HEF4044BP

HEF4044B Quad R/S latch with 3-state outputs Rev. 10 18 November 2011 Product data sheet 1. General description The HEF4044B is a quad R/S latch with 3-state outputs, with a common output enable input (OE). Each latch has an active LOW set input (1S to 4S), an active LOW reset input (1R to 4R) and an active HIGH 3-state output (1Q to 4Q). When OE is HIGH, the latch output (nQ) is determined by the nR and nS inputs as shown in Table 3. When OE is LOW, the latch outputs are in the high impedance OFF-state. OE does not affect the state of the latch. The high impedance off-state feature allows common bussing of the outputs. It operates over a recommended V power supply range of 3 V to 15 V referenced to V DD SS (usually ground). Unused inputs must be connected to V , V , or another input. DD SS 2. Features and benefits Fully static operation 5 V, 10 V, and 15 V parametric ratings Standardized symmetrical output characteristics Specified from 40 C to +85 C Complies with JEDEC standard JESD 13-B 3. Applications Four-bit storage with output enable 4. Ordering information Table 1. Ordering information All types operate from 40 C to +85 C. Type number Package Name Description Version HEF4044BP DIP16 plastic dual in-line package; 16 leads (300 mil) SOT38-4 HEF4044BT SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1HEF4044B NXP Semiconductors Quad R/S latch with 3-state outputs 5. Functional diagram 3 1S 1Q 13 4 1R 7 2S 2Q 9 6 2R nS 3-STATE OUTPUTS 11 3S 3Q 10 12 3R nQ nR 15 4S 4Q 1 14 4R OE 5 OE to other latches 001aae621 001aai542 Fig 1. Functional diagram Fig 2. Logic diagram for one latch 6. Pinning information 6.1 Pinning HEF4044B 4Q 1 16 V DD n.c. 2 15 4S 3 14 1S 4R 1R 4 13 1Q OE 5 12 3R 2R 6 11 3S 2S 7 10 3Q 8 9 V 2Q SS 001aae622 Fig 3. Pin configuration HEF4044B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 10 18 November 2011 2 of 14