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Texas Instruments TL7700CP
- Part No.:
- TL7700CP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL7700CP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:389
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Product details
Overview
TL7700CP from Texas Instruments is a bipolar supply-voltage supervisor IC used as a reset controller in microcomputer and microprocessor systems. It features adjustable sense voltage (≥0.5 V), 1.0% tolerance at 25°C, adjustable hysteresis via external resistors, wide 1.8 V to 40 V supply range, and operates from –40°C to 85°C - enabling reliable power-on reset generation in industrial control and embedded computing applications.
For engineers reviewing the TL7700CP datasheet, TL7700CP pinout, TL7700CP application, or TL7700CP equivalent, this page delivers verified technical context, exact pin functions for the PDIP-8 package, real-world timing and sensing specifications, and two confirmed alternative parts with documented functional differences for system-level reset design.
Technical Context
The TL7700CP integrates a precision 1.5-V temperature-compensated voltage reference, fast comparator, timing generator, and open-collector NPN output driver. Its SENSE input uses an internal 500 mV threshold with ±5 mV typical variation at 25°C, and hysteresis is set externally via resistor R1 using the 2.5 µA (typ) SENSE bias current.
Reset pulse duration (tpo) is controlled by a 15 µA (typ) constant-current source charging an external timing capacitor (CT); tpo ≈ CT × 10⁵ seconds, with minimum response of ~5–10 µs even when CT = 0. The device remains functional across its full 1.8 V–40 V VCC range with only 0.6 mA (typ) supply current at 40 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense threshold voltage | 500 mV typical at 25°C; sets minimum detectable supply rail voltage before reset assertion |
| Sense voltage tolerance | ±1.0% at 25°C; ensures accurate reset point across production units without calibration |
| Supply voltage range | 1.8 V to 40 V; supports direct monitoring of 3.3 V, 5 V, 12 V, 24 V, and 36 V rails without external regulators |
| Operating temperature | –40°C to +85°C; qualified for industrial and automotive under-hood environments |
| Supply current (ICC) | 0.6 mA typical at VCC = 40 V; enables low-power operation in battery-backed or energy-constrained systems |
| Timing capacitor charge current | 15 µA typical; defines linear ramp slope for precise, resistor-free reset pulse duration tuning |
| Output type | Open-collector NPN; requires external pull-up for active-low reset signaling to MCUs, FPGAs, or ASICs |
Pinout & Package
TL7700CP is housed in an 8-pin PDIP (Plastic Dual In-line Package) with body size 9.81 mm × 6.35 mm. Pin 1 is bottom-left corner when notch faces up; pin numbering follows standard DIP convention (counter-clockwise).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CT) | Timing capacitor connection | Drives internal 15 µA current source to set RESET pulse duration; must not be driven externally |
| 2 (SENSE) | Voltage sense input | Compares external divided rail against internal 500 mV reference; hysteresis set via R1 |
| 3 (NC) | No internal connection | Unbonded die pad; must remain unconnected on PCB |
| 4 (GND) | Ground reference | Low-impedance return path for all internal blocks; critical for noise immunity in reset timing |
| 5 (VCC) | Power supply input | Accepts 1.8 V–40 V; powers all internal circuitry including reference, comparator, and output stage |
| 6 (NC) | No internal connection | Unbonded die pad; must remain unconnected on PCB |
| 7 (NC) | No internal connection | Unbonded die pad; must remain unconnected on PCB |
| 8 (RESET) | Active-low reset output | Open-collector NPN; sinks up to 3 mA; requires external pull-up to VCC or logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable sense voltage | Settable >0.5 V using two external resistors - enables monitoring of any regulated rail without custom ICs |
| 1.0% sense tolerance at 25°C | Minimizes risk of false resets or delayed reset assertion across manufacturing lot variations |
| Externally adjustable hysteresis | Controlled by R1 and 2.5 µA (typ) SENSE bias current - prevents chatter during noisy or slowly rising supply transitions |
| Wide 1.8 V–40 V operating range | Eliminates need for external LDO or level-shifter when supervising diverse supply domains (e.g., 3.3 V MCU + 24 V I/O) |
| Low 0.6 mA supply current at 40 V | Reduces standby power draw in always-on systems such as industrial controllers or remote sensors |
Applications
| Industrial Power Monitoring | DSP/MCU Power-On Reset |
|---|---|
Use Scenario: Supervising 24 V DC input to programmable logic controllers (PLCs) with ripple-prone rectified AC front-ends. IC Role / Device Role / Timing Role: TL7700CP monitors the post-filter 24 V rail and asserts RESET until voltage stabilizes above 23.5 V with 100 mV hysteresis. Use Value: Prevents PLC firmware lockup during brownout recovery by guaranteeing clean, glitch-free reset pulse ≥10 ms. |
Use Scenario: Ensuring deterministic startup of a TI C2000™ digital signal processor powered from a 3.3 V LDO. IC Role / Device Role / Timing Role: TL7700CP senses the 3.3 V rail via resistor divider and generates a 100 ms reset pulse after voltage exceeds 3.15 V. Use Value: Meets C2000™ minimum reset hold time while eliminating need for RC-based reset circuits with temperature drift. |
| FPGA Configuration Integrity | Notebook System Management |
