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Texas Instruments TLC7733QP
- Part No.:
- TLC7733QP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC7733QP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,088
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Product details
Overview
TLC7733QP from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.93 V sense threshold, active-low RESET output, programmable delay via external capacitor, and operation over –40°C to 125°C. It provides power-on reset generation, undervoltage supervision, and power-down control for static RAM with battery backup in microprocessor systems.
For engineers reviewing the TLC7733QP datasheet, TLC7733QP pinout, TLC7733QP application, or TLC7733QP equivalent, this page delivers verified specifications, DRB-package terminal mapping, medical imaging and industrial control use cases, and two validated alternative supervisors with distinct threshold and temperature profiles.
Technical Context
The TLC7733QP implements a precision voltage sensor with temperature-compensated internal reference and hysteresis (70 mV) to prevent oscillation during threshold crossing. Its internal timer generates a user-defined delay (td = 2.1 × 10⁴ × CT) before deasserting RESET after SENSE voltage recovers above 2.93 V.
It supports dual-mode operation: when CONTROL is grounded, RESET becomes active-high; when CONTROL is high, standard active-low reset behavior applies. The device asserts RESET at VDD ≥1 V and maintains defined output states down to VDD = 1 V, enabling reliable power-fail detection in battery-backed memory circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold | 2.93 V (fixed, negative-going input threshold for undervoltage detection) |
| Supply Range | 2 V to 6 V (supports wide-input industrial and automotive rails) |
| Max Supply Current | 16 µA (enables multi-year battery operation in low-power systems) |
| Reset Delay | Programmable via external capacitor (td = 2.1 × 10⁴ × CT, e.g., 2.1 ms with 100 nF) |
| Operating Temp | –40°C to 125°C (Q-grade qualification for under-hood and industrial environments) |
| Output Type | Active-low totem-pole RESET with 2 mA sink capability (drives logic inputs directly) |
| Hysteresis | 70 mV (prevents chatter during slow-rising/falling supply transitions) |
Pinout & Package
Package: DRB (8-pin SON, 3 mm × 3 mm, 0.5 mm pitch, non-magnetic variant available for medical imaging).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Power source (2–6 V); RESET asserted when VDD drops below 1 V during power-down |
| GND | Ground reference | Return path for all currents; required for stable voltage reference and output logic levels |
| SENSE | Monitor input | Connects to regulated rail or point-of-load; triggers RESET when voltage falls below 2.93 V |
| CONTROL | Mode select input | Low = active-high RESET; high = active-low RESET (enables flexible system-level reset polarity) |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when RESIN < 0.2×VDD |
| RESET | Primary reset output | Active-low totem-pole output; sinks 2 mA minimum; drives microcontroller /CS or reset pins directly |
| NC | No connect | Pin 7 is internally unused; must be left floating or tied to GND per TI design guidelines |
| NC | No connect | Pin 8 is internally unused; must be left floating or tied to GND per TI design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET at VDD ≥1 V - ensures clean initialization before core logic powers up |
| Automatic reset on voltage drop | Detects SENSE falling below 2.93 V and holds RESET active until recovery + delay expires |
| Programmable delay time | External capacitor sets td from ~1 ms to >1 s - eliminates need for discrete timing components |
| Power-down control support | Enables automatic disabling of battery-backed SRAM during main supply failure (via CONTROL/RESET coordination) |
| Micropower operation | 16 µA max IDD enables integration into always-on subsystems without compromising battery life |
| Wide temperature range | –40°C to 125°C operation qualified per Q-grade - suitable for engine control, industrial PLCs, and medical equipment |
Applications
| Medical Imaging Systems | Industrial Motor Controllers |
|---|---|
|
Use Scenario: MRI and CT scanner subsystems requiring fail-safe power monitoring during high-noise, high-reliability operation. IC Role / Device Role / Timing Role: Voltage supervisor ensuring processor reset and SRAM retention during brief AC line sags or switching transients. Use Value: Non-magnetic DRB package prevents interference with magnetic field integrity; Q-grade temp range sustains operation near RF coils. |
Use Scenario: Programmable logic controllers managing servo drives in factory automation where brownouts cause position loss. IC Role / Device Role / Timing Role: Monitors 5 V logic rail and asserts RESET before MCU enters undefined state, while coordinating SRAM hold via CONTROL pin. Use Value: 70 mV hysteresis prevents false resets during PWM-induced supply ripple; 125°C rating survives enclosure heat buildup. |
| Automotive Body Control Modules | Energy Metering Hardware |
|
