HEF40244BP NXP

INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: The IC04 LOCMOS HE4000B Logic Family Specifications HEF, HEC The IC04 LOCMOS HE4000B Logic Package Outlines/Information HEF, HEC HEF40244B buffers Octal buffers with 3-state outputs January 1995 Product specication File under Integrated Circuits, IC04Philips Semiconductors Product specication HEF40244B Octal buffers with 3-state outputs buffers DESCRIPTION The HEF40244B is an octal non-inverting buffer with 3-state outputs. It features output stages with high current output capability suitable for driving highly capacitive loads. The 3-state outputs are controlled by the output enable inputs EO and EO . A HIGH on EO causes the outputs to A B assume a high impedance OFF-state. The device also features hysteresis on all inputs to improve noise immunity. Schmitt-trigger action in the inputs makes the circuit highly tolerant to slower input rise and fall times. The HEF40244B is pin and functionally compatible with the TTL 244 device. Fig.2 Pinning diagram. HEF40244BP(N): 20-lead DIL plastic (SOT146-1) HEF40244BD(F): 20-lead DIL ceramic (cerdip) (SOT152) HEF40244BT(D): 20-lead SO plastic (SOT163-1) ( ): Package Designator North America PINNING I to I inputs A1 A4 I to I inputs B1 B4 O to O bus outputs A1 A4 O to O bus outputs B1 B4 EO , EO output enable inputs (active LOW) A B FAMILY DATA, I LIMITS category buffers DD See Family Specifications Fig.1 Functional diagram. January 1995 2