HT1382 Просмотр технического описания (PDF) - Holtek Semiconductor
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HT1382 Datasheet PDF : 29 Pages
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HT1382
I2C/3-Wire Real Time Clock
I2C Interface
Symbol
Parameter
Remark
Min.
fSCL
tHIGH
tLOW
tr
tf
tHD:STA
Clock frequency
Clock High Time
Clock Low Time
SDA and SCL Rise Time
SDA and SCL Fall Time
START Condition Hold Time
¾
¾
¾
Note
Note
After this period, the first clock pulse
is generated.
¾
600
1300
¾
¾
600
tSU:STA
START Condition Setup Time
Only relevant for repeated START
condition.
600
tHD:DAT
tSU:DAT
tSU:STO
tAA
tBUF
Data Input Hold Time
Data Input Setup Time
STOP Condition Setup Time
Output Valid from Clock
Bus Free Time
¾
0
¾
100
¾
600
¾
¾
Time in which the bus must be free
before a new transmission can start
1300
tSP
Input Filter Time Constant
(SDA and SCL Pins)
Noise suppression time
¾
Note: These parameters are periodically sampled but not 100% tested
Typ.
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
Max.
400
¾
¾
300
300
¾
¾
¾
¾
¾
900
¾
50
Unit
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3-wire Interface
Symbol
Parameter
fSCLK
Serial Clock
tDC
Data to Clock Setup
tCDH
Clock to Data Hold
tCDD
Clock to Data Delay
tCL
Clock Low Time
tCH
Clock High Time
tr
Clock Rise and Fall time
tf
Test Conditions
VDD
Conditions
3V
¾
5V
¾
3V
¾
5V
¾
3V
¾
5V
¾
3V
¾
5V
¾
3V
¾
5V
¾
3V
¾
5V
¾
3V
¾
5V
¾
Ta=-40°C~85°C
Min. Typ. Max. Unit
¾
¾
1 MHz
¾
¾
2 MHz
100
¾
¾
ns
50
¾
¾
ns
140
¾
¾
ns
70
¾
¾
ns
¾
¾
400
ns
¾
¾
200
ns
500
¾
¾
ns
250
¾
¾
ns
500
¾
¾
ns
250
¾
¾
ns
¾
¾ 1000 ns
¾
¾
500
ns
Rev. 1.40
6
May 27, 2011
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