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SN74LS294N

SN74LS294N

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    PDIP16

  • 描述:

    IC PROG FREQ DIV/TIMER 16-DIP

  • 数据手册
  • 价格&库存
SN74LS294N 数据手册
Sample & Buy Product Folder Support & Community Tools & Software Technical Documents SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 SN74LS29x Programmable Frequency Dividers and Digital Timers 1 Features 3 Description • • The SN74LS29x devices are programmable frequency dividers and digital timers contain 31 flipflops plus 30 gates (in SN74LS292) or 15 flip-flops plus 29 gates (in SN74LS294) on a single chip. The count modulo is under digital control of the inputs provided. 1 • • Count Divider Chain Digitally Programmable from 22 to 2n (n = 31 for SN74LS292 , n = 15 for SN74LS294) Useable Frequency Range from DC to 30 MHz Easily Expandable Both types feature an active-low CLR clear input to initialize the state of all flip-flops. To facilitate the incoming inspection, test points are provided (TP1, TP2, and TP3 on the SN74LS292, and TP on the SN74LS294). These test points are not intended to drive system loads. Both types feature two clock inputs; either one may be used for clock gating (see Table 1). 2 Applications • • Frequency Division Digital Timing A brief look at the digital timing capabilities of the SN74LS292 shows that with a 1-MHz input frequency, programming for 210 gives a period of 1.024 ms, 220 gives a period of 1.05 sec, 226 gives a period of 1.12 min, and 231 gives a period of 35.79 min. These devices are easily cascadable, giving limitless possibilities to achievable timing delays. Device Information(1) PART NUMBER PACKAGE SN74LS292N PDIP (16) SN74LS294N BODY SIZE (NOM) 6.35 mm × 19.30 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Logic Symbols 'LS292 CLR CLK1 CLK2 11 é fi ù ê nú ë2 û R 1 4 5 3 n=0 fi 6 13 n=1 A B C D E 10 1 TP2 TP3 0 0 éënùû 31 15 14 2 TP1 4 é fi ù ê fo n ú ë 2 û 7 Q 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 www.ti.com Table of Contents 1 2 3 4 5 6 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 4 6.1 6.2 6.3 6.4 6.5 6.6 4 4 5 5 5 6 Absolute Maximum Ratings ...................................... Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Switching Characteristics .......................................... Typical Characteristics .............................................. 7 Parameter Measurement Information .................. 7 8 Detailed Description ............................................ 10 7.1 Logic Diagrams ......................................................... 7 8.1 Overview ................................................................. 10 8.2 Functional Block Diagram ....................................... 10 8.3 Feature Description................................................. 10 8.4 Device Functional Modes........................................ 10 9 Application and Implementation ........................ 13 9.1 Application Information............................................ 13 9.2 Typical Application ................................................. 13 10 Power Supply Recommendations ..................... 14 11 Layout................................................................... 14 11.1 Layout Guidelines ................................................. 14 11.2 Layout Example .................................................... 14 12 Device and Documentation Support ................. 15 12.1 12.2 12.3 12.4 12.5 12.6 Documentation Support ....................................... Related Links ........................................................ Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 15 15 15 15 15 15 13 Mechanical, Packaging, and Orderable Information ........................................................... 