ST24E16 查看數據表（PDF） - STMicroelectronics
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ST24E16 Datasheet PDF : 16 Pages
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ST24E16, ST25E16
Table 7. AC Characteristics
(TA = 0 to 70 °C or –40 to 85 °C; VCC = 4.5V to 5.5V or 2.5V to 5.5V)
Symbol
Alt
Parameter
Min
Max
Unit
tCH1CH2
tR
Clock Rise Time
300
ns
tCL1CL2
tDH1DH2 (1)
tDL1DL1 (1)
tCHDX (2)
tF
tR
tF
tSU:STA
Clock Fall Time
SDA Rise Time
SDA Fall Time
Clock High to Input Transition
300
ns
20
300
ns
20
300
ns
600
ns
tCHCL
tHIGH
Clock Pulse Width High
600
ns
tDLCL
tHD:STA
Input Low to Clock Low (START)
600
ns
tCLDX
tHD:DAT
Clock Low to Input Transition
0
µs
tCLCH
tLOW
Clock Pulse Width Low
1.3
µs
tDXCX
tSU:DAT
Input Transition to Clock Transition
100
ns
tCHDH
tSU:STO Clock High to Input High (STOP)
600
ns
tDHDL
tCLQV (3)
tBUF
Input High to Input Low (Bus Free)
tAA
Clock Low to Next Data Out Valid
1.3
µs
200
1000
ns
tCLQX
tDH
Data Out Hold Time
200
ns
fC
fSCL
Clock Frequency
400
kHz
tW
tWR
Write Time
10
ms
Notes: 1. Sampled only, not 100% tested.
2. For a reSTART condition, or following a write cycle.
3. 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 Measurement Conditions
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref.
Voltages
≤ 50ns
0.2VCC to 0.8VCC
0.3VCC to 0.7VCC
Figure 4. AC Testing Input Output Waveforms
0.8VCC
0.2VCC
0.7VCC
0.3VCC
AI00825
DEVICE OPERATION (cont’d)
Memory Addressing. A data byte in the memory
is addressed through 2 bytes of address informa-
tion. The Most Significant Byte is sent first and the
Least significant Byte is sent after. The Least Sig-
nificant Byte addresses a block of 256 bytes, bits
b10,b9,b8 of the Most Significant Byte select one
block among 8 blocks (one block is 256 bytes).
Most Significant Byte
X X X X X b10 b9 b8
X = Don’t Care.
Least Significant Byte
b7 b6 b5 b4 b3 b2 b1 b0
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