參數(shù)資料
型號(hào): ST25W16M1TR
廠商: 意法半導(dǎo)體
元件分類: DRAM
英文描述: 16 Kbit Serial I2C Bus EEPROM with User-Defined Block Write Protection
中文描述: 16千位串行I2C總線的EEPROM與用戶定義的塊寫保護(hù)
文件頁(yè)數(shù): 6/17頁(yè)
文件大小: 126K
代理商: ST25W16M1TR
Symbol
Alt
Parameter
Min
Max
Unit
t
CH1CH2
t
R
Clock Rise Time
1
μ
s
t
CL1CL2
t
F
Clock Fall Time
300
ns
t
DH1DH2
t
R
Input Rise Time
1
μ
s
t
DL1DL1
t
F
Input Fall Time
300
ns
t
CHDX
(1)
t
SU:STA
Clock High to Input Transition
4.7
μ
s
t
CHCL
t
HIGH
Clock Pulse Width High
4
μ
s
t
DLCL
t
HD:STA
Input Low to Clock Low (START)
4
μ
s
t
CLDX
t
HD:DAT
Clock Low to Input Transition
0
μ
s
t
CLCH
t
LOW
Clock Pulse Width Low
4.7
μ
s
t
DXCX
t
SU:DAT
Input Transition to Clock Transition
250
ns
t
CHDH
t
SU:STO
Clock High to Input High (STOP)
4.7
μ
s
t
DHDL
t
BUF
Input High to Input Low (Bus Free)
4.7
μ
s
t
CLQV (2)
t
AA
Clock Low to Next Data Out Valid
0.3
3.5
μ
s
t
CLQX
t
DH
Data Out Hold Time
300
ns
f
C
f
SCL
Clock Frequency
100
kHz
t
W
(3)
t
WR
Write Time
10
ms
Notes:
1. For a reSTART condition, or following a write cycle.
2. The minimum value delays the falling/rising edge of SDA away from SCL = 1 in order to avoid unwanted START and/or STOP
conditions.
3. In the Multibyte Write mode only, if accessed bytes are on two consecutive 8 bytes rows (5 address MSB are not constant)
the maximum programming time is doubled to 20ms.
Table 7. AC Characteristics
(T
A
= 0 to 70
°
C or –40 to 85
°
C; V
CC
= 4.5V to 5.5V or 2.5V to 5.5V)
DEVICE OPERATION
I
2
C Bus Background
The ST24/25x16 support the I
2
C protocol. This
protocol defines any device that sends data onto
the bus as a transmitter and any device that reads
the data as a receiver. The device that controls the
data transfer is known as the master and the other
as the slave. The master will always initiate a data
transfer and will provide the serial clock for syn-
chronisation. The ST24/25x16 are always slave
devices in all communications.
Start Condition.
START is identified by a high to
low transition of the SDA line while the clock SCL
is stable in the high state. A START condition must
precede any command for data transfer. Except
during a programming cycle, the ST24/25x16 con-
tinuously monitor the SDA and SCL signals for a
START condition and will not respond unless one
is given.
AI00825
0.8VCC
0.2VCC
0.7VCC
0.3VCC
Figure 4. AC Testing Input Output Waveforms
Input Rise and Fall Times
50ns
Input Pulse Voltages
0.2V
CC
to 0.8V
CC
Input and Output Timing Ref.
Voltages
0.3V
CC
to 0.7V
CC
Table 8. AC Measurement Conditions
6/17
ST24/25C16, ST24/25W16
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