Maxim ICM7555ESA+, 555 Type Timer/Oscillator (Single), 500kHz max frequency, 30µA supply current, 2V to 16.5V supply range, -40°C to 85°C, 8-SOIC package, surface mount, active production, ROHS3 compliant.
$9.99 / ea
2 in stock — maximum per order · 3–4 days lead time
| Parameter / Attribute | Specification / Value |
|---|---|
| Type | 555 Type, Timer/Oscillator (Single) |
| Mounting | Surface Mount |
| Supply voltage | 2V ~ 16.5V |
| Current - supply | 30 µA |
| Frequency | 500kHz |
| Operating temperature | -40°C ~ 85°C |
| Package | Tube |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
Package: DIP-8 / SOIC-8 · Pin-compatible replacements with immediate Shenzhen spot stock
Fifty years after introduction the 555 is still designed in, still taught, and still repaired. The bipolar NE555 remains in mass production across several fabs, so availability is not the issue. The two things that matter are the bipolar-versus-CMOS family boundary - the pinout survives the crossing but the output drive does not - and sourcing lots whose timing and temperature specifications are real; the 555 is a favorite of low-grade clones where timing accuracy is the first spec quietly loosened.
Direct House Second Source
Shenzhen Spot Stock (24-48h Dispatch)
The TI second source of the bipolar 555: same function table, same timing equations (monostable 1.1RC, astable 1.44 / ((R1 + 2R2) C)), supply 4.5V to 16V.
4.5V to 16V; output sinks and sources up to 200mA class; quiescent current milliamps class with the classic crowbar spike at output transitions.
Same Die, Surface-Mount Body
Shenzhen Spot Stock (24-48h Dispatch)
The SMD version of the NE555 in SOIC-8 - identical electrical behavior to the DIP-8 part.
4.5V to 16V; 200mA class output drive, both directions.
CMOS Modernization - Lower Power, Rail-to-Rail Output
Shenzhen Spot Stock (24-48h Dispatch)
CMOS 555: supply 2V to 15V, quiescent current in the hundreds of microamps against roughly 10mA for the bipolar part, no output crowbar current spike at transitions.
2V to 15V; output drive is asymmetric on CMOS: roughly 100mA sink but only about 10mA source typical - far below the bipolar 200mA both ways.
Low-Power CMOS Option with Wide Supply Range
Shenzhen Spot Stock (24-48h Dispatch)
The classic CMOS 555 from the Intersil / Maxim lineage: same timer function, microamp-class quiescent current, no crowbar spike.
Typical 2V to 18V supply window (check the specific vendor datasheet); output drive well below the bipolar 200mA class.
Q: Are all 555 timers interchangeable?
A: Within the bipolar family (NE555, LM555, MC1455, NE555D) yes - identical function and pinout. CMOS versions (TLC555, ICM7555, LMC555) share the pinout but differ in supply range, quiescent current and output drive; check the load before dropping one in.
Q: Can a CMOS 555 replace a NE555 in a relay driver?
A: Usually not directly: the bipolar NE555 sources and sinks up to about 200mA, while CMOS timers source far less (their sink capability is much stronger than source). Either keep a bipolar part or add a driver transistor for the relay.
Q: What is the difference between NE555 and SE555?
A: Same function; the SE prefix is the full military-temperature grade with tighter specifications. An SE555 works wherever an NE555 does; the reverse trades away temperature margin. Commercial NE555s are typically rated 0 to +70 degC, SE555 parts up to +125 degC.
Surface-mount only — no through-hole variant in this order code.
The part is a current catalog item from Maxim Integrated (now part of Analog Devices), so the datasheet, application notes, and SPICE models remain available through the manufacturer's document portal.
Yes, it is pin-compatible with the classic 555 timer footprint in the 8-SOIC package. The key difference is the CMOS output stage and 30 µA supply current versus the bipolar 555's 3-10 mA quiescent draw. For most timing, oscillator, and PWM circuits, it drops in without board changes. Verify the output drive current — the CMOS output sources and sinks less current than a bipolar 555, so heavy loads (relay coils, incandescent lamps) may need a buffer transistor.
It comes in an 8-pin SOIC package (8-SOIC, 0.154" body width, 3.90 mm width). The supplier device package is also 8-SOIC. It is surface-mount only; no DIP variant shares this order code.