DS4550 Maxim, DS4550 Datasheet - Page 3

• Manufacturer Part Number: DS4550
• Description: The DS4550 is a 9-bit, nonvolatile (NV) I/O expander with 64 bytes of NV user memory controlled by either an I²C-compatible serial interface or an IEEE® 1149
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS-–I
(V
AC ELECTRICAL CHARACTERISTICSJTAG Interface (See
(V
SCL Clock Frequency
Bus Free Time Between Stop and
Start Conditions
Hold Time (Repeated) Start
Condition
Low Period of SCL
High Period of SCL
Data Hold Time
Data Setup Time
Start Setup Time
SDA and SCL Rise Time
SDA and SCL Fall Time
Stop Setup Time
SDA and SCL Capacitive
Loading
EEPROM Write Time
TCK Clock Period
TCK Clock High/Low Time
TCK to TDI, TMS Setup Time
TCK to TDI, TMS Hold Time
TCK to TDO Delay
TCK to TDO High-Z Delay
EEPROM Write Time
CC
CC
= +2.7V to +5.5V, T
= +2.7V to +5.5V, T
PARAMETER
PARAMETER
A
A
= -40°C to +85°C, unless otherwise noted. Timing referenced to V
= -40°C to +85°C, unless otherwise noted.)
SYMBOL
SYMBOL
I
t
t
t
t
t
HD:STA
HD:DAT
SU:DAT
SU:STO
SU:STA
t
t
t
2
f
HIGH
t
LOW
t
BUF
t
SCL
C
2
WR
t
WR
t
t
t
t
t
t
R
, t
F
1
4
5
6
7
B
C and JTAG Nonvolatile 9-Bit I/O
_____________________________________________________________________
3
(Note 4)
(Note 5)
(Note 6)
(Note 6)
(Note 6)
I
(Note 8)
JTAG EEPROM write (Note 9)
2
C EEPROM write (Note 7)
2
C Interface (See
CONDITIONS
CONDITIONS
Expander Plus Memory
Figure
Figure
IL(MAX)
0.1C
0.1C
20 +
20 +
MIN
100
MIN
1.3
0.6
1.3
0.6
0.6
0.6
5)
50
15
10
0
0
and V
B
B
1)
IH(MIN)
1000
TYP
TYP
500
10
10
.)
MAX
MAX
400
300
300
400
0.9
20
50
50
20
UNITS
UNITS
kHz
ms
pF
ms
µs
µs
µs
µs
µs
ns
µs
ns
ns
µs
ns
ns
ns
ns
ns
ns
3