TCA9537DGSR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TCA9537DGSR is a 4-bit I2C-bus and SMBus I/O expander with interrupt output, featuring 400 kHz fast-mode I2C, configurable I/O direction per pin, and active-low interrupt. Designed for low-voltage 1.65 V to 5.5 V systems in VSSOP-10 package targeting embedded control and industrial automation.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- TCA9537DGSR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7852(MOQ 250)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4-bit I/O expander with I2C and SMBus interface up to 400 kHz
- Active-low interrupt output for event-driven MCU wake-up
- Individual I/O pin direction control via configuration register
- Wide supply voltage range: 1.65 V to 5.5 V
- Ultra-compact VSSOP-10 package for space-constrained designs
- Low standby current for battery-powered applications
Applications
TCA9537DGSR is widely used in embedded systems to expand GPIO pins for controlling LEDs, buttons, and sensors over a 2-wire I2C bus. It suits industrial automation controllers, handheld consumer devices, and IoT edge nodes where additional I/O is needed without consuming extra MCU pins. The interrupt feature makes it ideal for low-power applications requiring event-driven processing.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Interface IC Type | INTERFACE CIRCUIT |
| JESD-30 Code | S-PDSO-G10 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.65V |
| Supply Voltage-Nom | 1.8V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many I/O pins does TCA9537DGSR provide and what interface does it use?
TCA9537DGSR provides 4 bidirectional I/O pins controlled via the I2C and SMBus interface operating at up to 400 kHz fast mode. Each pin can be independently configured as input or output through the device's configuration register, making it flexible for various GPIO expansion scenarios.
Which supply voltage range is supported by TCA9537DGSR for mixed-voltage system designs?
TCA9537DGSR supports a wide supply voltage range of 1.65 V to 5.5 V, enabling direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic systems. This flexibility eliminates the need for level translators in many mixed-voltage board designs, saving cost and board area.
When should I choose TCA9537DGSR over adding GPIO directly on the microcontroller?
TCA9537DGSR is the right choice when a microcontroller's available GPIO count is exhausted but the I2C bus has free bandwidth. It offloads up to 4 pins onto 2 I2C lines, and its active-low interrupt line notifies the host CPU only when a pin changes state, reducing polling overhead and saving MCU power.
Does TCA9537DGSR include interrupt functionality, and how does it integrate with low-power MCU designs?
Yes, TCA9537DGSR features a dedicated active-low interrupt output that asserts whenever an input pin changes state. This allows a host MCU to remain in a low-power sleep mode and wake on demand rather than continuously polling the 4-bit I/O register, which is critical for battery-operated and energy-sensitive embedded applications.
What package does TCA9537DGSR use and how does its footprint benefit PCB layout?
TCA9537DGSR is housed in a VSSOP-10 small-outline package with a compact footprint suitable for density-constrained PCBs. The 10-pin configuration keeps routing simple when expanding GPIO by 4 pins, and its reflow peak temperature of 260°C is compatible with standard lead-free SMT assembly processes.
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About Texas Instruments
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 250+ | $0.9057 | $226.43 |
| 500+ | $0.8711 | $435.54 |
| 1000+ | $0.8645 | $864.45 |
| 2500+ | $0.8090 | $2022.50 |
| 5000+ | $0.7910 | $3955.00 |
| 7500+ | $0.7852 | $5889.07 |
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