TCA9534DWT - 8-Bit I2C I/O Expander | Texas Instruments
MPN: TCA9534DWT ✓ सक्रियTCA9534DWT अवलोकन
An I2C I/O expander is an interface IC that increases the number of digital input and output lines available to a host processor. The TCA9534DWT uses a two-wire bidirectional I2C or SMBus connection for register access, while the eight external pins can be configured individually as inputs or outputs. This makes it useful for reducing microcontroller pin count in control, sensing, and actuator systems.
The TCA9534DWT provides separate input and output configuration registers, allowing each of the eight ports to be used as an input or output. It also includes an interrupt output for change detection on configured input ports. The 1.65 V to 5.5 V operating range supports low-voltage digital systems, while 100 kHz and 400 kHz bus operation accommodates both standard and faster embedded communication requirements.
The 16-pin SOIC package provides a compact surface-mount footprint for industrial, consumer, communications, and embedded-control equipment. The device is designed for systems that need more general-purpose digital I/O without adding a larger processor or complex programmable logic. The manufacturer product page identifies the TCA9534 family as an I2C/SMBus interface IC with interrupt and configuration registers.
Typical applications include relay and solenoid control, LED status and indicator interfaces, keypad or button scanning, sensor input collection, and expansion of a microcontroller's available digital lines. The TCA9534DWT is particularly appropriate when a bus-connected peripheral can reduce wiring complexity and preserve host-controller pins for communications, timing, or analog functions.
When designing around the TCA9534DWT, confirm the address configuration and electrical limits against the manufacturer datasheet before layout. Use appropriate pull-up resistors on the I2C bus and account for the operating voltage of both the expander and connected peripherals. This page combines the manufacturer product information, distributor references, package details, application guidance, and drop-in comparison information for engineering review.
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TCA9534DWR
✅ ड्रॉप-इनकीमत के लिए संपर्क करें
डेटाशीट देखें →TCA9534DWT विशेषताएं
| Product Type | 8-bit I2C/SMBus I/O expander |
| Number of I/O Ports | 8 bits |
| Supply Voltage Range | 1.65 V to 5.5 V |
| Minimum Operating Voltage | 1.65 V |
| Maximum Operating Voltage | 5.5 V |
| I2C Standard-mode Frequency | 100 kHz |
| I2C Fast-mode Frequency | 400 kHz |
| Protocol Support | I2C and SMBus |
| Register Features | Interrupt and configuration registers |
| पिन की संख्या | 16 pins |
| पैकेज | 16-pin SOIC |
| माउंटिंग प्रकार | Surface mount |
| I/O Configuration | Individually configurable input/output ports |
| Interrupt Output | Yes |
| Address Configuration | A0, A1, and A2 address inputs |
TCA9534DWT पिन कॉन्फ़िगरेशन
| पिन 1 | INT — Interrupt output |
| पिन 2 | A0 — Address input A0 |
| पिन 3 | A1 — Address input A1 |
| पिन 4 | A2 — Address input A2 |
| पिन 5 | P0 — General-purpose I/O port 0 |
| पिन 6 | P1 — General-purpose I/O port 1 |
| पिन 7 | P2 — General-purpose I/O port 2 |
| पिन 8 | P3 — General-purpose I/O port 3 |
| पिन 9 | VSS — Ground reference |
| पिन 10 | P4 — General-purpose I/O port 4 |
| पिन 11 | P5 — General-purpose I/O port 5 |
| पिन 12 | P6 — General-purpose I/O port 6 |
| पिन 13 | P7 — General-purpose I/O port 7 |
| पिन 14 | SCL — I2C serial clock |
| पिन 15 | SDA — I2C serial data |
| पिन 16 | VCC — Power supply |
सामान्य अनुप्रयोग
TCA9534DWT के लिए उपयुक्त है 6 अनुप्रयोगs: Microcontroller Digital I/O Expansion, Relay and Solenoid Control, LED Status and Indicator Interface, Digital Sensor and Keypad Interface, Industrial Control Interface Expansion, Communications and Network Equipment Control.
Microcontroller Digital I/O Expansion
The TCA9534DWT is useful when a host controller needs additional digital lines for buttons, status indicators, or control signals without consuming its native pins. Its eight general-purpose ports are individually configurable through the I2C interface, while the 1.65 V to 5.5 V operating range accommodates common low-voltage systems. The device also supports 100 kHz Standard-mode and 400 kHz Fast-mode operation, allowing it to fit established embedded communication architectures. Keep the I2C routing compact and verify the port voltage limits against the connected logic family.
