PCA9517DR - 2-Channel 400kHz I2C Level Translator | Texas Instruments (Tape & Reel)
MPN: PCA9517DR ✓ فعالPCA9517DR جائزہ
What is a level-translating I2C buffer/repeater? It is an interface IC that connects two bidirectional serial buses operating at different voltage levels. The PCA9517DR belongs to the I2C repeater and voltage-level-translator hierarchy, within interface ICs and semiconductors. Its two channels isolate bus voltage domains while preserving bidirectional data transfer, helping systems separate voltage levels without redesigning the upstream and downstream devices.
Key verified features include two bidirectional channels, 400kHz operation, and compatibility with I2C and SMBus applications. The device can translate signals between low-voltage domains, including voltages down to 0.9V in the NXP-described PCA9517 function, and higher-voltage domains from 2.7V to 5.5V. The 8-SOIC package supports conventional surface-mount assembly and is identified by Texas Instruments as a two-channel signal buffer/repeater.
The PCA9517DR is useful when two I2C domains require different voltage ranges or when a bus segment needs buffering. Its two independent enables allow unused channels to be disabled, while the bidirectional architecture supports data flow in either direction. The verified distributor listing specifies 400kHz operation and an 8-SOIC package; detailed electrical limits should be confirmed against the manufacturer datasheet before production release.
Typical applications include voltage-level translation between low-voltage sensors and higher-voltage controllers, SMBus isolation between subsystems, interface conditioning between PCB domains, and embedded systems where I2C devices use different supply rails. Because it is a repeater rather than a regulator, system designers must verify pull-up voltage, bus capacitance, propagation delay, and enable sequencing on each side.
A key design consideration is that both sides of each channel must be properly referenced and pulled up for the voltage domains being supported. Do not assume that level translation removes the need for correct pull-up placement or timing review. Confirm the exact pinout, enable polarity, maximum loading, and operating limits from the official Texas Instruments documentation.
This page combines verified distributor information, manufacturer product identity, interface-function context, package information, and practical selection guidance to support engineers searching for a PCA9517DR replacement, equivalent, pinout, price, or I2C level-translation solution.
کے لیے ڈراپ اِن متبادل PCA9517DR — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PCA9517DR (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Number of Channels, Package.
PCA9517D,118
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PCA9517ADMR2G
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PCA9517DR تفصیلات
| Product Type | 2-channel bidirectional I2C/SMBus buffer/repeater |
| Number of Channels | 2 |
| Maximum I2C Bus Frequency | 400 kHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Low-Voltage Domain Support | Down to 0.9 V |
| Higher-Voltage Domain Support | 2.7 V to 5.5 V |
| Bus Compatibility | I2C and SMBus |
| Directional Architecture | Bidirectional |
| پیکیج | 8-SOIC |
| ماؤنٹنگ ٹائپ | Surface Mount |
| سپلائی کرنٹ | 5 mA |
| Delay Time | 170 ns |
| اِن پٹ کیپیسیٹنس | 6 pF |
| Enable Control | Two-side enable control |
| Logic Level Translation | Voltage-level translation between bus domains |
| Interface Classification | Signal buffer and repeater |
| Manufacturer | Texas Instruments |
PCA9517DR 8-soic پن کنفیگریشن گائیڈ
PCA9517DR (8-soic پیکیج) کے لیے پن کنفیگریشن۔ پن نمبرنگ، فنکشنز اور کنکشن ڈایاگرامز مینوفیکچرر کے ڈیٹا شیٹ میں بیان کیے گئے ہیں۔ درست فٹ پرنٹ اور سولڈرنگ رہنما ہدایات کے لیے اسی سے رجوع کریں۔
کے لیے تفصیلی پن آؤٹ ڈیٹا دستیاب نہیں PCA9517DR.
رجوع کریں ڈیٹا شیٹ مکمل پن کنفیگریشن کے لیے۔
عام استعمالات
PCA9517DR کے لیے موزوں ہے 6 ایپلیکیشنs: Low-Voltage Sensor I2C Interface, SMBus Voltage-Domain Translation, Embedded Controller Bus Conditioning, Multi-Rail Sensor Network, PCB Bus-Segment Buffering, Level Translation Between 1.8V and 5V Domains.
Low-Voltage Sensor I2C Interface
The PCA9517DR fits when a 1.8V or other low-voltage sensor must communicate with a controller operating from a different supply domain. Its bidirectional two-channel architecture can translate both clock and data paths while preserving I2C behavior up to 400kHz. Place the appropriate pull-up resistors on each voltage domain and verify enable polarity, bus capacitance, and timing against the official datasheet. The trade-off is that the level translator adds propagation delay, so margin should be checked at the highest intended I2C rate.
