74FR573

74FR573 Octal D-Type Latch with 3-STATE Outputs January 1991 Revised August 1999 74FR573 Octal D-Type Latch with 3-STATE Outputs General Description The 74FR573 is a high speed octal latch with buffered common Latch Enable (LE) and buffered common Output Enable (OE) inputs. This device is functionally identical to the 74F573. Features s Broadside pinout aids in PC layout s Functionally identical to the 74F373, 74F573 s Outputs have current sourcing capability of 15 mA and current sinking capability of 64 mA s Guaranteed pin-to-pin skew Ordering Code: Order Number 74FR573SC 74FR573PC Package Number M20B N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol Connection Diagram Pin Descriptions Pin Names OE LE D0–D7 O0–O7 Description Output Enable Input (Active-LOW) Latch Enable Input (Active-HIGH) Data Inputs 3-STATE Latch Outputs © 1999 Fairchild Semiconductor Corporation DS010903 www.fairchildsemi.com 74FR573 Functional Description The 74FR573 contains eight D-type latches with 3-STATE output buffers. When the latch enable (LE) input is HIGH, data on the Dn inputs enters the latches. In this condition the latches are transparent, i.e., a latch output will change state each time its D input changes. When LE is LOW the latches store the...