PCA9536D - 4-Bit I2C GPIO Expander | Texas Instruments
MPN: PCA9536D ✓ نشطPCA9536D نظرة عامة
An I2C GPIO expander is a semiconductor interface device that extends the number of digital input and output lines available from a host controller. PCA9536-family parts belong to the I/O expander hierarchy, connect through a two-wire I2C or SMBus-compatible interface, and are used for control, sensing, indicators, relays, and low-speed peripheral signaling.
The verified product information identifies the PCA9536 as a 4-bit I2C/SMBus I/O expander with a 400 kHz interface. Its 2.3 V to 5.5 V supply range supports both low-voltage embedded systems and conventional 5 V logic environments. The remote four GPIO lines reduce MCU pin count, particularly in compact designs where package area, connector routing, or exposed-pin limitations matter.
The PCA9536D uses configuration registers to define port direction and output behavior. Its I2C address is selected by hardware pins according to the manufacturer's datasheet, allowing multiple expanders to coexist on one bus. Bus pull-up resistors, address decoding, and appropriate decoupling should be verified in the final schematic and layout.
Typical uses include reading discrete switches, driving LEDs, monitoring external signals, and adding control lines to embedded products. The device is suited to industrial control, consumer electronics, portable equipment, and compact controller boards where a serial bus is already present and four deterministic GPIO lines are needed.
Designers should confirm pin orientation, address selection, pull-up placement, and reset or power-up requirements against the manufacturer documentation. Because the verified data does not provide current pricing, detailed electrical limits, pin names, or package drawings, those values are marked for verification rather than inferred.
بدائل مباشرة لـ PCA9536D — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PCA9536D (نفس عامل الشكل والبصمة).
PCA9536DRG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PCA9536D,118
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PCA9536DGKRG4
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PCA9536D,112
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
PCA9536DR
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←PCA9536D المواصفات
| Product Type | 4-bit I2C/SMBus GPIO expander |
| Number of GPIO Lines | 4 |
| Supply Voltage Range | 2.3 V to 5.5 V |
| I2C Bus Frequency | 400 kHz |
| الواجهة | I2C/SMBus |
| Configuration Registers | Present |
| CMOS Device Type | 8-pin CMOS device |
| Input/Output Capability | General-purpose parallel input/output |
| العلبة | 8-SOIC |
| NXP Package | 8-SO |
| Manufacturer | Texas Instruments |
دليل تكوين أطراف PCA9536D 8-so
تكوين الأطراف لـ PCA9536D (حزمة 8-so). يتم تعريف ترقيم الأطراف والوظائف ومخططات التوصيل في ورقة البيانات الفنية من الشركة المصنعة. راجعها للحصول على البصمة الدقيقة وإرشادات اللحام.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ PCA9536D.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
PCA9536D مناسب لـ 7 التطبيقs: Embedded Control GPIO Expansion, Industrial Control and Monitoring, LED and Indicator Control, Switch and Discrete Signal Input, Consumer Electronics and Appliance Control, Instrumentation and Test Equipment, Compact IoT and Sensor Interface Boards.
Embedded Control GPIO Expansion
The PCA9536D fits compact embedded controllers that have reached their direct GPIO-pin limit but already communicate through I2C or SMBus. Its four parallel lines can be assigned for discrete control outputs or digital status inputs, reducing host pin pressure without adding a high-speed parallel bus. The verified 2.3 V to 5.5 V supply range supports both lower-voltage embedded rails and 5 V logic systems, while the listed 400 kHz interface is appropriate for ordinary control traffic rather than time-critical streaming.
موصى به
Industrial Control and Monitoring
In industrial equipment, a four-bit expander can add status indicators, mode controls, alarm signals, or sensor-enable lines without consuming several MCU pins. The PCA9536D's I2C/SMBus interface allows a controller to update several lines through the serial bus, and its 2.3 V to 5.5 V operating range accommodates common control-rail combinations. For a factory design, verify the exact logic thresholds, isolation requirements, surge exposure, and long wiring behavior because those parameters are not supplied in the verified data.
موصى به
LED and Indicator Control
The PCA9536D can provide a small, deterministic bank of LED or indicator-control outputs when the LED currents and voltage levels are within the device's verified operating requirements. Four lines are useful for status groups, mode indicators, or panel controls where the host already uses I2C. The designer must add the correct current-limiting network and verify output drive capability from the manufacturer datasheet; the supplied data confirms four GPIO lines but does not provide output-current limits.
