Philips Semiconductors
PCF8594C-2
512 × 8-bit CMOS EEPROM with I 2 C-bus interface
SDA
t BUF
t LOW
tf
t HD;STA
SCL
P
S
S
P
t HD;STA
tr
t HD;DAT
t HIGH
t SU;DAT
t SU;STA
MBA705
t SU;STO
P = STOP condition; S = START condition.
Fig 9. Timing requirements for the I 2 C-bus.
12. Write cycle limits
Table 9: Write cycle limits
Selection of the chip address is achieved by connecting the A0, A1 and A2 inputs to either V SS or V DD .
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
E/W cycle timing
t E/W
E/W cycle time
internal oscillator
external clock
?
4
7
?
?
10
ms
ms
Endurance
N E/W
E/W cycle per byte
T amb = ? 40 ° C to +85 ° C
100000
?
?
cycles
T amb = 22 ° C
1000000
?
cycles
13. External clock timing
PTC
td
t r
t HIGH
1
t f
t LOW
2
257
SDA
SCL
Fig 10. One byte E/W cycle.
9397 750 14221
STOP
MBA697
? Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 05 — 25 October 2004
12 of 21
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