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Maxim > Solutions > Ultrasound
Key Switch Controllers
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| Display |
Title / Parts |
Key Advantages |
| 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 |
Max. Keys |
I2C Interface Voltage |
Typ. Supply Current (µA) |
Typ. Shutdown Current (µA) |
INT Output |
Key Scan I2C Slave IDs |
Sounder I2C Slave IDs |
Sounder Output |
GPOs |
ALERT Input |
Supply Voltage (V) |
Package |
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MAX7347
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Serial 2-Wire 400kbit
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24
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2.4 to 5.5
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75
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7.5
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Yes
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4
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4
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Yes
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6 + 1(INT)
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Yes
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2.4 to 3.6
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QSOP/16
THIN QFN/16
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MAX7348
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Serial 2-Wire 400kbit
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40
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2.4 to 5.5
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75
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7.5
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Yes
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4
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4
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Yes
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3 + 1(INT)
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-
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2.4 to 3.6
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QSOP/20
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MAX7349
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Serial 2-Wire 400kbit
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64
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2.4 to 5.5
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75
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7.5
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Yes
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1
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-
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-
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1 + 1(INT)
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-
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2.4 to 3.6
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QSOP/24
THIN QFN/24
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| See All Keyswitch Controllers (3) |
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