具有中断输出的远程 16 位 I2C 和 SMBus I/O 扩展器
This 16-bit I/O expander for the two-line bidirectional bus I2C is designed for 4.5-V to 5.5-V VCC operation.
The provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface serial clock SCL and serial data SDA.
The device features a 16-bit quasi-bidirectional input/output I/O port P07–P00, P17–P10, including latched outputs with high-current drive capability for directly driving LEDs. Each quasi-bidirectional I/O can be used as an input or output without the use of a data-direction control signal. At power on, the I/Os are in 3-state mode. The strong pullup to VCC allows fast-rising edges into heavily loaded outputs. This device turns on when an output is written high and is switched off by the negative edge of SCL. The I/Os should be high before being used as inputs. After power on, as all the I/Os are set to 3-state, all of them can be used as inputs. Any change in setting of the I/Os as either inputs or outputs can be done with the write mode. If a high is applied externally to an I/O that has been written earlier to low, a large current IOL flows to GND.
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- I2C to Parallel-Port Expander
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- Open-Drain Interrupt Output
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- Low Standby-Current Consumption of
10 µA Maximum
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- Compatible With Most Microcontrollers
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- 400-kHz Fast I2C Bus
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- Address by Three Hardware Address Pins
for Use of up to Eight Devices
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- Latched Outputs With High-Current Drive
Capability for Directly Driving LEDs
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- Latch-Up Performance Exceeds 100 mA
Per JESD 78, Class II
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- ESD Protection Exceeds JESD 22
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- 2000-V Human-Body Model
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- 200-V Machine Model
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- 1000-V Charged-Device Model