endurance(2)

2. The Write cycle endurance is defined by characterization and qualification. For devices embedding the

ECC functionality (see Chapter 5.1.5), the write cycle endurance is defined for group of four bytes located

at addresses [4*N, 4*N+1, 4*N+2, 4*N+3] where N is an integer.

TA ≤ 25 °C, VCC(min) < VCC < VCC(max)

4,000,000

Write cycle(3)

3. A Write cycle is executed when either a Page Write, a Byte write, a Write Identification Page or a Lock

Identification Page instruction is decoded. When using the Byte Write, the Page Write or the Write

Identification Page, refer also to Section 5.1.5: ECC (Error Correction Code) and Write cycling

TA = 85 °C, VCC(min) < VCC < VCC(max)

1,200,000

Table 15. Memory cell data retention

Parameter

Test condition

Min.

Unit

Data retention(1)

1. The data retention behavior is checked in production, while the data retention limit defined in this table is

extracted from characterization and qualification results.

TA = 55 °C

200(2)

2. For products identified by process letter K or T (previous products were specified with a data retention of 40

years at 55°C).

Year

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