RS232 transceiver in a through-hole DIP — what the 250 kBd and 400 mV hysteresis mean for your serial link
The Analog Devices LT1180ACN#PBF is a full-duplex RS232 transceiver packing two drivers and two receivers in an 18-pin DIP package for through-hole assembly. The 400 mV of receiver hysteresis cleans up noisy signals on longer cable runs, reducing the chance of a false start bit on an idle line.
Second-source option — ADM202JNZ as a pin-compatible alternative
For dual-sourcing or supply resilience, the ADM202JNZ from Analog Devices is a functional second source. It matches the full-duplex RS232 protocol, 2/2 driver/receiver count, 400 mV receiver hysteresis, 18-DIP through-hole package, and the same 4.5 V supply minimum. The data rate is identical at 250 kBd, and the temperature range is also 0°C to 70°C. The ADM202JNZ can be qualified as a drop-in alternate without board respin.