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I/O Expanders, Repeaters & Hubs HOTSWAP LVTTL I2C-BUS REPEATER
| メーカー : | NXP Semiconductor |
|---|---|
| パッケージ : | SOP8 |
| 製品 : | I/O Expanders, Repeaters & Hubs |
| Datasheet: | PCA9508D Datasheet (PDF) |
| RoHs Status: | Rohs |
| 在庫: | 700 |
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PCA9508D 製品詳細
The PCA9508D is a CMOS integrated circuit that supports hot-swap with zero offset and provides level shifting between low voltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) for I²C-bus or SMBus applications. While retaining all the operating modes and features of the I²C-bus system during the level shifts, it also permits extension of the I²C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Using the PCA9508D enables the system designer to isolate two halves of a bus for both voltage and capacitance, and perform hot-swap and voltage level translation. Furthermore, the dual supply pins can be powered up in any sequence; when any of the supply pins are unpowered, the 5 V tolerant I/O are high-impedance.
The hot swap feature allows an I/O card to be inserted into a live backplane without corrupting the data and clock buses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. Zero offset output voltage allows multiple PCA9508s to be put in series and still maintains an excellent noise margin.
PCA9508D has B side and A side bus drivers. The 2.7 V to 5.5 V bus B side drivers behave much like the drivers on the PCA9515A device, while the adjustable voltage bus A side drivers drive more current and incur no static offset voltage. This results in a LOW on the B side translating into a nearly 0 V LOW on the A side.
The static offset design of the B side PCA9508D I/O drivers prevents them from being connected to another device that has a rise time accelerator including the PCA9510/A, PCA9511/A, PCA9512/A, PCA9513/A, or PCA9514/A or a static offset voltage including the PCA9507 (B side), PCA9508D (B side), PCA9509 (A side), PCA9515/A, PCA9516A, PCA9517/A (B side), PCA9518, PCA9519 (A side), or P82B96/PCA9600 (Sx/Sy side). The A side of two or more PCA9508s can be connected together, however, to allow a star topology with the A side on the common bus, and the A side can be connected directly to any other buffer with static or dynamic offset voltage. Multiple PCA9508s can be connected in series, A side to B side, with no build-up in offset voltage with only time-of-flight delays to consider.
The PCA9508D drivers are not enabled unless the bus is idle, VCC(A) is above 0.8 V and VCC(B) is above 2.5 V. The EN pin can also be used to turn the drivers on and off under system control. Caution should be observed to only change the state of the enable pin when the bus is idle.
The output pull-down on the B side internal buffer LOW is set for approximately 0.5 V, while the input threshold of the internal buffer is set about 70 mV lower (0.43 V). When the B side I/O is driven LOW internally, the LOW is not recognized as a LOW by the input. This prevents a lock-up condition from occurring. The output pull-down on the A side drives a hard LOW and the input level is set at 0.5VCC(A) to accommodate the need for a lower LOW level in systems where the low voltage side supply voltage is as low as 0.9 V.
アプリケーション/パラメータの範囲
- 2 channel, bidirectional buffer isolates capacitance and allows 400 pF on either side of the device
- Supports offset-free hot-swap with IDLE/STOP detect circuitry
- Voltage level translation from 0.9 V to 5.5 V and from 2.7 V to 5.5 V
- Footprint and functional replacement for PCA9515, PCA9515A, PCA9517 and PCA9517A
- I²C-bus and SMBus compatible
- Active HIGH repeater enable input
- Static level offset on B side
- Open-drain input/outputs
- Lock-up free operation
- Supports arbitration and clock stretching across the repeater
- Accommodates Standard-mode and Fast-mode I²C-bus devices and multiple masters
- Powered-off high-impedance I²C-bus pins
- A side operating supply voltage range of 0.9 V to 5.5 V
- B side operating supply voltage range of 2.7 V to 5.5 V
- 5 V tolerant I²C-bus and enable pins
- 0 Hz to 400 kHz clock frequency (the maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater).
- ESD protection exceeds 6000 V HBM per JESD22-A114, 450 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
- Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
- Packages offered: SO8 and TSSOP8
(商品画像: Diagram)
技術的パラメータ
- Product Type
- Repeaters
- Packaging
- Tube
- Factory Pack Quantity
- 100
- Part # Aliases
- PCA9508D,112
PCA9508D Datasheet
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PCA9508 NXP Technical Data
PCA9508D 同等の部分
PCA9508Dコンポーネントには、これらの交換部品や代替部品を検討することができます。
| モデル | メーカー | パッケージ | 備考 |
|---|---|---|---|
| PCA9508BS | |||
| PCA9508DP | NXP | 8-TSSOP | Hot swappable level translating I2C-bus repeater |
| PCA9508PW |
PCA9508D 特殊な製品に関連する
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すべての製品の90日間の品質保証。
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Step1: Products
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Step2: Vacuum Packaging
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Step3: Anti-Static Bag
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Step4: Individual Packaging
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Step5: Packaging Boxes
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Step6: Bar-Code Shipping Tag
All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
保証
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
FAQ:
- Q: How does Jotrin guarantee that PCA9508D is the original manufacturer or agent of NXP?
- We have a professional business development department to strictly test and verify the qualifications of NXP original manufacturers and agents. All NXP suppliers must pass the qualification review before they can publish their PCA9508D devices; we pay more attention to the channels and quality of PCA9508D products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
- Q: How to find the detailed information of PCA9508D chips? Including NXP original factory information, I/O Expanders, Repeaters & Hubs application, PCA9508D pictures?
- You can use Jotrin's intelligent search engine, or filter by Interfaces ; I2C, SPI, Serial Interface Devices ; I2C Voltage Level Translators category, or find it through NXP Semiconductor Information page.
- Q: Are the NXP's PCA9508D price and stock displayed on the platform accurate?
- The NXP's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for PCA9508D, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
- Q: Can I place an order offline?
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Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online. - Q: What forms of payment can I use in Jotrin?
- TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
- Q: How is the shipping arranged and track my package?
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Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days. - Q: What is the process for returns or replacement of PCA9508D?
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All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment.
If there is something wrong with the PCA9508D we delivered, we will accept the replacement or return of the PCA9508D only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of PCA9508D.
(3)The PCA9508D is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy. - Q: How to contact us and get support, such as PCA9508D datasheet pdf, PCA9508 pin diagram?
- Need any After-Sales service, please feel free contact us: sales@jotrin.com
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