15 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Original (January 1981) to Revision A Page • Removed SN54LS292 and SN54LS294 from the data sheet ................................................................................................ 1 • Added ESD Ratings and Thermal Information tables, Feature Description section, Device Functional Modes section, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. .................................... 1 2 Submit Documentation Feedback Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 SN74LS292, SN74LS294 www.ti.com SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 5 Pin Configuration and Functions SN74LS29x J, W, or N Package 16-Pin PDIP Top View B E TP 1 CLK 1 CLK 2 TP 2 Q 1 16 2 15 GND 8 3 4 5 6 7 VCC C 14 D 13 TP 3 12 NC 11 CLR 10 A 9 NC Pin Functions, SN74LS292 PIN NAME PDIP I/O DESCRIPTION A 10 I Programming input A B 1 I Programming input B C 15 I Programming input C CLK1 4 I Clock 1 input CLK2 5 I Clock 2 input CLR 11 I Active-low clear input D 14 I Programming input D E 2 I Programming input E GND 8 - Ground 9, 12 - No connect Q 7 O Q Output TP — O Test Point TP1 3 O Test Point TP2 6 O Test Point TP3 13 O Test Point VCC 16 - Power NC Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 Submit Documentation Feedback 3 SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 www.ti.com Pin Functions, SN74LS294 PIN NAME I/O PDIP DESCRIPTION A 2 I Programming input A B 1 I Programming input B C 15 I Programming input C CLK1 4 I Clock 1 input CLK2 5 I Clock 2 input CLR 11 I Active-low clear input D 14 I Programming input D E — I Programming input E GND 8 - Ground 6, 9 ,10, 12, 13 - No connect Q 7 O Q Output TP 3 O Test Point TP1 — O Test Point TP2 — O Test Point TP3 — O Test Point VCC 16 - Power NC 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN VCC (2) MAX UNIT Supply voltage 7 V Input voltage 7 V 150 °C 150 °C TJ Junction temperature Tstg Storage temperature (1) (2) –65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Voltage values are with respect to network ground terminal. 6.2 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN NOM MAX UNIT 4.75 5 5.25 V VCC Supply voltage VIH High-level input voltage VIL Low-level input voltage IOH High-level output current (Q only) IOL Low-level output current (Q only) fclock Clock frequency tw Duration of clock input pulse tw Duration of clear pulse tsu Clear inactive-state set-up time 15 TA Operating free-air temperature 0 4 Submit Documentation Feedback 2 0 V 0.8 V –1.2 mA 24 mA 30 MHz 16 SN74LS292 55 SN74LS294 35 ns ns ns 70 °C Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 SN74LS292, SN74LS294 www.ti.com SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 6.3 Thermal Information SN74LS292 THERMAL METRIC (1) N (PDIP) UNIT 16 PINS RθJA Junction-to-ambient thermal resistance 36.8 °C/W RθJC(top) Junction-to-case (top) thermal resistance 22.2 °C/W RθJB Junction-to-board thermal resistance 17.0 °C/W ψJT Junction-to-top characterization parameter 7.0 °C/W ψJB Junction-to-board characterization parameter 16.8 °C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953. 6.4 Electrical Characteristics over operating free-air temperature range (unless otherwise noted) TEST CONDITIONS (1) PARAMETER VIK MIN TYP (2) VCC = MIN, II = –18 mA VOH Q Q VOL VCC = MIN, VIH = 2 V, IOH = –1.2 mA, VIL = MAX VCC = MIN, VIH = 2 V, VIL = MAX TP (3) 2.4 MAX UNIT –1.5 V 3.4 V IOL = 12 mA 0.25 0.4 IOL = 24 mA 0.35 0.5 IOL = 0.5 mA 0.25 0.4 V II VCC = MAX, VI = 7 V 0.1 mA IIH VCC = MAX, VI = 2.7 V 20 mA CLK1, CLK2 VCC = MAX, VI = 0.4 V –0.8 All others VCC = MAX, VI = 0.4 V –0.4 Q VCC = MAX SN74LS292 VCC = MAX, all inputs grounded, all outputs open 40 75 SN74LS294 VCC = MAX, all inputs grounded, all outputs open 30 50 IIL IOS (4) ICC (1) (2) (3) (4) –30 –130 mA mA mA For conditions shown as MIN or MAX, use the appropriate value specified under Recommended Operating Conditions. All typical values are at VCC = 5 V, TA = 25°C. The TP output or outputs are not intended to drive external loads, but are solely provided for test points. The duration of the short-circuit should not exceed one second. 