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參數資料
| 型號： | ST24LC21BM6 |
| 英文描述： | IC CONFIG DEVICE 16MBIT 100-PQFP |
| 中文描述： | I2C串行EEPROM的 |
| 文件頁數： | 3/21頁 |
| 文件大小： | 152K |
| 代理商： | ST24LC21BM6 |
Symbol
Parameter
Value
Unit
T
A
Ambient Operating Temperature
–40 to 85
°
C
T
STG
Storage Temperature
–65 to 150
°
C
T
LEAD
Lead Temperature, Soldering
(SO8 package)
(PSDIP8 package)
40 sec
10 sec
215
260
°
C
V
IO
Input or Output Voltages
–0.3 to 6.5
V
V
CC
Supply Voltage
–0.3 to 6.5
V
V
ESD
Electrostatic Discharge Voltage (Human Body model)
(2)
4000
V
Electrostatic Discharge Voltage (Machine model)
(3)
500
V
Notes:
1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings"
may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other
conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum
Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other
relevant quality documents.
2. MIL-STD-883C, 3015.7 (100pF, 1500
).
3. EIAJ IC-121 (Condition C) (200pF, 0
).
Table 2. Absolute Maximum Ratings
(1)
Device Code
Chip Enable
RW
Bit
b7
b6
b5
b4
b3
b2
b1
b0
Device Select
1
0
1
0
X
X
X
RW
Note:
The MSB b7 is sent first.
X = 0 or 1.
Table 3. Device Select Code
The ST24xy21 can operate in two modes: Trans-
mit-Only mode and I
2
C bidirectional mode. When
powered, the device is in Transmit-Only mode with
EEPROM data clocked out from the rising edge of
the signal applied on VCLK.
The device will switch to the I
2
C bidirectional mode
upon the falling edge of the signal applied on SCL
pin. When in I
2
C mode, the ST24LC21B (or the
ST24LW21) cannot switch back to the Transmit
Only mode (except when the power supply is re-
moved). For the ST24FC21 (or the ST24FW21),
after the falling edge of SCL, the memory enter in
a transition state which allowed to switch back to
the Transmit-Only mode if no valid I
2
C activity is
observed. The device operates with a power supply
value as low as +3.6V. Both Plastic Dual-in-Line
and Plastic Small Outline packages are available.
Transmit Only Mode
After a Power-up, the ST24xy21 is in the Transmit
Only mode. A proper initialization sequence (see
Figure 3) must supply nine clock pulses on the
VCLK pin (in order to internally synchronize the
device). During this initialization sequence, the
SDA pin is in high impedance. On the rising edge
of the tenth pulse applied on VCLK pin, the device
will output the first bit of byte located at address 00h
(most significant bit first).
A byte is clocked out (on SDA pin) with nine clock
pulses on VCLK: 8 clock pulses for the data byte
and one extra clock pulse for a Don’t Care bit.
As long as the SCL pin is held high, each byte of
the memory array is transmitted serially on the SDA
pin with an automatic address increment.
When the last byte is transmitted, the address
counter will roll-over to location 00h.
DESCRIPTION
(cont’d)
3/21
ST24LC21B, ST24LW21, ST24FC21, ST24FW21
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ST24LC21BM6TR | 功能描述:電可擦除可編程只讀存儲器 Dual Mode 1K (128x8) RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數據保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| ST24LC21M1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| ST24LC21M1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1Kb x8 DUAL MODE SERIAL EEPROM for VESA Plug&Play |
| ST24LW21 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY |
| ST24LW21B1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
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