TLC7705QD Texas Instruments In Stock
TLC7705QD is a precision supply voltage supervisor and reset IC by Texas Instruments. Key specs: 4.55 V reset threshold, 200 ms minimum reset pulse width, and -40°C to 125°C operating range. From $0.80, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Price
- From $1.0400(MOQ 75)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TLC7705QD?
- Precision 4.55 V undervoltage threshold with tight ±2% accuracy ensures reliable microprocessor reset in 5 V logic systems
- Active-low open-drain RESET output with 200 ms minimum pulse width guarantees sufficient processor initialization time
- Wide operating temperature range of -40°C to 125°C qualifies the TLC7705QD for automotive and industrial environments
- Manual reset input pin allows external push-button or system-level reset triggering independent of supply voltage events
What is TLC7705QD used for?
The TLC7705QD is used to supervise the power supply of microcontrollers and DSPs in automotive ECUs, industrial PLCs, and embedded systems that require a guaranteed reset during brownout or power-up events. Its 4.55 V precision threshold and 200 ms pulse width ensure that 5 V microprocessors start from a clean state after supply fluctuations. The small SOIC-8 package and -40°C to 125°C temperature rating make it a standard choice for safety-critical reset circuits in harsh environments.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for TLC7705QD?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What reset threshold voltage does the TLC7705QD monitor, and how accurate is it?
The TLC7705QD monitors a 4.55 V undervoltage reset threshold with ±2% accuracy, ensuring reliable detection of supply droops in 5 V microprocessor systems. This precision eliminates the need for external resistor dividers and prevents spurious resets from occurring within the 4.55 V to 5.5 V normal operating window.
How long does the TLC7705QD hold the RESET output asserted after a power-up or brownout event?
The TLC7705QD asserts the active-low RESET output for a minimum of 200 ms after the supply voltage rises above the 4.55 V threshold, giving the microcontroller sufficient time to complete its internal initialization sequence. This 200 ms reset pulse width is programmable with an external capacitor to extend the timeout up to several seconds for slower processors.
Is the TLC7705QD rated for automotive temperature conditions?
Yes, the TLC7705QD is rated for operation across -40°C to 125°C, satisfying the temperature requirements of AEC-Q100 Grade 1 automotive applications. This range covers engine bay ECUs, transmission controllers, and ADAS sensors that experience extreme thermal cycling over the vehicle lifetime while demanding a stable 4.55 V reset supervision function.
How does the TLC7705QD compare to a simple RC reset network for protecting a microcontroller?
Unlike a passive RC reset network, the TLC7705QD provides a precision 4.55 V threshold with ±2% tolerance, active RESET output, and a guaranteed 200 ms pulse width that is independent of supply ramp rate or load current variations. This deterministic behavior prevents false starts in 5 V microprocessor systems across the full -40°C to 125°C operating range, which passive RC circuits cannot reliably achieve.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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