6.5 Switching Characteristics VCC = 5 V, TA = 25°C, RL = 667 Ω, CL = 45 pF (see Figure 1) PARAMETER fmax TEST CONDITIONS From CLK1 or 2 MIN TYP 30 50 MAX UNIT MHz 2 tPLH From CLK1 or 2, to Q; Modulo set at 2 , A through # = LLLHL (xxxxLS292), A through D = LLHL (xxxxLS294) 55 90 80 120 SN74LS292 85 130 SN74LS294 35 65 ns 2 From CLK1 or 2, to Q; Modulo set at 2 , A through # = LLLHL (xxxxLS292), A through D = LLHL (xxxxLS294) tPHL From CLR, to Q ns VCC RL= 667W From Output Under Test CL= 45 pF Figure 1. Switching Loads Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 Submit Documentation Feedback 5 SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 www.ti.com CLR CLK1 Q22 Q23 CLK2 Figure 2. Timing Diagram 6.6 Typical Characteristics 0.6 0.5 0.4 VCC @4.75V V OL (typ) V 0.3 0.2 0.1 0 3 6 9 12 15 18 21 24 27 30 I OL (mA) Figure 3. VOL vs IOL 6 Submit Documentation Feedback Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 SN74LS292, SN74LS294 www.ti.com SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 7 Parameter Measurement Information 7.1 Logic Diagrams 'LS292 CLR CLK1 CLK2 11 é fi ù ê nú ë2 û R 1 4 5 3 n=0 fi 6 13 n=1 A B C D E 10 1 TP2 TP3 0 0 éënùû 31 15 14 2 TP1 4 é fi ù ê fo n ú ë 2 û 7 Q These symbols are in accordance with ANSi/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for J, N, and W packages. Figure 4. Logic Symbols Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 Submit Documentation Feedback 7 SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 www.ti.com Logic Diagrams (continued) 'LS292 CLR CLK1 CLK2 11 4 5 R R T T R X/Y T 2D R 2T M2 0 R T 28 26 24 22 A B C D E 3 2D R R 2T M2 T 20 18 16 10 1 2 15 4 14 8 2 16 14 6 2D R R 2T T TP1 TP2 M2 2D R 12 10 8 13 2T TP3 M2 R T 6 4 2 2D R 2T T M2 2D R 2T S 3D 3T 7 Q M2 M3 Pin numbers shown are for J, N, and W packages. Figure 5. Logic Diagram (Positive Logic) SN74LS292 8 Submit Documentation Feedback Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 SN74LS292, SN74LS294 www.ti.com SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 Logic Diagrams (continued) 'LS294 CLR CLK1 CLK2 11 4 R R T T 5 X/Y 2D R 0 2T 1 14 13 M2 12 11 10 9 8 A B C D 2 1 15 14 3 TP1 1 2 4 8 2D R 2T M2 7 6 5 4 3 2 3D S 3T 7 Q M3 Pin numbers shown are for J, N, and W packages. Figure 6. Logic Diagram (Positive Logic) SN74LS294 Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 Submit Documentation Feedback 9 SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 www.ti.com 8 Detailed Description 8.1 Overview Functional Block Diagram shows that the count modulo is controlled by an X/Y decoder connected to the mode control inputs of several flip-flops. These flip-flops with mode controls each have a D input connected to the parallel clock line, and a T input driven by the preceding stage. The parallel clock frequency is always the input frequency divided by four. The X/Y decoder output selected by the programming inputs goes low. While a mode control is slow, the D input of that flip-flop is enabled, and the signal from the parallel clock line (fin ÷ 4) is passed to the T input of the following stage. All the other mode controls are high, enabling the T inputs and causing each flip-flop in turn to divide by two. 8.2 Functional Block Diagram Parallel Clock Active E-Low Clear 2D Output of Preceding Stage From X/Y Coder 2T M2 R To Toggle Input of Next Stage 8.3 Feature Description This SN74LS29x device can be used to digitally program from 22 to 2n (n = 31 for SN74LS292, n = 15 for SN74LS294) divider chain. This has a useable frequency range up to 30 MHz. The flexibility is offered when the devices are cascaded to have desired timing delay. 