موصى به
Switch and Discrete Signal Input
A four-bit I/O expander is useful when a product needs extra switch, interlock, door, or mode inputs. The PCA9536D can read discrete signals over I2C, allowing the host firmware to debounce and interpret them centrally. The supplied data confirms a 4-bit I/O expander with I2C/SMBus communication, but it does not include input thresholds, hysteresis, leakage, or debounce timing; these must be established from the exact datasheet and the external signal network.
موصى به
Consumer Electronics and Appliance Control
Consumer products often need several front-panel, mode, or indicator lines while prioritizing low host-pin count. The PCA9536D provides four lines through a compact 8-SOIC package, making it suitable for appliance controls, small consumer modules, and board-level interface expansion. Its 2.3 V to 5.5 V range can simplify compatibility between a low-voltage host and 5 V peripherals, but the actual mixed-voltage arrangement must be checked against input and output thresholds.
موصى به
Instrumentation and Test Equipment
Instrumentation systems can use the PCA9536D to add front-panel controls, status outputs, or discrete measurement-support signals when the controller communicates over I2C. The four-line capacity is intentionally small, so it is most useful when the design needs a targeted set of signals rather than a full parallel interface. The listed 400 kHz bus rate should be checked against cable length, bus capacitance, pull-up resistance, and the number of connected peripherals before relying on it for external control lines.
موصى به
Compact IoT and Sensor Interface Boards
The PCA9536D can supplement a small IoT controller with four low-speed GPIO lines for sensors, latches, status LEDs, or peripheral enables. Using I2C rather than direct MCU pins preserves board area and keeps the wiring organized, while the 2.3 V to 5.5 V range supports common low-power rails. In battery-powered products, account for the device's actual quiescent current and leakage from the exact datasheet, since those values are not present in the verified search data.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PCA9536D — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PCA9536DRG4 | PCA9536D,118 | PCA9536DGKRG4 | PCA9536D,112 | PCA9536DR |
|---|---|---|---|---|---|---|
| Product Type | 4-bit I2C/SMBus GPIO expander | PCA9536-family GPIO expander | 4-bit I2C/SMBus I/O expander | PCA9536-family GPIO expander | PCA9536D-family 4-bit expander | PCA9536-family GPIO expander |
| Brand | Texas Instruments | Texas Instruments | NXP Semiconductors | Texas Instruments | NXP Semiconductors | Texas Instruments |
| Package | 8-SOIC | 8-SOIC | 8-SO | 8-SOIC package family; verify exact suffix | 8-SO | 8-SOIC |
| Number of GPIO Lines | 4 | 4-bit family | 4-bit | 4-bit family | 4-bit family | 4-bit family |
| Supply Voltage Range | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V family specification; verify suffix | 2.3 V to 5.5 V family specification; verify suffix | 2.3 V to 5.5 V family specification |
| Bus Interface | I2C/SMBus | I2C/SMBus family interface | I2C/SMBus | I2C/SMBus family interface | I2C/SMBus family interface | I2C/SMBus family interface |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount; verify exact suffix | Surface mount | Surface mount |
أبرز الفروقات
- Four-line GPIO expansion in an 8-SOIC package (مقابلPCA9536D,118)
- Supplier and lifecycle distinction (مقابلPCA9536D,118)
- Direct replacement candidates in supplied cross-reference data (مقابلPCA9536DRG4)
ملاحظات التصميم
Place the PCA9536D close to the I2C controller and the devices it controls, then route SCL and SDA as a short, controlled bus pair. Keep pull-up resistors near the bus master or according to the system-level bus strategy. The verified data does not specify pin numbers or exact electrical limits, so confirm the footprint and pin functions against the selected manufacturer's datasheet before release.
Check the pull-up network against the bus voltage, total bus capacitance, sink-current capability, and required rise time. A listed 400 kHz interface does not guarantee clean operation on a long or heavily loaded wiring harness. Use the slowest supported rate and verify timing margins in hardware, especially when the expander is connected through connectors or cables.
Do not treat PCA9536D, PCA9536D,118, PCA9536DR, and similar orderable variants as automatically identical without checking manufacturer, package, pinout, and lifecycle status. The supplied results show both Texas Instruments and NXP offerings, while the NXP page is marked end of life. Record the exact approved MPN and verify procurement source before committing a production BOM.
معلومات الامتثال
The supplied verified data does not provide explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status for the exact selected PCA9536D orderable part. AEC-Q100 is marked not_applicable because the supplied material does not identify an automotive-qualified variant; this is not an automotive qualification claim.
