CY74FCT157T

D Function, Pinout, and Drive Compatible With FCT and F Logic D Reduced VOH (Typically = 3.3 V) Versions of Equivalent FCT Functions D Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics D Ioff Supports Partial-Power-Down Mode Operation D Matched Rise and Fall Times D Fully Compatible With TTL Input and Output Logic Levels D ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model (A114-A) – 200-V Machine Model (A115-A) – 1000-V Charged-Device Model (C101) D CY54FCT157T – 32-mA Output Sink Current – 12-mA Output Source Current D CY74FCT157T – 64-mA Output Sink Current – 32-mA Output Source Current D 3-State Outputs CY54FCT157T, CY74FCT157T QUAD 2-INPUT MULTIPLEXERS WITH 3-STATE OUTPUTS SCCS014B – MAY 1994 – REVISED NOVEMBER 2001 CY74FCT157T . . . Q OR SO PACKAGE (TOP VIEW) S I0a I1a Ya I0b I1b Yb GND 1 2 3 4 5 6 7 8 16 VCC 15 E 14 I0d 13 I1d 12 Yd 11 I0c 10 I1c 9 Yc CY54FCT157T . . . L PACKAGE (TOP VIEW) I0a S NC VCC E I1a 3 2 1 20 19 4 18 I0d Ya 5 17 I1d NC 6 16 NC I0b 7 15 Yd I1b 8 14 I0c 9 10 11 12 13 Yb GND NC Yc I1c description NC – No internal connection The ’FCT157T devices are quad two-input multiplexers that select four bits of data from two sources under the control of a common data-select (S) input. The output-enable (E) input is active low. When E is high, all of the outputs (Y) are forced low, regardless of all other input conditions. Moving data from two groups of registers to four common output buses is a common us...