अनुशंसित
Relay and Solenoid Control
The TCA9534DWT can provide a compact bus-controlled interface for relays, solenoids, or other discrete loads that would otherwise consume several host-controller pins. Its eight outputs reduce wiring complexity while configuration registers allow each port direction to be managed independently. The interrupt output is useful for returning input status from the same board, although external driver circuitry remains necessary when a load exceeds the port's electrical capability. Confirm logic voltage, current, isolation, and inductive-load requirements before connecting it to power stages.
अनुशंसित
LED Status and Indicator Interface
The TCA9534DWT is well suited to centralized LED status indication because eight independently configurable ports can drive or sense multiple indicators through the host bus. Operating from 1.65 V to 5.5 V allows the device to share a low-voltage control domain with many embedded systems. Fast-mode operation up to 400 kHz supports responsive updates when indicators represent changing equipment status. Use suitable series-current limiting and account for simultaneous output loading so the selected indicator arrangement remains within the port specifications.
अनुशंसित
Digital Sensor and Keypad Interface
The TCA9534DWT can expand digital sensor inputs, switch states, or keypad contacts into a compact I2C-connected module. Configurable input ports and the interrupt output support event-driven polling behavior, helping a host avoid repeatedly reading the bus when no state has changed. The device's 8-bit width fits many binary control boards, and its 1.65 V to 5.5 V range supports low-voltage sensor systems. Use the datasheet to verify input thresholds, address setup, pull-up requirements, and the electrical characteristics of attached sensors.
अनुशंसित
Industrial Control Interface Expansion
The TCA9534DWT can extend a controller in industrial or instrumentation equipment that requires additional discrete control and status lines while retaining a compact serial interface. The I2C/SMBus connection reduces pin count and wiring compared with a parallel expansion port, while the interrupt line supports responsive detection of external state changes. Its 16-pin SOIC package is compatible with conventional surface-mount assembly and board-space constraints. Designers should still verify system voltage tolerance, isolation requirements, environmental limits, and the complete power budget before using it as an interface element.
अनुशंसित
Communications and Network Equipment Control
The TCA9534DWT is appropriate for communications equipment that needs discrete control, monitoring, or fault signaling in addition to its main communication interfaces. Eight configurable ports can handle status LEDs, module enables, or digital fault inputs, while the interrupt output provides an efficient change-notification path. Supporting both 100 kHz and 400 kHz I2C operation lets it operate with widely used embedded bus rates. Place the expander near the controlled circuitry, maintain short SCL and SDA routes, and confirm that bus pull-ups remain appropriate for the final loaded bus.
अनुशंसित
अनुशंसित उत्पादों का सारांश
के लिए इंजीनियरिंग संदर्भ डेटा TCA9534DWT — तुलना, डिज़ाइन मार्गदर्शन और अनुपालन जानकारी।
चयन गाइड
विकल्पों के साथ तुलना
| पैरामीटर | यह उत्पाद | TCA9534DWR |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Package | SOIC-16 | SOIC-16 |
| I/O Port Count | 8 bits | 8 bits |
| I2C Standard-mode | 100 kHz | 100 kHz |
| I2C Fast-mode | 400 kHz | 400 kHz |
| Protocol | I2C and SMBus | I2C and SMBus |
| Interrupt Output | Yes | Yes |
| Configuration Registers | Yes | Yes |
| Ordering Suffix | TCA9534DWT | TCA9534DWR |
मुख्य विशेषताएँ
- Eight configurable general-purpose ports in a compact interface IC (बनामTCA9534DWR)
- Supports both Standard-mode and Fast-mode I2C operation (बनामTCA9534DWR)
- Integrated interrupt and configuration registers (बनामTCA9534DWR)
डिज़ाइन नोट्स
Place the TCA9534DWT close to the connected input and output circuitry, and route SCL and SDA as short, continuous traces between the host controller and expander. Keep the address-input straps away from noisy switching nodes. The manufacturer datasheet should be used for decoupling requirements and the final pin assignment.
Do not assume that all eight ports can be used as outputs without checking the load current and voltage limits. Configure a port as an input before using it with an external signal source, and confirm the address pins are set to the intended I2C address. A wrong direction setting or address strap can make an otherwise functional board appear unresponsive.
Select I2C pull-up resistors for the actual bus voltage, capacitance, cable length, and operating speed. Keep pull-ups electrically close to the bus nodes and avoid long stub branches from SCL or SDA. When several expanders share the bus, review the combined pull-up resistance and the loading from every connected device before finalizing the schematic.
अनुपालन जानकारी
Compliance status was not explicitly stated in the referenced manufacturer and distributor information.