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Texas Instruments TL7700CPWR
- Part No.:
- TL7700CPWR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TL7700CPWR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,109
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Product details
Overview
TL7700CPWR from Texas Instruments is a bipolar supply-voltage supervisor IC used for power-on reset generation in microcontroller, DSP, and FPGA systems. It features an adjustable 500 mV (±1%) internal sense threshold, 1.8 V to 40 V wide supply range, –40°C to 85°C operating temperature, and open-collector RESET output with 0.4 V low-level voltage at 1.5 mA. It is deployed in industrial control systems requiring reliable brownout detection.
For engineers reviewing the TL7700CPWR datasheet, TL7700CPWR pinout, TL7700CPWR application, or TL7700CPWR equivalent, key selection considerations include its externally adjustable sense voltage via resistor divider, programmable hysteresis, timing-capacitor–controlled reset pulse duration (0.5–1.5 ms typical), and compatibility with battery-powered, automotive, and AC-line–fed systems.
Technical Context
The TL7700CPWR integrates a precision 1.5 V temperature-compensated reference, fast comparator, timing generator, and npn open-collector output driver. Its SENSE input operates at a fixed 500 mV threshold, enabling external voltage monitoring above 0.5 V using two resistors - one setting hysteresis (via 2.5 µA typ input current) and the other scaling the threshold.
RESET pulse width is set by CT pin current (15 µA typ) charging an external capacitor; tpo = Ct × 10⁵ s, with minimum ~5–10 µs even at CT = 0. The device draws only 0.6 mA at 40 V supply and maintains stable operation across its full 1.8–40 V input range without external regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense threshold | 500 mV ±1% at 25°C; sets minimum detectable supply voltage when used with external resistor divider. |
| Supply voltage range | 1.8 V to 40 V; supports direct connection to unregulated rails including automotive battery (12 V), industrial 24 V, and AC/DC outputs. |
| Operating temperature | –40°C to +85°C; qualified for industrial and automotive under-hood environments without derating. |
| Reset output type | npn open-collector; requires external pullup for active-low reset signaling to MCUs/FPGAs with standard logic thresholds. |
| Timing capacitor current | 15 µA typical; linearly charges external CT to generate precise, user-defined reset pulse durations (e.g., 1 ms with 0.01 µF). |
| Supply current | 0.6 mA typical at VCC = 40 V; enables low-power supervision in battery-backed or energy-constrained systems. |
| Input hysteresis control | Set via R1 resistor using 2.5 µA typical SENSE input current; prevents chatter during noisy or slowly ramping supply transitions. |
Pinout & Package
TSSOP-8 (PW) package: 3.00 mm × 4.40 mm body, 0.65 mm pitch, exposed pad not present, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CT | Timing capacitor interface | Connects to external capacitor to set RESET pulse duration; internally sourced with 15 µA constant current. |
| 2 SENSE | Voltage monitoring input | Fixed 500 mV comparator threshold; accepts scaled system voltage via resistor divider for adjustable trip point. |
| 3 NC | No internal connection | Unbonded pin; must be left floating or tied to GND per layout best practice - no electrical function. |
| 4 GND | Ground reference | Low-impedance return path for internal circuitry and RESET output; critical for noise immunity in reset timing. |
| 5 RESET | Open-collector reset output | Active-low signal; sinks up to 3 mA; requires external pullup to VCC or logic rail for MCU/FPGA reset assertion. |
| 6 NC | No internal connection | Unbonded pin; electrically isolated - no routing or connection required on PCB. |
| 7 NC | No internal connection | Unbonded pin; no internal bond wire; leave unconnected per TI mechanical data. |
| 8 VCC | Power supply input | Accepts 1.8–40 V unregulated input; powers all internal blocks including reference, comparator, and output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable sense voltage | Configurable above 0.5 V using two external resistors - enables supervision of 3.3 V, 5 V, 12 V, or custom rails without redesign. |
| 1.0% sense tolerance | Ensures accurate trip point at 25°C (495–505 mV), minimizing false resets and guaranteeing reliable power-up sequencing. |
| Programmable hysteresis | Set independently via R1 using 2.5 µA input current - eliminates oscillation during marginal supply conditions or ripple. |
| Wide supply range | Operates directly from 1.8 V logic rails to 40 V industrial supplies - eliminates need for LDO or regulator in supervisory path. |
| Low quiescent current | 0.6 mA max at 40 V enables use in always-on battery systems (e.g., backup controllers, smart sensors) with multi-year runtime. |
Applications
| Industrial PLC Power Monitoring | DSP-Based Motor Control |
|---|---|
Use Scenario: Supervises 24 V DC input to programmable logic controller CPU module during cold start and brownout events. IC Role / Device Role / Timing Role: TL7700CPWR acts as primary power-on reset generator, asserting active-low RESET until 24 V rail stabilizes above 23.2 V with 100 mV hysteresis. Use Value: Prevents firmware execution on unstable rail; guarantees deterministic boot sequence without external timing components beyond CT and R-divider. |
Use Scenario: Monitors 3.3 V core supply to TMS320C6000-series DSP in servo drive, detecting undervoltage before PWM initialization. IC Role / Device Role / Timing Role: TL7700CPWR provides 1.2 ms reset pulse synchronized to 3.3 V rise time, ensuring DSP internal state machines initialize cleanly. Use Value: Eliminates need for discrete comparator + RC timer; reduces BOM count while maintaining ±1% trip accuracy over temperature. |
| Notebook System Management | FPGA Configuration Integrity |
