DS4550 Maxim, DS4550 Datasheet - Page 5

• 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

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