Part A
TL7702ACDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 5474 Stückzahl
- Package
- SOIC-8
- Series
- PMIC-Kontrolleure
Replacement verdict
Compatible functional replacement candidate
The TL7705ACDR and TL7702ACDR are functionally compatible supply-voltage supervisors in identical SOIC-8 packages, sharing the same reset threshold, reset delay, and supply-voltage range. The TL7702ACDR omits the on-chip reset generator and requires an external RC network on the RESET pin, so designers must validate the timing configuration before substituting it for the TL7705ACDR in existing designs.
Reset Threshold Voltage
High match
Package Type
High match
Reset Delay Configuration
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
TL7705ACDR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2582 Stückzahl
- Package
- SOIC-8
- Series
- PMIC-Kontrolleure
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | TL7705ACDR | TL7702ACDR | Why it matters |
|---|---|---|---|
| Reset Threshold Voltage (V_SENSE) | 4.55 V (typical) | 2.53 V (typical) | Determines the supply voltage level at which the device asserts a reset, so the two parts monitor different nominal rails (5 V vs 3.3 V logic supplies). |
| Threshold Tolerance | ±1% (A-grade) | ±1% (A-grade) | Tighter tolerance ensures a more accurate and repeatable reset trip point across temperature and production spread. |
| Supply Voltage Range (V_CC) | 3.5 V to 18 V | 3.5 V to 18 V | Defines the operating supply window; both parts share the same wide range, allowing similar biasing in system designs. |
| Reset Output Type | Active-low open-collector | Active-low open-collector | Open-collector outputs allow wired-OR reset signaling and flexible pull-up voltage selection for interfacing with different logic families. |
| Reset Pulse Width (t_po) | Programmable via external capacitor | Programmable via external capacitor | The reset delay must be long enough for the processor supply and clock to stabilize before code execution begins. |
| Package | SOIC-8 (D) | SOIC-8 (D) | Identical package and pinout enable drop-in board-level replacement without layout changes. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Confirms both devices are rated for industrial ambient conditions, supporting use in similar environments. |
| Supply Current (I_CC) | 1.5 mA (typical) | 1.5 mA (typical) | Quiescent current affects standby power budget, especially in always-on supervisory circuits. |
| Number of Supervised Voltages | 1 (single SENSE input) | 1 (single SENSE input) | Both monitor a single rail, so they are functionally equivalent in multi-rail systems where only one supply needs supervision. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | TL7702ACDR | TL7705ACDR |
|---|---|---|
| Part Status | Active | Active |
| Type | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 | 1 |
| Voltage - Threshold | 2.53V | 4.55V |
| Output | Complementary | Complementary |
| Reset | Active High/Active Low | Active High/Active Low |
| Reset Timeout | 1µs Maximum Propagation Delay | 1µs Maximum Propagation Delay |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the TL7705ACDR and TL7702ACDR supply voltage supervisors?
The TL7705ACDR is a supply-voltage supervisor designed to monitor a single 5 V rail with a fixed 4.55 V sense threshold and an adjustable reset delay via an external capacitor. The TL7702ACDR is a similar supervisor but features a fixed 2.53 V sense threshold, making it suitable for monitoring lower-voltage logic rails. Both provide active-low reset outputs and are housed in an 8-pin SOIC package.
Are the TL7705ACDR and TL7702ACDR pin-to-pin compatible?
Yes. Both devices are offered in the same 8-pin SOIC (D) package and share an identical pinout: RESET, RESET, SENSE, GND, RESIN, CT, VCC, and RESET. This allows a common PCB footprint, but the different sense thresholds mean they are not electrically interchangeable without verifying the monitored rail voltage.
Can the TL7702ACDR directly replace the TL7705ACDR in a 5 V monitoring application?
No. The TL7702ACDR has a nominal sense threshold of 2.53 V, so it would not assert a reset at the proper 5 V undervoltage point (typically 4.55 V for the TL7705ACDR). Using the TL7702ACDR on a 5 V rail would result in a late or missed reset assertion, compromising system reliability.
What is the reset delay time for each device, and how is it set?
Both devices use an external capacitor connected to the CT pin to set the reset delay time. The delay is approximately proportional to the capacitor value. For the TL7705ACDR, the datasheet provides a typical delay formula; for the TL7702ACDR, the same CT pin function applies. Exact delay times must be calculated using the manufacturer's specified formula and capacitor tolerance.
Do both devices have the same output drive capability and reset output configuration?
Yes. Both the TL7705ACDR and TL7702ACDR provide complementary active-low reset outputs (RESET and RESET) with open-drain or push-pull configurations as specified in the datasheet. They are capable of sinking or sourcing currents typical of standard logic interfaces, but the exact drive strength should be verified from the respective manufacturer datasheet.
What are the recommended operating voltage ranges for the TL7705ACDR and TL7702ACDR?
The TL7705ACDR is intended for 5 V systems, with a supply voltage (VCC) range typically from 3 V to 18 V, while its sense input monitors a 5 V rail. The TL7702ACDR is intended for lower-voltage systems, with a sense threshold of 2.53 V, and its VCC range is also typically 3 V to 18 V. Always confirm the exact limits in the official datasheet.
Are there any differences in operating temperature range or qualification status between the two parts?
Both the TL7705ACDR and TL7702ACDR are typically specified for the industrial temperature range of –40°C to +85°C, as indicated by the "A" suffix in the part number. Qualification status (e.g., automotive AEC-Q100) may differ by manufacturer and ordering option; consult the specific device datasheet for verified qualification data.