Datasheet

DS4550
I
2
C and JTAG Nonvolatile 9-Bit I/O
Expander Plus Memory
_____________________________________________________________________ 5
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS4550 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
54.543.53
0.5
1
1.5
2
0
2.5 5.5
I/O0-I/O7 CONTROL BITS = 0
I/O0-I/O7 PULLUPS DISABLED
V
CC
= SDA = SCL = TCK
SUPPLY CURRENT
vs. TEMPERATURE
DS4550 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
806040200-20
0.5
1
1.5
2
2.5
0
-40
V
CC
= SDA = SCL = 5.5V = TCK
V
CC
= SDA = SCL = 2.7V = TCK
I/O0-I/O7 CONTROL BITS = 0
I/O0-I/O7 PULLUPS DISABLED
SUPPLY CURRENT
vs. SCL FREQUENCY
DS4550 toc03
SCL FREQUENCY (kHz)
SUPPLY CURRENT (µA)
300200100
2
4
6
8
10
12
14
16
18
20
0
0400
V
CC
= SDA = TCK = 5.0V
V
CC
= SDA = TCK = 2.7V
SUPPLY CURRENT
vs. TCK FREQUENCY
DS4550 toc04
TCK FREQUENCY (kHz)
SUPPLY CURRENT (µA)
1750150012501000750500250
5
10
15
20
25
0
02000
V
CC
= 5.0V
V
CC
= 2.7V
SDA = SCL = V
CC
I/O OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
DS4550 toc05
SUPPLY VOLTAGE (V)
I/O OUTPUT VOLTAGE (V)
54321
1
2
3
4
5
0
0
PULL-UPS ENABLED
PULL-DOWNS DISABLED
HIGH IMPEDANCE
EEPROM RECALL AT V
POR
Typical Operating Characteristics
(V
CC
= +5.0V, T
A
= +25°C; TDI, TDO, TMS pins are no connects, unless otherwise noted.)