The Full Form of TSOP is‍ Thin Small Outline Package.

Thin small outline package (TSOP) is a type of surface mount IC package. They are very low-profile (about 1mm) and have tight lead spacing (as low as 0.5mm).

They are frequently used for RAM or Flash memory ICs due to their high pin count and small volume. In some applications, they are being supplanted by ball grid array packages which can achieve even higher densities. The prime application for this technology is memory. SRAM, flash memory, FSRAM and E2PROM manufacturers find this package well suited to their end-use products. It answers the needs required by telecom, cellular, memory modules, PC cards (PCMCIA cards), wireless, netbooks and countless other product applications.

TSOP is the smallest leaded form factor for flash memory.

The Thin Small Outline Package, or TSOP, is a rectangular IC package with a thickness of 1.0 mm. There are two types of TSOP’s. The Type I TSOP has its leads protruding from the shorter edges of the package. The Type II TSOP has its leads protruding from the longer edges of the package.

TSOP lead counts range from 20 to 48. TSOP IC’s are packed in JEDEC trays or tape and reel (quantities may vary)

Thin Small Outline Packages (TSOP) are thin body size components; thickness is 1.0mm. TSOP packages have four sides and are rectangular. Type I TSOPs have the leads protruding from the width portion of the package. Lead counts range from 28 to 48. Package body size ranges from 8×11.8mm to 12x20mm.