Product Overview
Dual-Driver, Dual-Receiver 1 Mbps RS-232 Transceiver with ±15kV ESD Protection, 20-Pin SSOP
Condition
Unused new old stock (NOS). Markings legible: Maxim logo and MAX3225ECA, with the P that completes MAX3225ECAP opening the line below. Leaded version, marked without the + suffix of the lead-free orderable. Sold each.
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Product Overview
Two RS-232 drivers and two receivers in one 20-pin SSOP, guaranteed to 1 Mbps: Maxim's MAX3225ECAP is the 3 V transceiver for a serial port that needs hardware handshaking and a fast link from a low-voltage logic board. It runs from a single 3.0 V to 5.5 V supply, idles at 1 µA in AutoShutdown Plus, and carries a READY output.
Key Features
- 2 drivers / 2 receivers
- Guaranteed data rate: 1 Mbps
- Supply: 3.0 V to 5.5 V
- Supply current in AutoShutdown Plus: 1 µA
- READY output
- ESD: ±15kV Human Body Model, ±8kV IEC 1000-4-2 contact discharge, ±15kV IEC 1000-4-2 air-gap discharge
- Commercial temperature range: 0°C to +70°C
- Package: 20-pin SSOP, surface mount
- Leaded (non-RoHS) version, no + suffix
Applications
- Adding a DB-9 serial port with RTS/CTS hardware flow control to a 3.3 V microcontroller board: TX and RTS out, RX and CTS in, one chip.
- Running serial links above 115.2k baud, such as 230.4k, 460.8k or 921.6k, inside the 1 Mbps guarantee.
- Battery-powered loggers and handhelds whose serial port sits idle most of the day.
- Reworking or duplicating a board built around MAX3225ECAP with the same leaded part number.
Frequently Asked Questions
The chip reads MAX3225ECA. Is it the MAX3225ECAP?
Yes. Maxim splits the number across two lines on this body: MAX3225ECA on one, and the P that finishes it opens the next.
Will it run from a 3.3 V rail?
Yes. The supply range is 3.0 V to 5.5 V, so it works on 3.3 V and 5 V boards.
Is this the lead-free version?
No. It is the leaded version, marked without the + suffix that the lead-free MAX3225ECAP+ carries.
Is it rated for industrial temperatures?
No. It is the commercial grade, rated 0°C to +70°C, which the C in MAX3225ECAP marks.
RS-232 outlived the teletypes and modems it was written for and still sits on the back panel of lab instruments and industrial controllers. Plenty of low-voltage boards still need to talk to them, and the DB-9 is waiting.
