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Maxim > Solutions > Ultrasound
Key Switch Controllers
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| Display |
Title/Parts |
Key Advantages |
| QV PDF |
Low-Charge-Injection, 16-Channel, High-Voltage Analog Switches
MAX14800, MAX14801, MAX14802, MAX14803
| Series Offers Low-Charge Injection, Integrated Overvoltage Protection, Low Capacitance, and Fast SPI Interface |
| QV PDF |
Low-Charge-Injection, 8-Channel, High-Voltage Analog Switches with 20MHz Serial Interface
MAX4800A, MAX4802A
| Series Offers Low Charge Injection, Low Capacitance, and Fast SPI Interface |
| QV PDF |
2-Wire Interfaced Low-EMI Key Switch Controller/GPO
MAX7359
| Low-Voltage, Low-EMI, and Low-Supply Current Key-Switch Controller Monitors Up to 64 Keys Without External Components |
| QV PDF |
2-Wire Interfaced Low-EMI Key Switch and Sounder Controllers
MAX7347, MAX7348, MAX7349
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| Key Specifications: Keyswitch Controllers |
| Part Number |
Interface |
Keys |
I2C I/F Volt. |
ISUPPLY
(µA) |
ISHUTDN
(µA) |
Interr. Out |
Key Scan I2C Slave IDs |
Sounder I2C Slave IDs |
Sounder Output |
GPOs |
ALERT Input |
VSUPPLY
(V) |
Package/Pins |
| max |
typ |
typ |
| MAX7347 |
Serial 2-Wire 400kbit |
24 |
2.4 to 5.5 |
75 |
7.5 |
Yes |
4 |
4 |
Yes |
6 + 1(INT) |
Yes |
2.4 to 3.6 |
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| MAX7348 |
40 |
4 |
4 |
Yes |
3 + 1(INT) |
- |
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| MAX7349 |
64 |
1 |
- |
- |
1 + 1(INT) |
- |
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See All Keyswitch Controllers (3)
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| Key Specifications: Switches and Multiplexers (Low Voltage) |
| Part Number |
Functions |
Config. |
Channels |
Normal Position |
VSUPPLY (Single)
(V) |
VSUPPLY (Single)
(V) |
VSUPPLY (Dual)
(±V) |
VSUPPLY (Dual)
(±V) |
BW
(MHz) |
IL(OFF)
(nA) |
tON
(ns) |
tOFF
(ns) |
CON
(pF) |
COFF
(pF) |
| min |
max |
min |
max |
max |
min |
max |
max |
max |
| MAX4800A |
Switch |
SPST |
8 |
Open |
40 |
200 |
40 |
100 |
20 |
2000 |
5000 |
5000 |
36 |
11 |
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See All Switches and Multiplexers (Low Voltage) (160)
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| Key Specifications: Switches and Multiplexers (Mid Voltage) |
| Part Number |
Functions |
Config. |
Channels |
Normal Position |
VSUPPLY (Single)
(V) |
VSUPPLY (Single)
(V) |
VSUPPLY (Dual)
(±V) |
VSUPPLY (Dual)
(±V) |
BW
(MHz) |
IL(OFF)
(nA) |
tON
(ns) |
tOFF
(ns) |
CON
(pF) |
COFF
(pF) |
| min |
max |
min |
max |
max |
min |
max |
max |
max |
| MAX4800A |
Switch |
SPST |
8 |
Open |
40 |
200 |
40 |
100 |
20 |
2000 |
5000 |
5000 |
36 |
11 |
| MAX4802A |
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See All Switches and Multiplexers (Mid Voltage) (297)
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