Venera 5 launched 1969

Venera 5, launched January 5, 1969, was a Soviet probe to Venus to study its atmosphere. It was similar to the Venera 4, which transmited information about the Venusian atmosphere but did not survive the impact. 

Venera 5 reached Venus on May 16 and entered the atmosphere on the night side of the planet.  It sent data every 45 seconds for 53 minutes before it succumbed to temperature of 608 °F and 26.1 bars of pressure.

Venera 5, Russian probe, lands on Venus 1969

Venera 5 entered the Venusian atmosphere May 16, 1969, just one day before its sister ship Venera 6 arrived. The Soviets had constructed Venera 5 and 6 to be more rugged, based on the data received from Venera 4.  Venera 5 was equipped with smaller parachutes although heavier than Venera 4 so it could enter the atmosphere quicker and send back more data.

Entering the dark side of the planet, Venera 5 successfully transmitted information on the Venusian atmosphere for 53 seconds before failing.