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DS4550 Datasheet(PDF) 3 Page - Dallas Semiconductor

Part # DS4550
Description  I2C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory
PDF  18 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS4550 Datasheet(HTML) 3 Page - Dallas Semiconductor

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I2C and JTAG Nonvolatile 9-Bit I/O
Expander Plus Memory
_____________________________________________________________________
3
AC ELECTRICAL CHARACTERISTICS-–I2C Interface (See Figure 5)
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Timing referenced to VIL(MAX) and VIH(MIN).)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SCL Clock Frequency
fSCL
(Note 4)
0
400
kHz
Bus Free Time Between Stop and
Start Conditions
tBUF
1.3
µs
Hold Time (Repeated) Start
Condition
tHD:STA
(Note 5)
0.6
µs
Low Period of SCL
tLOW
1.3
µs
High Period of SCL
tHIGH
0.6
µs
Data Hold Time
tHD:DAT
0
0.9
µs
Data Setup Time
tSU:DAT
100
ns
Start Setup Time
tSU:STA
0.6
µs
SDA and SCL Rise Time
tR
(Note 6)
20 +
0.1CB
300
ns
SDA and SCL Fall Time
tF
(Note 6)
20 +
0.1CB
300
ns
Stop Setup Time
tSU:STO
0.6
µs
SDA and SCL Capacitive
Loading
CB
(Note 6)
400
pF
EEPROM Write Time
tWR
I
2C EEPROM write (Note 7)
10
20
ms
AC ELECTRICAL CHARACTERISTICSJTAG Interface (See Figure 1)
(VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TCK Clock Period
t1
1000
ns
TCK Clock High/Low Time
t2, t3
(Note 8)
50
500
ns
TCK to TDI, TMS Setup Time
t4
15
ns
TCK to TDI, TMS Hold Time
t5
10
ns
TCK to TDO Delay
t6
50
ns
TCK to TDO High-Z Delay
t7
50
ns
EEPROM Write Time
tWR
JTAG EEPROM write (Note 9)
10
20
ms



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