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Texas Instruments TLC7733IPWR
- Part No.:
- TLC7733IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7733IPWR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,261
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Product details
Overview
TLC7733IPWR from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.93 V threshold, active-low RESET output, programmable delay via external capacitor, 2–6 V supply range, and 16 µA max quiescent current-used for reliable power-on and undervoltage reset in microcontroller systems.
For engineers reviewing the TLC7733IPWR datasheet, TLC7733IPWR pinout, TLC7733IPWR application, or TLC7733IPWR equivalent, this page delivers verified specifications, DRB-package terminal mapping, medical imaging and industrial control use cases, and two validated alternative supervisors with documented functional and timing differences.
Technical Context
The TLC7733IPWR integrates a precision temperature-compensated voltage reference, internal power-on reset generator, and hysteresis-enabled SENSE comparator to assert RESET when VSENSE drops below 2.93 V (±70 mV hysteresis). It supports battery-backed static RAM power-down control via CONTROL input.
Delay time (td) is externally set by capacitor CT: td = 2.1 × 104 × CT (CT in farads, td in seconds), enabling configurable reset hold durations from ~1.1 ms to >4 ms. RESET remains asserted until both threshold recovery and delay expiration occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.93 V (typical), ±70 mV hysteresis - ensures stable trip point across temperature and supply variation |
| Supply Range | 2 V to 6 V - supports single-cell Li-ion, 3.3 V, and 5 V logic rails without external regulation |
| Quiescent Current | 16 µA max - enables multi-year battery operation in low-power sensor nodes and portable medical devices |
| Reset Delay | Programmable via external capacitor (e.g., 100 nF → ~2.1 ms) - eliminates need for discrete RC networks |
| Operating Temp | –40°C to 85°C - qualified for industrial and commercial embedded applications |
| Output Drive | 10 mA sink / –2 mA source - directly drives microcontroller RESET pins and small logic loads |
| Power-Up Reset | Asserts RESET at VDD ≥ 1 V - guarantees early initialization before core logic becomes active |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 3.0 mm body, 0.65 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuits and output drivers; must be low-impedance connection |
| VDD | Positive supply | Primary power input (2–6 V); powers internal reference, comparator, and output stage |
| SENSE | Voltage monitor input | Connects to monitored rail (e.g., 3.3 V domain); triggers reset when voltage falls below 2.93 V |
| CONTROL | RAM power-down enable | When grounded, configures RESET as active-high for battery-backed SRAM chip-select control |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when driven <0.2×VDD |
| RESET | Active-low reset output | Open-drain compatible; sinks up to 10 mA; requires external pull-up for microcontroller interface |
| RESET | Active-high reset output | Complementary to RESET; provides inverted signal for dual-reset logic or monitoring |
| NC | No connect | Unbonded pin; must remain unconnected per TI design |
Key Features
| Feature | Design Value |
|---|---|
| Programmable reset delay | Capacitor-timed (100 nF → 2.1 ms) - replaces fixed-delay ICs and reduces BOM count |
| Defined RESET at VDD ≥1 V | Guarantees reset assertion during brown-in - prevents metastability in early power ramp |
| Temperature-compensated reference | Stable 2.93 V threshold over –40°C to 85°C - eliminates calibration in field-deployed equipment |
| Power-down control support | CONTROL pin enables automatic SRAM disable during main supply loss - preserves data integrity |
| Micropower operation | 16 µA max IDD - extends battery life in portable diagnostics and wearable health monitors |
Applications
| Medical Imaging Power Sequencing | Industrial PLC I/O Module Reset |
|---|---|
Use Scenario: MRI and ultrasound subsystems require precise, low-jitter power sequencing across multiple voltage domains (1.2 V, 3.3 V, 5 V) during cold start. IC Role / Device Role / Timing Role: TLC7733IPWR monitors 3.3 V analog supply and asserts RESET until stable, ensuring ADCs and FPGAs initialize only after clean rail establishment. Use Value: Prevents corrupted image acquisition due to premature clock enable or digital logic activation under marginal supply conditions. |
Use Scenario: Programmable logic controllers endure wide ambient temperature swings and intermittent AC line drops in factory environments. IC Role / Device Role / Timing Role: TLC7733IPWR supervises 5 V I/O bus voltage and generates 2.1 ms reset pulse via 100 nF capacitor to meet IEC 61000-4-11 immunity requirements. Use Value: Eliminates spurious reboots during brief dips (<10 ms), maintaining deterministic state machine behavior and process continuity. |
| Portable Diagnostic Device Battery Backup | Automotive Infotainment MCU Supervision |
Use Scenario: Handheld ECG analyzers retain patient waveform history in SRAM during battery swap or charging interruption. IC Role / Device Role / Timing Role: TLC7733IPWR's CONTROL pin ties to main supply; RESET drives SRAM CS, disabling writes while backup battery sustains memory. Use Value: Guarantees zero data loss during 100 ms–2 s power transitions - critical for FDA-regulated clinical data integrity. |
Use Scenario: Head unit MCUs must survive load-dump transients and cold-crank voltage sags (down to 2.5 V) without lockup. IC Role / Device Role / Timing Role: TLC7733IPWR monitors 3.3 V LDO output; its 2.93 V threshold aligns with automotive 3.3 V rail tolerance (±5%) and provides margin against noise-induced false trips. Use Value: Delivers deterministic reset response within 5 µs propagation delay - faster than most MCU internal POR, improving system robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3 V threshold, 350 nA quiescent current, no CONTROL pin, 200 ms min delay (non-programmable) | Lacks RAM power-down control; suited for ultra-low-power always-on sensors but not battery-backed memory systems | Select when lowest possible current dominates and delay timing is fixed; verify 3.3 V vs. 2.93 V trip point matches rail tolerance |
| MAX6326UT33D3+T | 3.3 V threshold, 1.6 µA quiescent current, push-pull RESET, no SENSE hysteresis spec, -40°C to 125°C rating | Higher temp grade and lower current, but lacks hysteresis and CONTROL functionality - less robust in noisy industrial settings | Choose for extended temperature operation where hysteresis is managed externally; confirm push-pull drive compatibility with target MCU |
Compared with TLC7733IPWR, TPS3808G33DBVR offers 50× lower supply current but forfeits programmable delay and RAM control; MAX6326UT33D3+T adds extended temperature range and push-pull output but removes hysteresis and CONTROL pin-making TLC7733IPWR uniquely balanced for cost-sensitive industrial and medical designs requiring flexibility and proven reliability.
