Is there a pin-compatible replacement for RS721XF?

Several op-amps like RS321BKXF and TP6001-TR share the SOT23-5 package and a standard pinout, but they are not electrically equivalent due to much lower speed. Pinout and performance must be verified.

What risks should I check before replacing RS721XF?

The main risk is performance degradation. Check if your circuit's stability and signal integrity depend on the target's 10MHz gain-bandwidth and 7V/µs slew rate. Lower-speed substitutes may cause issues.

RS721XF Alternatives, Datasheet & Cross Reference | Jiangsu Runic Technology Co., Ltd.

RS721XF is a 10MHz CMOS op-amp in a SOT23-5 package. Finding a direct, pin-compatible replacement requires careful matching of dynamic performance like bandwidth and slew rate.

AI replacement insight

Electrical riskhigh

Bandwidth and slew rate are ~10x lower, impacting high-frequency performance.

Package risklow

Candidates share the same SOT23-5 package, but pinout requires verification.

Can it be replaced directly?

No direct, fully equivalent replacement was found. All candidates have significantly lower dynamic performance (bandwidth and slew rate).

Best replacement path

Downgrade to a lower-speed op-amp like RS321BKXF if the application is not speed-sensitive and can tolerate the performance difference.

Main risk

Significant performance downgrade in bandwidth and slew rate, which can affect signal integrity and circuit stability.

Recommended alternatives

Matches package and voltage, but is a major performance downgrade. Not a drop-in replacement.

View details

Alternative comparison matrix

Feature / factor	RS721XF	RS321BKXF	TP6001-TR	RS8411BXF	Compatibility / risk
Package	SOT23-5	SOT23-5	SOT23-5	SOT23-5	SOT23-5 — Package matches.; TP6001-TR: Package matches.; RS8411BXF: Package matches.
Voltage	2.5V to 5.5V	2.5V to 5.5V	2.1V to 6.0V	3V to 36V	2.5V to 5.5V / 2.1V to 6.0V / 3V to 36V — Supply range matches exactly.; TP6001-TR: Supply range covers target's range.; RS8411BXF: Higher min supply voltage (3V vs 2.5V).
Gain Bandwidth	10 MHz	1 MHz	1 MHz	1.2 MHz	1 MHz / 1.2 MHz — Significantly lower bandwidth.; TP6001-TR: Significantly lower bandwidth.; RS8411BXF: Significantly lower bandwidth.
Slew Rate	7 V/µs	0.45 V/µs	0.7 V/µs	0.67 V/µs	0.45 V/µs / 0.7 V/µs / 0.67 V/µs — Significantly lower slew rate.; TP6001-TR: Significantly lower slew rate.; RS8411BXF: Significantly lower slew rate.
Offset Voltage	0.5 mV	-	±3 mV	-	±3 mV — Higher offset voltage.

Application & sourcing insights

Questions & answers

There are no direct drop-in replacements with matching 10MHz bandwidth. Alternatives like RS321BKXF offer the same package and voltage but have lower speed (1MHz) and require performance verification.