8.4 Device Functional Modes Table 1, Table 2, and Table 3 list the functional modes of the SN74LS292. Table 1. Function Table 10 CLEAR CLK1 CLK2 Q OUTPUT MODE L X X Cleared to L H ↑ L Count H L ↑ Count H H X Inhibit H X H Inhibit Submit Documentation Feedback Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 SN74LS292, SN74LS294 www.ti.com SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 Table 2. SN74LS292 Function Table FREQUENCY DIVISION PROGRAMMING INPUTS Q TP1 TP2 TP3 E D C B A BINARY DECIMAL BINARY DECIMAL BINARY DECIMAL BINARY DECIMAL L L L L L Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit L L L L H Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit Inhibit 2 9 17 24 L L L H L 2 4 2 512 2 131072 2 16777216 L L L H H 23 8 29 512 217 131072 224 16777216 L L H L L 24 16 29 512 217 131072 224 16777216 5 9 17 24 L L H L H 2 32 2 512 2 131072 2 16777216 L L H H L 26 64 29 512 217 131072 224 16777216 L L H H H 27 128 29 512 217 131072 224 16777216 L H L L L 8 256 9 512 17 131072 2 2 9 2 9 2 17 2 2 4 L H L L H 2 512 2 512 2 131072 2 4 L H L H L 210 1024 29 512 217 131072 24 16 L H L H H 211 2048 29 512 217 131072 24 16 12 9 17 6 64 L H H L L 2 4096 2 512 2 131072 2 L H H L H 213 8192 29 512 217 131072 26 64 L H H H L 214 16384 29 512 Disabled low Disabled low 28 256 L H H H H 215 32768 29 512 Disabled low Disabled low 28 256 L L 16 2 65536 9 2 512 2 8 210 1024 8 210 1024 12 4096 3 H L L H L L L H 217 131072 29 512 23 H L L H L 18 262144 9 512 5 2 19 2 9 2 5 32 2 12 H L L H H 2 524288 2 512 2 32 2 4096 H L H L L 220 1048576 29 512 27 128 214 16384 H L H L H 221 2097152 29 512 27 22 128 214 16384 9 16 65536 H L H H L 2 4194304 Disabled low Disabled low 2 512 2 H L H H H 223 8388608 Disabled low Disabled low 29 512 216 65536 H H L L L 224 16777216 23 8 211 2048 218 262144 H H L L H 225 33554432 23 8 211 2048 218 262144 26 5 13 8192 220 1048576 8192 220 1048576 22 4194304 H H L H L 2 67108864 2 H H H L H H 227 134217728 25 H H L L 28 268435456 7 2 29 2 7 32 2 32 213 128 15 2 15 32768 2 22 H H H L H 2 536870912 2 128 2 32768 2 4194304 H H H H L 230 1073741824 29 512 217 131072 224 16777216 H H H H H 231 2147483648 29 512 217 131072 224 16777216 Submit Documentation Feedback Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 11 SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 www.ti.com Table 3. SN74LS294 Function Table FREQUENCY DIVISION PROGRAMMING INPUTS Q TP D C B A BINARY DECIMAL BINARY DECIMAL L L L L Inhibit Inhibit Inhibit Inhibit L L L H Inhibit Inhibit Inhibit Inhibit L L H L 22 4 29 512 3 9 L L H H 2 8 2 512 L H L L 24 16 29 512 L H L H 25 32 29 512 6 9 L H H L 2 64 L H H H 27 128 H L L L 28 256 22 4 H L L H 9 512 3 8 4 2 10 512 2 Disabled Low 2 H L H L 2 1024 2 16 H L H H 211 2048 25 32 H H L L 212 4096 26 64 13 7 H H L H 2 8192 2 128 H H H L 214 16384 28 256 H H H H 215 32768 29 512 Figure 7, Figure 9, and Figure 9 show the schematics of inputs and outputs of the SN74LS292. VCC VCC 100 Ω Req INPUT OUTPUT Figure 7. Equivalent of Each Input Figure 8. Typical of Q Outputs OUTPUT Figure 9. Typical of TP Outputs 12 Submit Documentation Feedback Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 SN74LS292, SN74LS294 www.ti.com SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information This device is used for configurable frequency, programmable frequency, and timing division as shown in Typical Application. 9.2 Typical Application 5V 0.1 F VCC CLR A Control B Q 976Hz Phase detector 1024 C D 1MHz TP 16 CLK Oscillator Z>^294 GND Figure 10. Typical application 9.2.1 Design Requirements This device does not have balanced output drive. Take care to avoid bus contention because it can sink currents that would exceed maximum limits. The high drive will also create fast edges into light loads so routing and load conditions should be considered to prevent ringing. 