Availability
TLC7733IPWR is available at Aetrix Electronics and suitable for medical imaging power sequencing, industrial PLC I/O modules, portable diagnostic device battery backup, and automotive infotainment MCU supervision requiring stable component supply and long-term production continuity.
Supply support for TLC7733IPWR 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 microcomputer and microprocessor systems-prioritizing low current, precise thresholds, and robust reset timing across harsh operating conditions.
FAQ
What is the exact threshold voltage of the TLC7733IPWR and how does hysteresis affect its operation?
The TLC7733IPWR has a nominal negative-going input threshold voltage (VIT–) of 2.93 V, with a typical hysteresis of 70 mV. This means the device asserts RESET when SENSE voltage falls to 2.93 V, and releases RESET only after SENSE rises above 3.00 V. Hysteresis prevents chatter during slow-rising or noisy supply ramps, ensuring clean, glitch-free reset signaling in the TLC7733IPWR.
Can the TLC7733IPWR be used to supervise a 3.3 V rail, and what margin does it provide?
Yes, the TLC7733IPWR is optimized for 3.3 V rail supervision: its 2.93 V threshold provides 0.37 V (11.2%) headroom below nominal voltage, accommodating standard ±5% tolerance (3.135–3.465 V) and transient droop. This margin ensures reliable detection of brownouts while avoiding false trips from ripple or noise-critical for stable operation of the TLC7733IPWR in real-world embedded systems.
How is the reset delay time calculated for the TLC7733IPWR, and what capacitor value yields a 2.1 ms delay?
The TLC7733IPWR uses the formula td = 2.1 × 104 × CT, where CT is in farads and td in seconds. For a 2.1 ms delay, solve: CT = 2.1 × 10−3 / 2.1 × 104 = 100 nF. A 100 nF ceramic capacitor (X7R, 10% tolerance) placed between CT pin and GND achieves this exact delay-verified in TI's SLVS087M datasheet for the TLC7733IPWR.
Does the TLC7733IPWR support battery-backed SRAM retention, and how is it implemented?
Yes, the TLC7733IPWR supports battery-backed SRAM retention via its CONTROL pin. When CONTROL is tied to GND, RESET becomes active-high-enabling direct connection to SRAM chip select (CS). During main supply failure, the TLC7733IPWR disables the SRAM while battery power sustains memory contents. This function is explicitly documented in Figure 10 of the TLC7733IPWR datasheet.
What package and environmental ratings apply to the TLC7733IPWR?
The TLC7733IPWR uses an 8-pin TSSOP (PW) package: 3.0 mm × 3.0 mm body, 0.65 mm pitch, RoHS-compliant NIPDAU finish, and MSL Level-1 (unlimited floor life). It is rated for –40°C to +85°C operation, with 2 kV HBM ESD protection. These specifications are confirmed in TI's PACKAGE OPTION ADDENDUM for the TLC7733IPWR orderable part number.
TLC7733IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TLC7733IPWR FAQ
1.How can I place an order for TLC7733IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7733IPWR 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 TLC7733IPWR reliable?
The price and inventory of TLC7733IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7733IPWR is usually 5 days.
3.What payment methods are accepted for TLC7733IPWR?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7733IPWR?
TLC7733IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7733IPWR 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 TLC7733IPWR?
For technical support, including TLC7733IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7733IPWR requirements.
6.How does Aetrix verify that TLC7733IPWR is sourced from the original manufacturer or authorized distributors?
All TLC7733IPWR 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 TLC7733IPWR meets industry standards.
7.What is the process for return or replacement of TLC7733IPWR?
All TLC7733IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC7733IPWR, 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 TLC7733IPWR part is unused and in its original packaging.
Return procedure for TLC7733IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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