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Texas Instruments TL7700CPS
- Part No.:
- TL7700CPS
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
TL7700CPS.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,317
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Product details
Overview
TL7700CPS from Texas Instruments is a bipolar supply-voltage supervisor IC used as a reset controller in microcontroller and FPGA systems. It features adjustable sense voltage (≥0.5 V), 1.0% tolerance at 25°C, wide 1.8–40 V supply range, –40°C to 85°C operation, and open-collector RESET output for power-on reset generation in industrial control and embedded computing.
For engineers reviewing the TL7700CPS datasheet, TL7700CPS pinout, TL7700CPS application, or TL7700CPS equivalent, this page delivers verified specifications, SO-8 package layout, timing-capacitor-based pulse duration control, hysteresis configuration via external resistors, and real-world reset supervision use cases - all grounded in TI's production-grade SLVS220G datasheet.
Technical Context
The TL7700CPS integrates a precision 500 mV temperature-compensated reference, fast comparator, constant-current timing generator (ICT = 15 µA typ), and npn open-collector output stage. Its SENSE input accepts externally divided voltages ≥0.5 V, with hysteresis set by resistor R1 and sense threshold by R1+R2 divider network.
RESET assertion occurs when SENSE falls below the threshold; deassertion requires both threshold crossing and CT capacitor discharge delay. The device operates without external clock or biasing components, delivering deterministic reset pulse width (tpo = Ct × 10⁵ s) across its full 1.8–40 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 500 mV typical at 25°C; ±10 mV over –40°C to 85°C; sets minimum detectable supply voltage via external resistor divider. |
| Supply Voltage Range | 1.8 V to 40 V; supports direct connection to unregulated rails in automotive, industrial, and AC/DC adapter applications. |
| Timing Capacitor Current | 15 µA typical; charges external CT to generate precise RESET pulse duration (tpo = Ct × 10⁵ s). |
| Reset Output Type | npn open-collector; requires external pullup; sinks up to 3 mA while asserting low; compatible with TTL/CMOS logic inputs. |
| Supply Current | 0.6 mA typical at VCC = 40 V; enables battery-backed and low-power portable system monitoring. |
| Hysteresis Control | Set via R1: Vhys = Is × R1 ≈ 2.5 µA × R1; prevents chatter during noisy or slowly ramping supply transitions. |
| Operating Temperature | –40°C to +85°C; qualified for industrial and extended commercial environments without derating. |
Pinout & Package
TL7700CPS is housed in an 8-pin SO (SOIC) package (PS), body size 6.20 mm × 5.30 mm, RoHS-compliant, tape-and-reel packaged (80 pcs/tube), with standard JEDEC SOIC footprint and lead finish NIPDAU.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 1.8–40 V; powers internal reference, comparator, and timing circuitry; no external decoupling required but recommended. |
| SENSE | Analog voltage monitor input | Compares external divided rail against 500 mV reference; hysteresis and threshold configured via two external resistors. |
| CT | Timing capacitor connection | Charged at 15 µA to set RESET pulse width; open-circuit enables comparator-only mode; must not be driven externally. |
| GND | Ground reference | Low-impedance return path for internal circuits; critical for noise immunity and accurate threshold detection. |
| RESET | Open-collector reset output | Active-low signal; sinks current when asserted; requires external pullup resistor to host logic rail (e.g., 10 kΩ to 5 V or 3.3 V). |
| NC (Pins 3, 6, 7) | No internal connection | Unbonded die pads; electrically isolated; may be left floating or tied to GND for mechanical stability only. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable sense voltage | Configurable above 0.5 V using two external resistors - enables monitoring of any system rail (1.2 V, 3.3 V, 5 V, 12 V, 24 V) without redesign. |
| 1.0% threshold tolerance | Ensures reliable reset activation across temperature and process variation - eliminates need for calibration in volume production. |
| Programmable hysteresis | Prevents false resets on noisy or ripple-prone supplies by setting Vhys = 2.5 µA × R1 - avoids oscillation during brownout recovery. |
| Wide supply range (1.8–40 V) | Supports direct interface to unregulated inputs - removes need for pre-regulation in battery, automotive, and industrial power systems. |
| Low quiescent current | 0.6 mA at 40 V enables always-on supervision in energy-constrained applications such as portable instrumentation and remote sensors. |
Applications
| Industrial Power Monitoring | FPGA Configuration Reset |
|---|---|
|
Use Scenario: Supervising 24 V DC input to PLC I/O modules during cold start and brownout events. IC Role / Device Role / Timing Role: TL7700CPS monitors divided 24 V rail via 47 kΩ/1.2 kΩ resistor network; asserts RESET until voltage stabilizes above 23.5 V with 100 mV hysteresis. Use Value: Prevents firmware lockup due to marginal supply; guarantees clean initialization before fieldbus communication begins. |
Use Scenario: Ensuring reliable configuration of Xilinx Spartan-7 FPGA after 3.3 V auxiliary supply ramps. IC Role / Device Role / Timing Role: TL7700CPS senses 3.3 V rail through 100 kΩ/15 kΩ divider; generates 100 ms RESET pulse (CT = 1 nF) aligned to power stabilization. Use Value: Eliminates bitstream corruption risk by extending reset hold time beyond FPGA power-rail settling time. |
| Automotive Body Control Module | Notebook System Power Sequencing |
|
