Philips 4538 free download

File name 4538.pdf

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 HEF4538B MSI Dual precision monostable multivibrator Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification Dual precision monostable multivibrator DESCRIPTION The HEF4538B is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has an active LOW trigger/retrigger input (I0), an active HIGH trigger/retrigger input (I1), an overriding active LOW direct reset input (CD), an output (O) and its complement (O), and two pins (CTC,(1) RCTC) for connecting the external timing components Ct and Rt. Typical pulse width variation over temperature range is ± 0,2%. The HEF4538B may be triggered by either the positive or the negative edges of the input pulse and will produce an HEF4538B MSI accurate output pulse with a pulse width range of 10 µs to infinity. The duration and accuracy of the output pulse are determined by the external timing components Ct and Rt. The output pulse width (T) is equal to Rt Ч Ct. The linear design techniques in LOCMOS guarantee precise control of the output pulse width. A LOW level at CD terminates the output pulse immediately. Schmitt-trigger action in the trigger inputs makes the circuit highly tolerant to slower rise and fall times. Fig.2 Pinning diagram. HEF4538BP(N): HEF4538BD(F): HEF4538BT(D): 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) (SOT74) 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America PINNING I0A, I0B I1A, I1B CDA, CDB OA, OB OA, OB CTC A, CTC B RCTC A, RCTC B Note 1. Always connected to ground. Fig.1 Functional diagram. FAMILY DATA, IDD LIMITS category MSI See Family specifications. January 1995 2 input (HIGH to LOW triggered) input (LOW to HIGH triggered) direct reset input (active LOW) output complementary output (active LOW) external capacitor connections(1) external capacitor/ resistor connections This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ... January 1995 3 Fig.3 Logic diagram. Philips Semiconductors Dual precision monostable multivibrator HEF4538B MSI Product specification Philips Semiconductors Product specification Dual precision monostable multivibrator FUNCTION TABLE INPUTS I0 H X Notes 1. H = HIGH state (the more positive voltage) L = LOW state (the less positive voltage) X = state is immaterial = positive output pulse = negative output pulse = positive-going transit