MC74LCX373 Low-Voltage CMOS Octal Transparent Latch With 5 VTolerant Inputs and Outputs (3State, NonInverting) www.onsemi.com The MC74LCX373 is a high performance, noninverting octal transparent latch operating from a 2.3 to 3.6 V supply. High MARKING impedance TTL compatible inputs significantly reduce current DIAGRAMS loading to input drivers while TTL compatible outputs offer improved switching noise performance. A V specification of 5.5 V allows I 20 MC74LCX373 inputs to be safely driven from 5 V devices. SOIC20 WB 20 LCX373 The MC74LCX373 contains 8 Dtype latches with 3state outputs. DW SUFFIX AWLYYWWG When the Latch Enable (LE) input is HIGH, data on the Dn inputs CASE 751D 1 enters the latches. In this condition, the latches are transparent, i.e., 1 a latch output will change state each time its D input changes. When LE is LOW, the latches store the information that was present on the D 20 inputs a setup time preceding the HIGHtoLOW transition of LE. The 3state standard outputs are controlled by the Output Enable (OE) LCX TSSOP20 373 input. When OE is LOW, the standard outputs are enabled. When OE 20 DT SUFFIX ALYW is HIGH, the standard outputs are in the high impedance state, but this CASE 948E 1 does not interfere with new data entering into the latches. 1 Features LCX373 = Specific Device Code Designed for 2.3 to 3.6 V V Operation CC A = Assembly Location 5 V Tolerant Interface Capability With 5 V TTL Logic L, WL = Wafer Lot Y, YY = Year Supports Live Insertion and Withdrawal W, WW = Work Week G or = PbFree Package I Specification Guarantees High Impedance When V = 0 V OFF CC (Note: Microdot may be in either location) LVTTL Compatible LVCMOS Compatible 24 mA Balanced Output Sink and Source Capability ORDERING INFORMATION See detailed ordering and shipping information in the package Near Zero Static Supply Current in all Three Logic States (10 A) dimensions section on page 6 of this data sheet. Substantially Reduces System Power Requirements Latchup Performance Exceeds 500 mA ESD Performance: Human Body Model >2000 V Machine Model >200 V NLV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements AECQ100 Qualified and PPAP Capable These Devices are PbFree, Halogen Free/BFR Free and are RoHS Compliant Semiconductor Components Industries, LLC, 2013 1 Publication Order Number: June, 2017 Rev. 14 MC74LCX373/DMC74LCX373 1 OE 11 LE V O7 D7 D6 O6 O5 D5 D4 O4 LE 2 CC LE 3 O0 Q 20 19 18 17 16 15 14 13 12 11 D0 D 5 LE 4 O1 Q D1 D 6 1 2 3 4 567 9 LE 8 10 7 O2 Q D2 D OE O0 D0 D1 O1 O2 D2 D3 O3 GND Figure 1. Pinout (Top View) 9 LE 8 O3 Q D3 D 12 LE 13 O4 Q D4 D PIN NAMES PINS FUNCTION 15 LE OE Output Enable Input 14 O5 Q D5 D LE Latch Enable Input D0D7 Data Inputs 16 LE O0O7 3State Latch Outputs 17 O6 Q D6 D 19 LE O7 18 Q D7 D Figure 2. Logic Diagram TRUTH TABLE INPUTS OUTPUTS OE LE Dn On OPERATING MODE L H H H Transparent (Latch Disabled) Read Latch L H L L L L h H Latched (Latch Enabled) Read Latch L L l L L L X NC Hold Read Latch H L X Z Hold Disabled Outputs H H H Z Transparent (Latch Disabled) Disabled Outputs H H L Z H L h Z Latched (Latch Enabled) Disabled Outputs H L l Z H = High Voltage Level h = High Voltage Level One Setup Time Prior to the Latch Enable HightoLow Transition L = Low Voltage Level l = Low Voltage Level One Setup Time Prior to the Latch Enable HightoLow Transition NC = No Change, State Prior to the Latch Enable HightoLow Transition X = High or Low Voltage Level or Transitions are Acceptable Z = High Impedance State For I Reasons DO NOT FLOAT Inputs CC www.onsemi.com 2