CD4538
CD4538 is the I-CORE functional equivalent of CD4538B / HEF4538B: dual precision monostable multivibrator, TSSOP-16 / SOP-16, 3–12 V, −40 to 125 °C. Factory-original stock in Shenzhen; free samples with shipping paid.
Key specifications
| Manufacturer | I-CORE (Wuxi I-CORE Electronics Co., Ltd.) |
|---|---|
| Part number | CD4538 |
| Function | Dual Precision Monostable Multivibrator |
| Package | TSSOP-16 / SOP-16 |
| Order codes in stock | CD4538, CD4538SA16.TB, CD4538SA16.TR |
| Supply voltage | 3–12 V |
| Operating temperature | −40 to 125 °C |
| Replaces | CD4538B |
| HEF4538B | |
| Compliance | RoHS (EU 2011/65/EU + 2015/863) and REACH SVHC — third-party lab tested; reports on request |
| Datasheet | PDF, English |
Questions buyers ask
- Can CD4538 replace CD4538B?
- CD4538 is I-CORE's functional equivalent of CD4538B, HEF4538B in the same TSSOP-16 / SOP-16 package. Standard parts in this family share the industry pinout, but please compare both datasheets — supply range, timing and absolute maximum ratings — before design-in.
- What is the supply voltage and temperature range of CD4538?
- Supply: 3–12 V. Operating temperature: −40 to 125 °C. See the datasheet for full electrical characteristics.
- Is CD4538 in stock, and can I get a free sample?
- Yes, it is held in stock in Shenzhen. Free samples are available for evaluation, with shipping paid by us. For production orders, SMD parts can be ordered from 1 pc and DIP parts ship in full tubes; orders ship within 2–3 business days after payment.
- Is it original I-CORE product?
- Yes. We supply factory-original I-CORE (Wuxi I-CORE Electronics) parts in sealed reels and tubes. Our ISO 9001, ISO 14001 and ISO 45001 certificates are shown on the home page; RoHS and REACH test reports are available on request.
Datasheet highlights
From the I-CORE English datasheet CD4538-AX-LJ-D022EN (revision 2023-04-B1). The full datasheet PDF is linked above.
General description
The CD4538 is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has an active LOW trigger/retrigger input (nA), an active HIGH trigger/retrigger input (nB), an overriding active LOW — direct reset input (nCD), an output (nQ) and its complement (nQ), and two pins (nREXT/CEXT, and nCEXT, always connected to ground) for connecting the external timing components CEXT and REXT. Typical pulse width variation over the specified temperature range is ±0.2%. The multivibrator may be triggered by either the positive or the negative edges of the input pulse and will produce an accurate output pulse with a pulse width range of 10us to infinity. The duration and accuracy of the output pulse are determined by the external timing components CEXT and REXT. The output pulse width (tW) is equal to REXT×CEXT.
Key features
- Wide supply voltage range from 3V to 12V
- Tolerant of slow trigger rise and fall times
- Fully static operation
- 5V and 10V parametric ratings
- Standardized symmetrical output characteristics
- Specified from -40℃ to +125℃
Request a quote
We reply within 1 business day. Free samples — shipping on us. Tell us the part number, quantity and your application.
Related I-CORE parts
74HC & CD4000 standard logic equivalents → · See all 375 parts →