DS4550 Datasheet, PDF (5/18 Pages) Dallas Semiconductor – I2C and JTAG Nonvolatile 9-Bit I/O Expander Plus Memory

I²C and JTAG Nonvolatile 9-Bit I/O
Expander Plus Memory
Typical Operating Characteristics
(V_CC = +5.0V, T_A = +25°C; TDI, TDO, TMS pins are no connects, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
2
I/O0-I/O7 CONTROL BITS = 0
I/O0-I/O7 PULLUPS DISABLED
V_CC = SDA = SCL = TCK
1.5
1
0.5
0
2.5 3 3.5 4 4.5 5 5.5
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. TEMPERATURE
2.5
I/O0-I/O7 CONTROL BITS = 0
I/O0-I/O7 PULLUPS DISABLED
2
1.5
V_CC = SDA = SCL = 5.5V = TCK
1
0.5
V_CC = SDA = SCL = 2.7V = TCK
0
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
SUPPLY CURRENT
vs. SCL FREQUENCY
20
18
16
14
12 _{VCC = SDA = TCK = 5.0V}
10
8
6
4
2
V_CC = SDA = TCK = 2.7V
0
0
100
200
300
400
SCL FREQUENCY (kHz)
SUPPLY CURRENT
vs. TCK FREQUENCY
25
SDA = SCL = V_CC
20
15
V_CC = 5.0V
10
5
V_CC = 2.7V
0
0 250 500 750 1000 1250 1500 1750 2000
TCK FREQUENCY (kHz)
I/O OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE
5
PULL-UPS ENABLED
PULL-DOWNS DISABLED
4
3 _{HIGH IMPEDANCE}
2
EEPROM RECALL AT V_POR
1
0
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
_____________________________________________________________________ 5