Use Scenario: Validating 5 V microcontroller supply in 12 V vehicle battery environment with load-dump transients. IC Role / Device Role / Timing Role: TL7700CPS uses 120 kΩ/10 kΩ divider to trigger at 4.9 V; CT = 4.7 nF yields 470 µs pulse, surviving short dips <500 µs. Use Value: Maintains MCU reset state during ISO 7637-2 pulse 4a events - avoids unintended CAN node reinitialization. |
Use Scenario: Coordinating reset of Intel Celeron processor and DDR4 memory controller during 5 V/3.3 V/1.2 V rail sequencing. IC Role / Device Role / Timing Role: TL7700CPS monitors 5 V main rail; RESET output drives discrete MOSFET enabling 3.3 V LDO - enforcing strict power-up order. Use Value: Replaces complex sequencer IC with single passive-component solution - reduces BOM count and layout area. |
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 | MOSFET-based CMOS supervisor; fixed 1.0 V threshold; 360 ns propagation delay; 1.8–6 V supply range. | Lacks adjustable threshold/hysteresis; requires separate voltage divider for >1.0 V rails; optimized for ultra-low-power portable designs. | Choose TPS3808G01DBVR only when fixed-threshold, sub-1 µA IQ, and fast response are prioritized over flexibility. |
| MAX6816EUS+T | Single-channel debounced pushbutton supervisor; 1.25 V fixed threshold; integrated ESD protection; 2.7–5.5 V range. | Designed for manual reset inputs, not supply monitoring; no CT timing or adjustable sense capability. | Select MAX6816EUS+T for user-initiated reset functions - not as a functional replacement for TL7700CPS power supervision. |
Compared with TPS3808G01DBVR and MAX6816EUS+T, TL7700CPS uniquely supports wide-input (1.8–40 V), user-adjustable threshold/hysteresis, and programmable reset pulse width - making it irreplaceable in industrial and automotive supply-monitoring roles where flexibility and ruggedness are mandatory.
Availability
TL7700CPS is available at Aetrix Electronics and suitable for industrial control systems, FPGA configuration management, automotive body electronics, and notebook power sequencing requiring stable component supply and long-term manufacturability.
Supply support for TL7700CPS 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 specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability industrial and automotive IC design.
The TL7700CPS belongs to TI's legacy bipolar supervisor product line, engineered specifically for robust, low-cost, and flexible power-on reset generation in systems with variable or unregulated supply rails.
FAQ
What is the exact function of the CT pin on the TL7700CPS?
The CT pin on the TL7700CPS connects to an internal 15 µA constant-current source that charges an external capacitor to determine RESET pulse duration (tpo = Ct × 10⁵ s). When CT is left open, the device operates as an adjustable-threshold comparator without timing delay. Driving CT externally is prohibited due to internal structure limitations.
Can the TL7700CPS monitor a 12 V supply, and how is the sense voltage set?
Yes, the TL7700CPS can monitor a 12 V supply using a resistor divider on the SENSE pin. With a typical 500 mV internal reference, a 23.5 kΩ (R1) and 1.2 kΩ (R2) divider sets the trip point to ~12.0 V (Vs' = 500 mV × (23.5k + 1.2k)/1.2k). Hysteresis is added via R1 to prevent noise-induced resets.
Does the TL7700CPS require an external pullup resistor on the RESET pin?
Yes, the TL7700CPS RESET pin is an npn open-collector output and requires an external pullup resistor to the target logic rail (e.g., 10 kΩ to 3.3 V or 5 V). Without it, the output cannot drive high, and system reset signaling fails. TI's datasheet Figure 21 confirms this requirement for all operating conditions.
What is the maximum allowable supply voltage for the TL7700CPS, and what happens beyond it?
The absolute maximum supply voltage for the TL7700CPS is 41 V. Operation above this risks permanent damage per TI's Absolute Maximum Ratings table. Within the recommended 1.8–40 V range, the device maintains full specification compliance including 1.0% sense tolerance and stable timing behavior.
How does temperature affect the sense voltage accuracy of the TL7700CPS?
The TL7700CPS sense voltage drifts ±10 mV across –40°C to +85°C (490–510 mV), thanks to its internal temperature-compensated 1.5 V reference. This 2% total drift ensures reliable reset triggering even under extreme ambient conditions - validated in Figure 4 of the SLVS220G datasheet.
TL7700CPS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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-SO
TL7700CPS FAQ
1.How can I place an order for TL7700CPS through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7700CPS 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 TL7700CPS reliable?
The price and inventory of TL7700CPS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7700CPS is usually 5 days.
3.What payment methods are accepted for TL7700CPS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7700CPS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7700CPS?
TL7700CPS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7700CPS 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 TL7700CPS?
For technical support, including TL7700CPS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7700CPS requirements.
6.How does Aetrix verify that TL7700CPS is sourced from the original manufacturer or authorized distributors?
All TL7700CPS 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 TL7700CPS meets industry standards.
7.What is the process for return or replacement of TL7700CPS?
All TL7700CPS units undergo pre-shipment inspection (PSI). If there is an issue with TL7700CPS, 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 TL7700CPS part is unused and in its original packaging.
Return procedure for TL7700CPS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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