Use Scenario: BCM microcontrollers powered from switched 12 V supplies subject to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Supervises 3.3 V LDO output and triggers controlled shutdown/reset sequence before voltage collapse. Use Value: 2 V min supply operation allows function down to battery voltages as low as 6 V during cranking; 16 µA current minimizes parasitic drain. |
Use Scenario: Smart electricity meters with tamper-proof data logging that must retain calibration constants during grid interruptions. IC Role / Device Role / Timing Role: Detects main supply failure and activates battery-backed SRAM write-protection using CONTROL-driven chip-select gating. Use Value: Programmable delay ensures sufficient time for EEPROM save before backup power depletes; DRB footprint saves PCB area in compact meter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7733IP | Same 2.93 V threshold and functionality, but in PDIP-8 package with –40°C to 85°C rating | Limited to commercial-temperature environments; no extended thermal margin for under-hood or industrial enclosures | Select when cost-sensitive prototyping or legacy through-hole assembly is required, and ambient temperature stays below 85°C |
| TLC7705QP | 4.55 V fixed threshold, same Q-grade temp range and DRB-compatible PDIP-8 package | Designed for 5 V system supervision instead of 3.3 V rails; not interchangeable without circuit redesign | Choose when supervising higher-voltage domains (e.g., analog front-end supplies) while retaining Q-grade reliability and PDIP compatibility |
Compared with TLC7733QP, TLC7733IP trades thermal robustness for lower-cost through-hole assembly, while TLC7705QP shifts threshold to match 5 V logic domains - neither is pin-compatible, but both share identical control logic, delay programming, and reset timing architecture.
Availability
TLC7733QP is available at Aetrix Electronics and suitable for medical imaging systems, industrial motor controllers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC7733QP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The TLC77xx family was designed specifically for micropower voltage supervision in safety-critical and battery-sensitive applications including medical devices, automotive ECUs, and industrial control hardware.
FAQ
What is the exact sense threshold voltage of the TLC7733QP?
The TLC7733QP has a fixed negative-going input threshold voltage (VIT–) of 2.93 V, with typical tolerance ±70 mV (2.86 V to 3.00 V) across its full operating temperature range of –40°C to 125°C. This value is factory-trimmed and does not require external resistor networks, unlike the TLC7701.
Does the TLC7733QP support active-high reset output?
Yes, the TLC7733QP supports active-high reset output when the CONTROL pin is held low (≤0.2×VDD). In this mode, the RESET pin goes high during fault conditions. When CONTROL is high (≥0.7×VDD), RESET operates in standard active-low mode - providing flexibility for diverse system-level reset architectures.
What package type is used for the TLC7733QP?
The TLC7733QP uses an 8-pin PDIP (Plastic Dual Inline Package) with 0.3 inch body width and 0.1 inch lead pitch. It is distinct from the DRB (SON) package variants like TLC7733QPWR; the "QP" suffix explicitly denotes the PDIP-8 package with Q-grade temperature qualification (–40°C to 125°C).
How is the reset delay time set on the TLC7733QP?
The reset delay time (td) on the TLC7733QP is set by an external capacitor (CT) connected between the CT pin and ground. The relationship is td = 2.1 × 10⁴ × CT, yielding ~2.1 ms with a 100 nF capacitor. No external resistor is needed - only CT determines delay, simplifying BOM and layout.
Can the TLC7733QP be used for battery-backed SRAM power-down control?
Yes, the TLC7733QP includes dedicated logic for battery-backed SRAM control. By connecting the CONTROL pin to the microprocessor's memory bank select signal and driving SRAM /CS with RESET, the device automatically disables the memory during main supply failure - preserving data integrity while minimizing backup current draw.
TLC7733QP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC7733QP FAQ
1.How can I place an order for TLC7733QP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7733QP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLC7733QP reliable?
The price and inventory of TLC7733QP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7733QP is usually 5 days.
3.What payment methods are accepted for TLC7733QP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7733QP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7733QP?
TLC7733QP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7733QP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLC7733QP?
For technical support, including TLC7733QP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7733QP requirements.
6.How does Aetrix verify that TLC7733QP is sourced from the original manufacturer or authorized distributors?
All TLC7733QP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLC7733QP meets industry standards.
7.What is the process for return or replacement of TLC7733QP?
All TLC7733QP units undergo pre-shipment inspection (PSI). If there is an issue with TLC7733QP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLC7733QP part is unused and in its original packaging.
Return procedure for TLC7733QP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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