LTC1694-1IS5#PBF Linear Technology Integrated Circuit (SOT23 (5-Pin)) In Stock
Linear Technology LTC1694-1IS5#PBF is an I2C/SMBus bus accelerator IC in a 5-pin SOT-23 package that drives capacitive bus loads to achieve Fast Mode 400 kHz and up to 1 MHz I2C communication rates. It operates from a 2.85 V to 5.5 V supply and extends usable bus length beyond the standard 400 pF capacitive limit. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Linear Technology
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- OBSOLETE
- Datasheet
- LTC1694-1IS5#PBF Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Accelerates I2C/SMBus rise times to support Fast Mode 400 kHz and up to 1 MHz operation on high-capacitance bus loads
- Wide supply range of 2.85 V to 5.5 V enables use in both 3.3 V and 5 V mixed-logic system environments
- Compact 5-pin SOT-23 package minimizes PCB footprint while providing independent acceleration for both SDA and SCL lines
Applications
The LTC1694-1IS5#PBF is designed for I2C and SMBus systems requiring Fast Mode 400 kHz or 1 MHz data rates on buses loaded with capacitive traces or multiple slave devices. It is commonly deployed in server management cards, industrial sensor networks, and battery management systems where I2C bus lengths or device counts push past the standard 400 pF capacitive limit. The 5-pin SOT-23 form factor allows easy integration into existing layouts with minimal board space overhead.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1635 |
| YTEOL | 0 |
| Analog IC - Other Type | ANALOG CIRCUIT |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What I2C speeds and supply voltage range does the LTC1694-1IS5#PBF support?
The LTC1694-1IS5#PBF accelerates I2C/SMBus communication to Fast Mode at 400 kHz and high-speed modes up to 1 MHz by actively driving the capacitive bus through a controlled current pull-up. It operates from a supply voltage of 2.85 V to 5.5 V, ensuring compatibility with 3.3 V and 5 V logic systems common in embedded computing and server management designs.
What capacitive bus load limitation does LTC1694-1IS5#PBF overcome in I2C system designs?
Standard I2C specifications limit bus capacitance to 400 pF, but the LTC1694-1IS5#PBF actively sources current onto the bus during rise transitions, allowing the designer to extend bus capacitance well beyond 400 pF while maintaining 400 kHz Fast Mode timing compliance. This is critical in systems with long PCB traces, multiple slave devices, or connectors adding significant parasitic capacitance.
How does placing the LTC1694-1IS5#PBF near the bus master benefit an I2C network with 10 or more slave nodes?
Placing the LTC1694-1IS5#PBF close to the bus master reduces the effective rise time seen at each slave node, allowing the master to address 10 or more slave devices at 400 kHz even when the total bus capacitance exceeds 400 pF. The 5-pin SOT-23 package adds fewer than 5 pF of parasitic capacitance to the bus, keeping the overhead minimal in dense multi-node I2C topologies.
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