Use Scenario: Tracks 5 V standby (5VSB) rail in ultrabook platform to enable EC-controlled wake-from-suspend and safe shutdown. IC Role / Device Role / Timing Role: TL7700CPWR senses 5VSB decay below 4.75 V and holds RESET active for 800 µs, allowing embedded controller to save context. Use Value: Supports rapid, repeatable power-state transitions with sub-millisecond reset timing accuracy and no software dependency. |
Use Scenario: Validates 1.2 V VCCINT supply to Xilinx Artix-7 FPGA before configuration bitstream loading from SPI flash. IC Role / Device Role / Timing Role: TL7700CPWR triggers RESET until VCCINT exceeds 1.15 V and remains stable for ≥1 ms, preventing partial configuration failure. Use Value: Guarantees FPGA starts only with valid core voltage - avoids bitstream corruption and reduces field returns due to power sequencing errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G01DBVR | CMOS-based, 1% accuracy, fixed 1.0 V threshold; requires external resistor for adjustable versions; 2.5 µA IQ vs TL7700CPWR's 600 µA. | Lower power but narrower 1.8–6.5 V supply range; unsuitable for 12 V/24 V industrial rails without level-shifting. | Select when ultra-low IQ is critical and supply rail ≤6.5 V; verify hysteresis adjustability matches design requirements. |
| MAX6816EUT+T | Bipolar, 500 mV threshold, 1.8–5.5 V supply range, 10 µs propagation delay; no CT pin - fixed 200 ms reset timeout. | Lacks programmable pulse width and wide-voltage capability; limited to low-voltage digital systems only. | Choose only for simple 3.3 V/5 V systems needing fixed-duration reset; avoid where adjustable timing or >5.5 V operation is required. |
Compared with TPS3808G01DBVR and MAX6816EUT+T, the TL7700CPWR uniquely supports 1.8–40 V direct operation, user-defined reset pulse width via CT, and simultaneous threshold/hysteresis adjustment - making it the only option for robust, scalable supervision across mixed-voltage industrial platforms.
Availability
TL7700CPWR is available at Aetrix Electronics and suitable for industrial control systems, FPGA power sequencing, and automotive body electronics requiring stable component supply with guaranteed long-term continuity.
Supply support for TL7700CPWR 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The TL7700CPWR belongs to TI's legacy bipolar supervisor product line, engineered specifically for high-reliability power monitoring in unregulated, wide-input-voltage environments where precision, stability, and simplicity are essential.
FAQ
What is the exact function of the CT pin on the TL7700CPWR?
The CT pin on the TL7700CPWR sources a constant 15 µA (typical) current to charge an external timing capacitor. This controls the duration of the active-low RESET pulse: tpo ≈ Ct × 10⁵ seconds. For example, a 0.01 µF capacitor yields ~1 ms reset pulse. Even with CT = 0, minimum pulse width remains ~5–10 µs due to internal comparator response limits.
Can the TL7700CPWR monitor a 12 V supply directly?
Yes, the TL7700CPWR can monitor a 12 V supply directly because its VCC pin accepts 1.8 V to 40 V. To supervise 12 V, connect it through a resistor divider to the SENSE pin so the divided voltage reaches 500 mV at the desired trip point (e.g., 11.5 V). The internal 500 mV reference and 2.5 µA SENSE input current enable precise, temperature-stable scaling.
Does the TL7700CPWR require an external pullup resistor on the RESET pin?
Yes, the TL7700CPWR RESET pin is an npn open-collector output and requires an external pullup resistor to a logic-compatible voltage (e.g., VCC or I/O rail). Typical values range from 2.2 kΩ to 10 kΩ. Without it, the output cannot assert a valid HIGH state, and downstream devices like MCUs will not release from reset properly.
How is hysteresis set on the TL7700CPWR, and what is its design impact?
Hysteresis on the TL7700CPWR is set by resistor R1 connected between SENSE and VCC, using the device's 2.5 µA (typical) SENSE input current: Vhys ≈ 2.5 µA × R1. This prevents repeated toggling during supply ripple or slow decay. For a 100 mV hysteresis, R1 = 40 kΩ. Accurate hysteresis improves system robustness in electrically noisy industrial environments.
Is the TL7700CPWR pin-compatible with other packages in the TL7700 family?
Yes, the TL7700CPWR (TSSOP-8) shares identical pinout and functionality with TL7700CDGKR (VSSOP-8), TL7700CP (PDIP-8), and TL7700CPS (SO-8). All variants use the same 8-pin arrangement: CT–SENSE–NC–GND–RESET–NC–NC–VCC. This allows drop-in replacement across packages without PCB redesign, provided thermal and layout constraints are met.
TL7700CPWR 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:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 10µs Maximum Propagation Delay
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TL7700CPWR FAQ
1.How can I place an order for TL7700CPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7700CPWR 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 TL7700CPWR reliable?
The price and inventory of TL7700CPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7700CPWR is usually 5 days.
3.What payment methods are accepted for TL7700CPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7700CPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7700CPWR?
TL7700CPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7700CPWR 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 TL7700CPWR?
For technical support, including TL7700CPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7700CPWR requirements.
6.How does Aetrix verify that TL7700CPWR is sourced from the original manufacturer or authorized distributors?
All TL7700CPWR 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 TL7700CPWR meets industry standards.
7.What is the process for return or replacement of TL7700CPWR?
All TL7700CPWR units undergo pre-shipment inspection (PSI). If there is an issue with TL7700CPWR, 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 TL7700CPWR part is unused and in its original packaging.
Return procedure for TL7700CPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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