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ST24LW21 Datasheet(PDF) 11 Page - STMicroelectronics

Part # ST24LW21
Description  1 Kbit x8 Dual Mode Serial EEPROM for VESA PLUG & PLAY
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST24LW21 Datasheet(HTML) 11 Page - STMicroelectronics

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background image
Symbol
Alt
Parameter
Min
Max
Unit
tCH1CH2
tR
Clock Rise Time
1
µs
tCL1CL2
tF
Clock Fall Time
300
ns
tDH1DH2
tR
Input Rise Time
1
µs
tDL1DL1
tF
Input Fall Time
300
ns
tCHDX
(1)
tSU:STA
Clock High to Input Transition
4.7
µs
tCHCL
tHIGH
Clock Pulse Width High
4
µs
tDLCL
tHD:STA
Input Low to Clock Low (START)
4
µs
tCLDX
tHD:DAT
Clock Low to Input Transition
0
µs
tCLCH
tLOW
Clock Pulse Width Low
4.7
µs
tDXCX
tSU:DAT
Input Transition to Clock Transition
250
ns
tCHDH
tSU:STO
Clock High to Input High (STOP)
4.7
µs
tDHDL
tBUF
Input High to Input Low (Bus Free)
4.7
µs
tCLQV
(2)
tAA
Clock Low to Next Data Out Valid
0.2
3.5
µs
tCLQX
tDH
Data Out Hold Time
200
ns
fC
fSCL
Clock Frequency
100
kHz
tW
tWR
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.
Table 8. AC Characteristics, I2C Bidirectional Mode for Clock Frequency = 100kHz
(TA = –40 to 85
°C; VCC = 3.6V to 5.5V)
Symbol
Alt
Parameter
Min
Max
Unit
tVCHQX
tVAA
Output Valid from VCLK
500
ns
tVCHVCL
tVHIGH
VCLK High Time
600
ns
tVCLVCH
tVLOW
VCLK Low Time
1.3
µs
tCLQZ
tVHZ
Mode Tansition Time
500
ns
tVPU
(1,2)
Transmit-only Power-up Time
0
ns
tVH1VH2
(2)
tR
VCLK Rise Time
1
µs
tVL1VL2
(2)
tF
VCLK Fall Time
1
µs
tRECOVERY
(2)
Recovery Time
1.5
3.5
sec
Notes: 1. Refer to Figure 3.
2. Sampled only, not 100% tested.
Table 9. AC Characteristics, Transmit-only Mode
(TA = –40 to 85
°C; VCC = 3.6V to 5.5V)
11/22
ST24LC21B, ST24LW21, ST24FC21, ST24FC21B, ST24FW21


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