NCA9545-DTSR 4-channel I2C-bus switch with interrupt logic and reset
| Price: |
$0.29-$0.35 |
$0.6-$1.5 |
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Replace parts:
Replace chip:
Replacement parts:
Replacement chip:
Alternative parts:
Alternative chip:
Pin to pin parts:
Pin 2 pin parts:
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NCA9545-DTSR |
TCA9545APWR
PCA9545ADW
PCA9545ADWR
PCA9545APW
PCA9545APWR
PCA9545APWT
PCA9545ARGYR
PCA9545ARGYRG4
TCA9545APWR
PCA9544ADGVR
PCA9544ADW
PCA9544ADWR
PCA9544APW
PCA9544APWE4
PCA9544APWR
PCA9544APWRG4
PCA9544APWT
TCA9544APWR
PCA9544ARGYR
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The NCA9545 is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the
programmable control register. Four interrupt inputs (INT3–INT0), one for each of the downstream pairs, are provided. One interrupt (INT) output acts as an AND of the four interrupt inputs. An active-low reset (RESET) input allows the NCA9545 to recover from a situation in which one of the downstream I2C buses is stuck in a low state. Pulling RESET low resets the I2C state machine and causes all the channels to be deselected, as does the internal power-on reset function.
The pass gates of the switches are constructed such that the VCC terminal can be used to limit the maximum high voltage, which will be passed by the NCA9545. This allows the use of different bus voltages on each pair, so that 1.8-V, 2.5-V, or 3.3-V parts can communicate with 5-V parts, without any additional protection. External pull-up resistors pull the bus up to the desired voltage level for each channel. All I/O terminals are 5.5 V tolerant
Product Specification
| Operating power-supply voltage |
range of 2. 3V to 5.5 V |
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Clock Frequency
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0 to 400-kHz
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| Applications |
Servers
Routers (Telecom Switching Equipment)
Factory Automation
Products With I2C Slave Address Conflicts (e.g. Multiple,Identical Temp Sensors)
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| Package options |
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Features
1-of-4 Bidirectional Translating Switches
I2C Bus and SMBus Compatible
Four Active-Low Interrupt Inputs
Active-Low Interrupt Output
Active-Low Reset Input
Two Address Terminals, Allowing up to Four Devices on the I2C Bus
Channel Selection via I2C Bus, in Any Combination
Power-Up With All Switch Channels Deselected
Low RON Switches
Allows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V Buses
No Glitch on Power-Up
Supports Hot Insertion
Low Standby Current
Operating Power-Supply Voltage Range of 2.3 V to 5.5 V
5.5 V Tolerant Inputs
0 to 400-kHz Clock Frequency
Latch-Up Performance Exceeds 100 mA per JESD 78
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 1000-V Charged-Device Model (C101)
Applications
Servers
Routers (Telecom Switching Equipment)
Factory Automation
Products With I2C Slave Address Conflicts (e.g. Multiple,Identical Temp Sensors)
Packing & Delivery:
1. Shipping Method: Express (SF Express, DHL, TNT, FedEx, etc.), shipping charges are paid by the buyer.
2. Packaging Method: pressure-proof, moisture proof, shock-proof packaging.
3. Shipping Time: In stock items: 3-5 days. Lead Time orders: 45-65 days.
ONE-STOP Electronic Parts Supply Chain:
1. 18 years of experience in the electronic components industry
2. Online service provided by over 80+ sales and technical.
3. Serving over 4500 global customers.
4. Annual sales exceeding 50 million USD, have an upward trend every year.
5. During the industry downturn, our sales of Chinese brand chips increased against the trend. Contributed a significant portion of the company's performance.
6. In the recently years, most customers have reduced costs and adopted Chinese chip brands. From initially worrying about quality and not daring to try them out, our customers now are continuing to place orders every month.
7. Our Product line includes MCU, amplifiers, isolation devices, logic devices, power devices, etc.
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