تجویز کردہ
SMBus Voltage-Domain Translation
PCA9517DR is suitable for separating SMBus devices operating at different supply voltages while retaining the bidirectional clock and data behavior described by Texas Instruments. Its verified 400kHz capability is appropriate for many low-speed management buses, but the design must confirm the exact voltage combination and timing margins. Keep pull-ups on the side they belong to, maintain the bus return path, and avoid using the repeater as a substitute for a power regulator or isolation barrier.
تجویز کردہ
Embedded Controller Bus Conditioning
In an embedded controller design, the PCA9517DR can place a buffered, level-translated I2C segment between a microcontroller and another subsystem. The two enable inputs provide control opportunities for isolating unused channels, while the bidirectional channels support normal I2C clock and data flow. The 8-SOIC package is straightforward to route on a conventional PCB, although designers should still check ground continuity and pull-up placement. At 400kHz, capacitance and propagation-delay accumulation become more important than at lower bus rates.
تجویز کردہ
Multi-Rail Sensor Network
The PCA9517DR can help connect I2C sensors on a low-voltage rail to a host on a higher-voltage rail, especially when the sensors and host cannot share the same reference. Its two-channel structure allows separate level domains to be buffered on one side and translated toward the other. Because this is a non-isolated interface IC, it does not provide galvanic isolation; common ground and voltage-domain planning remain mandatory. Verify enable states during reset and test each bus segment independently to prevent contention.
تجویز کردہ
PCB Bus-Segment Buffering
When long traces or segmented interconnects increase bus capacitance, the PCA9517DR can be considered as a repeatable buffering point between I2C domains. The verified 400kHz rating provides a defined operating point, while the level-translation function allows the two sides to use different supply rails. Buffering does not eliminate the need for correct pull-up resistor sizing or topology review, and the device should not be assumed to correct excessive rise-time violations. Validate the complete bus with the worst-case cable, device loading, and pull-up network.
تجویز کردہ
Level Translation Between 1.8V and 5V Domains
The PCA9517DR is a practical candidate for translating a 1.8V I2C segment toward a 5V domain when the system’s electrical limits and pull-up arrangement are confirmed from the manufacturer data. The supplied NXP documentation for the PCA9517 family describes low-voltage operation down to 0.9V and higher-voltage domains from 2.7V to 5.5V, which provides useful context but is not a substitute for the Texas Instruments PCA9517DR datasheet. Check output levels, input thresholds, bus rise time, and reset behavior before release to production.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PCA9517DR — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PCA9517DR,118 | PCA9517AD | PCA9517DRGKR |
|---|---|---|---|---|
| Brand | Texas Instruments | NXP Semiconductors | NXP Semiconductors | Texas Instruments |
| Package | 8-SOIC | 8-SO - related listing; package equivalence requires verification | 8-SO - comparison result | MSOP-8 - not same package |
| Function | 2-channel bidirectional I2C/SMBus buffer/repeater | I2C bus repeater | I2C repeater | Voltage-level translator/repeater |
| Interface | I2C/SMBus | I2C bus repeater | I2C repeater | Translator/repeater |
| Price | Numeric price not supplied | Numeric price not supplied | Numeric price not supplied | Numeric price not supplied |
اہم امتیازی خصوصیات
- Two bidirectional channels in one device (بمقابلہPCA9517AD)
- 400kHz verified operating point (بمقابلہPCA9517DR,118)
- Verified 8-SOIC package identification (بمقابلہPCA9517DRGKR)
ڈیزائن نوٹس
Place the PCA9517DR close to the separation point between the two I2C voltage domains. Keep each side’s pull-up network local to its own bus segment, connect both domain grounds to the common reference, and avoid routing the level-shifted side through long unprotected traces. The verified package is 8-SOIC, so follow the manufacturer land pattern rather than substituting a generic footprint.
Treat the verified 400kHz rating as a system limit to validate, not a guarantee for every bus. Check pull-up resistance against bus capacitance, rise and fall time, propagation delay, and the combined loading of attached devices. If cable length or capacitance is substantial, measure the far-end waveform and preserve margin below the device’s specified operating frequency.
Do not assume that the PCA9517DR replaces pull-up resistors, provides galvanic isolation, or solves a missing ground connection. Confirm enable polarity and startup state, verify that unused channels are handled according to the official datasheet, and distinguish the Texas Instruments PCA9517DR from similarly named NXP PCA9517DR,118 and PCA9517AD listings before approving a substitution.
تعمیل کی معلومات
The supplied verified data does not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status. Compliance fields remain unknown rather than inferred.
