HEF40373BT: Octal transparent latch with 3-state outputs

The HEF40373B is an octal D-type transparent latch with 3-state outputs. The device features latch enable (LE) and output enable (OE) inputs. When LE is HIGH, data at the inputs enter the latches. In this condition the latches are transparent, a latch output will change each time its corresponding D-input changes. When LE is LOW the latches store the information that was present at the inputs a set-up time preceding the HIGH‑to‑LOW transition of LE. A HIGH on OE causes the outputs to assume a high-impedance OFF‑state. Operation of the OE input does not affect the state of the latches.

Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

HEF40373BT: Product Block Diagram
SOT163-1
Data Sheets (1)
Name/DescriptionModified Date
Octal transparent latch with 3-state outputs (REV 1.0) PDF (85.0 kB) HEF40373B_CNV [English]01 Jan 1995
Application Notes (2)
Name/DescriptionModified Date
Pin FMEA HEF4000 family (REV 2.0) PDF (30.0 kB) AN11051 [English]21 Aug 2015
A metastability primer (REV 1.0) PDF (40.0 kB) AN219 [English]13 Mar 2013
Brochures (2)
Name/DescriptionModified Date
電圧レベルシフタ (REV 1.1) PDF (3.1 MB) 75017511_JP [English]16 Feb 2015
Voltage translation: How to manage mixed-voltage designs with NXP® level translators (REV 1.0) PDF (2.6 MB) 75017511 [English]20 May 2014
Package Information (1)
Name/DescriptionModified Date
plastic small outline package; 20 leads; body width 7.5 mm (REV 1.0) PDF (335.0 kB) SOT163-1 [English]08 Feb 2016
Supporting Information (2)
Name/DescriptionModified Date
Reflow Soldering Profile (REV 1.0) PDF (34.0 kB) REFLOW_SOLDERING_PROFILE [English]30 Sep 2013
Wave Soldering Profile (REV 1.0) PDF (20.0 kB) WAVE_SOLDERING_PROFILE [English]30 Sep 2013
Design Support
Ordering Information
ProductStatusFamilyFunctionVCC (V)Logic switching levelsDescriptionPackage versionOutput drive capability (mA)tpd (ns)No of bitsPower dissipation considerationsTamb (Cel)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package nameNo of pins
HEF40373BTActiveHEF4000BLatches/registered drivers4.5 - 15CMOSoctal D-type transparent latch (3-state)SOT163-1-50/+62408medium-40~857618.752SO2020
Package Information
Product IDPackage DescriptionOutline VersionReflow/Wave SolderingPackingProduct StatusPart NumberOrdering code(12NC)MarkingChemical ContentRoHS / Pb Free / RHFLeadFree Conversion DateEFRIFR(FIT)MTBF(hour)MSLMSL LF
HEF40373BTSOT163-1Reflow_Soldering_Profile Wave_Soldering_Profile
Reflow_Soldering_Profile Wave_Soldering_Profile
Reel 13" Q1/T1 CECCActiveHEF40373BT,653 (9336 387 00653)HEF40373BTHEF40373BTweek 30, 200475.32.993.34E811
Bulk Pack, CECCActiveHEF40373BT,652 (9336 387 00652)HEF40373BTHEF40373BTweek 30, 200475.32.993.34E811
Octal transparent latch with 3-state outputs HEF40373BT
Pin FMEA HEF4000 family HEF4894B_Q100
A metastability primer 74AHC573PW
電圧レベルシフタ 74AVC16245DGG-Q100
Voltage translation: How to manage mixed-voltage designs with NXP® level translators 74AVC16245DGG-Q100
HEF/HEC4000B family specification overview HEF40373BT
SOT163-1 LPC1112FD20
Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
Reflow_Soldering_Profile Wave_Soldering_Profile LPC1112FD20
HEF40373B
SA615