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CY74FCT138TSOIC Datasheet(PDF) 1 Page - Texas Instruments |
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CY74FCT138TSOIC Datasheet(HTML) 1 Page - Texas Instruments |
1 / 7 page CY54FCT138T, CY74FCT138T 1-OF-8 DECODERS SCCS013B – MAY 1994 – REVISED OCTOBER 2001 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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 Dual 1-of-8 Decoder With Enables 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 CY54FCT138T – 32-mA Output Sink Current – 12-mA Output Source Current D CY74FCT138T – 64-mA Output Sink Current – 32-mA Output Source Current description The ’FCT138T devices are 1-of-8 decoders. These devices accept three binary weighted inputs (A0, A1, A2) and, when enabled, provide eight mutually exclusive active-low outputs (O0–O7). The ’FCT138T devices feature three enable inputs: two active low (E1, E2) and one active high (E3). All outputs are high unless E1 and E2 are low and E3 is high. This multiple-enable function allows easy parallel expansion of the device to a 1-of-32 (five lines to 32 lines) decoder with just four ’FCT138T devices and one inverter. These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. PIN DESCRIPTION NAME DESCRIPTION A Address inputs E1, E2 Enable inputs (active low) E3 Enable input (active high) O Outputs Copyright 2001, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 A0 A1 A2 E1 E2 E3 O7 GND VCC O0 O1 O2 O3 O4 O5 O6 CY54FCT138T ...D PACKAGE CY74FCT138T ...Q OR SO PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 O1 O2 NC O3 O4 A2 E1 NC E2 E3 CY54FCT138T . . . L PACKAGE (TOP VIEW) NC – No internal connection On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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