Table 10. WRITE CYCLE LIMITS (Note 10) Symbol Parameter Max Units
參數(shù)資料
型號: CAT5259YI-00-T2
廠商: ON Semiconductor
文件頁數(shù): 12/15頁
文件大?。?/td> 0K
描述: IC POT DPP 100K 256TAP 24TSSOP
標準包裝: 2,000
接片: 256
電阻(歐姆): 100k
電路數(shù): 4
溫度系數(shù): 標準值 300 ppm/°C
存儲器類型: 非易失
接口: I²C(設(shè)備位址)
電源電壓: 2.5 V ~ 6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 帶卷 (TR)
CAT5259
http://onsemi.com
6
Table 10. WRITE CYCLE LIMITS (Note 10)
Symbol
Parameter
Max
Units
tWR
Write Cycle Time
5
ms
Table 11. RELIABILITY CHARACTERISTICS
Symbol
Parameter
Reference Test Method
Min
Max
Units
NEND (Note 11)
Endurance
MILSTD883, Test Method 1033
1,000,000
Cycles/Byte
TDR (Note 11)
Data Retention
MILSTD883, Test Method 1008
100
Years
VZAP (Note 11)
ESD Susceptibility
MILSTD883, Test Method 3015
2000
V
ILTH (Note 11)
Latch-up
JEDEC Standard 17
100
mA
10.The write cycle is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During the write
cycle, the bus interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its slave address.
11. This parameter is tested initially and after a design or process change that affects the parameter.
Figure 2. Bus Timing
SCL
SDA IN
SDA OUT
tBUF
tSU:STO
tR
tLOW
tSU:DAT
tHD:DAT
tDH
tHD:STA
tSU:STA
tAA
tLOW
tF
tHIGH
SERIAL BUS PROTOCOL
The following defines the features of the I2C bus protocol:
1. Data transfer may be initiated only when the bus is
not busy.
2. During a data transfer, the data line must remain
stable whenever the clock line is high. Any
changes in the data line while the clock is high
will be interpreted as a START or STOP condition.
The device controlling the transfer is a master, typically a
processor or controller, and the device being controlled is the
slave. The master will always initiate data transfers and
provide the clock for both transmit and receive operations.
Therefore, the CAT5259 will be considered a slave device
in all applications.
START Condition
The START Condition precedes all commands to the
device, and is defined as a HIGH to LOW transition of SDA
when SCL is HIGH. The CAT5259 monitors the SDA and
SCL lines and will not respond until this condition is met.
STOP Condition
A LOW to HIGH transition of SDA when SCL is HIGH
determines the STOP condition. All operations must end
with a STOP condition.
DEVICE ADDRESSING
The bus Master begins a transmission by sending a
START condition. The Master then sends the address of the
particular slave device it is requesting. The four most
significant bits of the 8-bit slave address are fixed as 0101
for the CAT5259 (see Figure 6). The next four significant
bits (A3, A2, A1, A0) are the device address bits and define
which device the Master is accessing. Up to sixteen devices
may be individually addressed by the system. Typically,
+5 V and ground are hard-wired to these pins to establish the
device’s address.
After the Master sends a START condition and the slave
address byte, the CAT5259 monitors the bus and responds
with an acknowledge (on the SDA line) when its address
matches the transmitted slave address.
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