Datasheet

 1996 Microchip Technology Inc. DS21058G-page 3
24C65
TABLE 1-3: AC CHARACTERISTICS
FIGURE 1-2: BUS TIMING DATA
Parameter Symbol
STD. MODE FAST MODE
Units Remarks
Min Max Min Max
Clock frequency F CLK — 100 — 400 kHz
Clock high time T
HIGH 4000 — 600 — ns
Clock low time T
LOW 4700 — 1300 — ns
SDA and SCL rise time T
R — 1000 — 300 ns (Note 1)
SDA and SCL fall time T
F — 300 — 300 ns (Note 1)
START condition hold time T
HD : STA 4000 — 600 — ns After this period the first
clock pulse is generated
START condition setup time T
SU : STA 4700 — 600 — ns Only relevant for repeated
START condition
Data input hold time T
HD : DAT 0—0—ns
Data input setup time T
SU : DAT 250 — 100 — ns
STOP condition setup time T
SU : STO 4000 — 600 — ns
Output valid from clock T
AA — 3500 — 900 ns (Note 2)
Bus free time T
BUF 4700 — 1300 — ns Time the bus must be free
before a new transmission
can start
Output fall time from V
IH min to
V
IL max
T
OF — 250 20 + 0.1
C
B
250 ns (Note 1), C B ≤ 100 pF
Input filter spike suppression
(SDA and SCL pins)
T
SP — 50 — 50 ns (Note 3)
Write cycle time T
WR —5—5ms/page (Note 4)
Endurance
High Endurance Block
Rest of Array
10M
1M
—
—
10M
1M
—
—
cycles 25 ° C, Vcc = 5.0V, Block
Mode (Note 5)
Note 1: Not 100 percent tested. CB = total capacitance of one bus line in pF.
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region
(minimum 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.
3: The combined T
SP
and V
HYS
specifications are due to new Schmitt trigger inputs which provide improved
noise and spike suppression. This eliminates the need for a T
I
specification for standard operation.
4: The times shown are for a single page of 8 bytes. Multiply by the number of pages loaded into the write
cache for total time.
5: This parameter is not tested but guaranteed by characterization. For endurance estimates on a specific
application, please consult the Total Endurance Mode which can be obtained on our BBS or website.
SCL
SDA
IN
SDA
OUT
TSU:STA
TSP
TAA
TF
TLOW
THIGH
THD:STA
THD:DAT
TSU:DAT
TSU:STO
TBUF
TAA
TR