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Pin No (DB25) Pin No (36 pin) Signal name Direction Register - bit Inverted 1 1 Strobe In/out Control-0 Yes 2 2 Data0 Out Data-0 No 3 3 Data1 Out Data-1 No 4 4 Data2 Out Data-2 No 5 5 Data3 Out Data-3 No 6 6 Data4 Out Data-4 No 7 7 Data5 Out Data-5 No 8 8 Data6 Out Data-6 No 9 9 Data7 Out Data-7 No 10 10 Ack In Status-6 No 11 11 Busy In Status-7
An IEEE 1284 36-pin female on a circuit board. In the 1970s, Centronics developed the now-familiar printer parallel port that soon became a de facto standard.Centronics had introduced the first successful low-cost seven-wire print head [citation needed], which used a series of solenoids to pull the individual metal pins to strike a ribbon and the paper.
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For example, DB-25 denotes a D-sub with a 25-position shell size and a 25-position contact configuration. The contacts in each row of these connectors are spaced 326/3000 of an inch apart, or approximately 0.1087 inches (2.76 mm), and the rows are spaced 0.112 inches (2.84 mm) apart; the pins in the two rows are offset by half the distance ...
The Amplimite and MDR connectors are similar in shape and size, but can be distinguished by the former using pin contacts and the latter using wipers. For Wide SCSI-2, the most common connector was the larger 68-pin sibling of the HD50, known as the HD68, MiniD68, HPDB68, and sometimes as "SCSI-3". This is about 1 7/8” (47mm) wide. [3]
A diagram of the DB-25 connector. Date: 18 June 2006 (original upload date) Source: No machine-readable source provided. Own work assumed (based on copyright claims). Author: No machine-readable author provided. Mobius assumed (based on copyright claims). Other versions
The former Soviet Union and Eastern bloc countries used similar packages, but with a metric pin-to-pin spacing of 2.5 mm rather than 0.1 inches (2.54 mm). The number of leads is always even. For 0.3 inch spacing, typical lead counts are 8, 14, 16, and 20; less common are 4, 6, 18, 24, and 28 lead counts.
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