9.2.2 Detailed Design Procedure 1. Recommended Input Conditions: – Rise time and fall time specs. See (Δt/ΔV) in Recommended Operating Conditions. – Specified high and low levels. See (VIH and VIL) in Recommended Operating Conditions. – Inputs can go as high as (VI max) in Recommended Operating Conditions at any valid VCC. 2. Recommended Output Conditions: – Load currents should not exceed (IOH,IOL) per output. These limits are located in the Recommended Operating Conditions. Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 Submit Documentation Feedback 13 SN74LS292, SN74LS294 SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 www.ti.com Typical Application (continued) 9.2.3 Application Curve 0.5 0.4 VCC @ 4.75 V VOL (max) V 0.3 0.2 0.1 0 3 6 9 12 15 18 21 24 27 I OL (mA) Figure 11. VOL vs IOL 10 Power Supply Recommendations The power supply can be any voltage between the minimum and maximum supply voltage rating located in Recommended Operating Conditions. Each VCC pin should have a good bypass capacitor to prevent power disturbance. For devices with a single supply, a 0.1-μF capacitor is recommended and, if there are multiple VCC pins, then a 0.01-μF or 0.022-μF capacitor is recommended for each power pin. It is acceptable to parallel multiple bypass capacitors to reject different frequencies of noise. 0.1-μF and 1-μF capacitors are commonly used in parallel. The bypass capacitor should be installed as close to the power pin as possible for best results. 11 Layout 11.1 Layout Guidelines When using multiple bit logic devices, inputs should not ever float. In many cases, functions or parts of functions of digital logic devices are unused (for example, when only two inputs of a triple-input AND gate are used or only 3 of the 4 buffer gates are used). Such input pins should not be left unconnected because the undefined voltages at the outside connections result in undefined operational states. The following are the rules that must be observed under all circumstances: • All unused inputs of digital logic devices must be connected to a high or low bias to prevent them from floating. • The logic level that must be applied to any particular unused input depends on the function of the device. Generally they are tied to GND or VCC, whichever make more sense or is more convenient. 11.2 Layout Example VCC Unused Input Input Output Output Unused Input Input Figure 12. Generic Layout Best Practices 14 Submit Documentation Feedback Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 SN74LS292, SN74LS294 www.ti.com SDLS153A – JANUARY 1981 – REVISED JANUARY 2016 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 Related Documentation For related documentation, see the following: • Digital Phase-Locked Loop Design Using SN74LS297, SDLA005 • Introduction to Logic, SLVA700 12.2 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 4. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS TOOLS & SOFTWARE SUPPORT & COMMUNITY SN74LS292 Click here Click here Click here Click here Click here SN74LS294 Click here Click here Click here Click here Click here 12.3 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.4 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 12.5 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 12.6 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Copyright © 1981–2016, Texas Instruments Incorporated Product Folder Links: SN74LS292 SN74LS294 Submit Documentation Feedback 15 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) (3) Device Marking (4/5) (6) SN74LS292N ACTIVE PDIP N 16 25 RoHS & Non-Green NIPDAU N / A for Pkg Type 0 to 70 SN74LS292N SN74LS294N ACTIVE PDIP N 16 25 RoHS & Non-Green NIPDAU N / A for Pkg Type 0 to 70 SN74LS294N (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
SN74LS294N 价格&库存

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SN74LS294N
    •  国内价格
    • 1000+122.43000

    库存:3329