Use Scenario: Validating stable 1.2 V core voltage before releasing FPGA configuration clock enable. IC Role / Device Role / Timing Role: TL7700CP's SENSE input tracks 1.2 V rail; CT capacitor sets 200 ms reset pulse to exceed FPGA configuration time. Use Value: Guarantees FPGA starts only after core rail is fully settled, avoiding bitstream load failure or partial configuration. |
Use Scenario: Coordinating reset sequencing between Intel PCH and discrete GPU in a compact notebook platform. IC Role / Device Role / Timing Role: TL7700CP supervises 5 V standby rail and triggers cascaded reset to PCH and GPU controllers via open-collector wired-OR. Use Value: Enables single-supervisor IC to manage multi-rail reset timing without additional logic or delay elements. |
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; no external hysteresis or CT adjustment; 1.8 V–6.5 V VCC range | Limited to low-voltage rails; unsuitable for 12 V+ monitoring or adjustable thresholds | Choose for space-constrained, low-voltage designs where fixed threshold suffices and CT-based timing is unnecessary |
| MAX6816EPA+ | Bipolar, 1.5% accuracy, fixed 4.63 V threshold; no adjustable hysteresis; 4.5 V–5.5 V VCC range only | Only supports 5 V systems; lacks CT timing and external sense flexibility | Use only in legacy 5 V-only systems requiring drop-in replacement with identical pinout and minimal redesign |
Compared with TPS3808G01DBVR and MAX6816EPA+, TL7700CP uniquely supports wide-input voltage supervision (1.8 V–40 V), user-defined sense thresholds (>0.5 V), and precise CT-timed reset pulses - making it irreplaceable in multi-rail industrial and automotive applications requiring field-programmable reset behavior.
Availability
TL7700CP is available at Aetrix Electronics and suitable for industrial control systems, embedded computing platforms, and automotive subsystems requiring stable component supply with long-term lifecycle support.
Supply support for TL7700CP 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.
The TL7700CP belongs to TI's legacy bipolar supervisor product line, designed specifically for robust, wide-input-voltage reset control in harsh environments where CMOS alternatives lack sufficient voltage range or noise immunity.
FAQ
What is the function of the CT pin on the TL7700CP?
The CT pin on the TL7700CP connects to an internal 15 µA (typ) constant-current source that charges an external capacitor to set the RESET output pulse duration (tpo). The relationship is tpo ≈ CT × 10⁵ seconds. Even with CT = 0, the device exhibits ~5–10 µs minimum response due to internal propagation delays. TL7700CP must never have voltage applied to CT - it is a current-sink-only terminal.
Can the TL7700CP monitor a 12 V supply rail?
Yes, the TL7700CP can directly monitor a 12 V supply rail because its VCC operating range extends from 1.8 V to 40 V. To sense 12 V, use a resistor divider network at the SENSE pin to scale the voltage down to ≥0.5 V - for example, R1 = 22 kΩ and R2 = 1 kΩ yields Vs' ≈ 11.5 V threshold. TL7700CP's internal 500 mV reference and 2.5 µA bias current enable precise, temperature-stable scaling.
Does the TL7700CP require an external pull-up resistor on the RESET pin?
Yes, the TL7700CP RESET pin is an open-collector NPN transistor output and requires an external pull-up resistor to VCC or another logic rail. Typical values range from 2.2 kΩ to 10 kΩ depending on rise-time requirements and bus loading. Without the pull-up, RESET remains floating when inactive, risking undefined logic states in connected MCUs or FPGAs - a mandatory design requirement for TL7700CP implementation.
How is hysteresis set on the TL7700CP?
Hysteresis on the TL7700CP is set externally using resistor R1 in series with the SENSE pin. The hysteresis voltage (Vhys) equals Is × R1, where Is is the SENSE input bias current (2.5 µA typical at 25°C). For example, R1 = 100 kΩ yields ~250 mV hysteresis. This prevents reset toggling during supply ripple or slow-rising conditions - a key design feature confirmed in TL7700CP's functional description and Figure 19.
Is the TL7700CP RoHS compliant?
Yes, the TL7700CP is RoHS compliant, as confirmed in Texas Instruments' official packaging addendum: "RoHS: Yes" and "Lead finish/NIPDAU" for the PDIP package. It meets EU Directive 2011/65/EU requirements and carries no exemptions. TL7700CP is rated for industrial temperature range (–40°C to +85°C) and qualifies for lead-free reflow assembly per JEDEC J-STD-020.
TL7700CP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TL7700CP FAQ
1.How can I place an order for TL7700CP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7700CP 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 TL7700CP reliable?
The price and inventory of TL7700CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7700CP is usually 5 days.
3.What payment methods are accepted for TL7700CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7700CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7700CP?
TL7700CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7700CP 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 TL7700CP?
For technical support, including TL7700CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7700CP requirements.
6.How does Aetrix verify that TL7700CP is sourced from the original manufacturer or authorized distributors?
All TL7700CP 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 TL7700CP meets industry standards.
7.What is the process for return or replacement of TL7700CP?
All TL7700CP units undergo pre-shipment inspection (PSI). If there is an issue with TL7700CP, 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 TL7700CP part is unused and in its original packaging.
Return procedure for TL7700CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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MIC826SYMT-TR
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