SN74LVC2G74DCUR

SN74LVC2G74DCUR

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    VSSOP-8

  • 描述:

    IC FF D-TYPE SNGL 1BIT 8VSSOP

  • 数据手册
  • 价格&库存
SN74LVC2G74DCUR 数据手册
Product Folder Sample & Buy Support & Community Tools & Software Technical Documents SN74LVC2G74 SCES203P – APRIL 1999 – REVISED JULY 2016 SN74LVC2G74 Single Positive-Edge-Triggered D-Type Flip-Flop With Clear and Preset 1 Features 3 Description • This single positive-edge-triggered D-type flip-flop is designed for 1.65-V to 5.5-V VCC operation. 1 • • • • • • • • • • Available in the Texas Instruments NanoFree™ Package Supports 5-V VCC Operation Inputs Accept Voltages to 5.5 V Max tpd of 5.9 ns at 3.3 V Low Power Consumption, 10-μA Max ICC ±24-mA Output Drive at 3.3 V Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25°C Typical VOHV (Output VOH Undershoot) > 2 V at VCC = 3.3 V, TA = 25°C Ioff Supports Live Insertion, Partial-Power-Down Mode, and Back-Drive Protection Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II ESD Protection Exceeds JESD 22 – 2000-V Human-Body Model – 200-V Machine Model – 1000-V Charged-Device Model NanoFree™ package technology is a major breakthrough in IC packaging concepts, using the die as the package. A low level at the preset (PRE) or clear (CLR) input sets or resets the outputs, regardless of the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup time requirements is transferred to the outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a voltage level and is not related directly to the rise time of the clock pulse. Following the hold-time interval, data at the D input can be changed without affecting the levels at the outputs. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. Device Information(1) PART NUMBER 2 Applications • • • • • • SN74LVC2G74 Servers LED displays Network switch Telecom infrastructure Motor drivers I/O Expanders PACKAGE BODY SIZE SM8 (8) 2.95 mm × 2.80 mm VSSOP (8) 2.30 mm × 2.00 mm DSBGA (8) 1.91 mm × 0.91 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Schematic PRE D Q CLK Q CLR 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. SN74LVC2G74 SCES203P – APRIL 1999 – REVISED JULY 2016 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 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 6.7 6.8 6.9 6.10 6.11 4 4 5 5 6 6 6 7 7 7 7 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Timing Requirements, –40°C to +85°C..................... Timing Requirements, –40°C to +125°C................... Switching Characteristics, –40°C to +85°C............... Switching Characteristics, –40°C to +125°C............. Operating Characteristics........................................ Typical Characteristics ............................................ Parameter Measurement Information .................. 8 Detailed Description .............................................. 9 8.1 8.2 8.3 8.4 9 Overview ................................................................... Functional Block Diagram ......................................... Feature Description................................................... Device Functional Modes.......................................... 9 9 9 9 Application and Implementation ........................ 10 9.1 Application Information .......................................... 10 9.2 Typical Power Button Circuit .................................. 10 10 Power Supply Recommendations ..................... 11 11 Layout................................................................... 12 11.1 Layout Guidelines ................................................. 12 11.2 Layout Example .................................................... 12 12 Device and Documentation Support ................. 13 12.1 12.2 12.3 12.4 12.5 Receiving Notification of Documentation Updates Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 13 13 13 13 13 13 Mechanical, Packaging, and Orderable Information ........................................................... 13 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision O (January 2015) to Revision P Page • Changed SSOP to SM8 in Device Information table.............................................................................................................. 1 • Updated pinout images to new format.................................................................................................................................... 3 • Added pin number for DSBGA package in Pin Functions table ............................................................................................. 3 • Changed 6 PINS to 8 PINS in Thermal Information table ...................................................................................................... 5 • Changed 23 to 2.3 for tsu data in Timing Requirements, –40°C to +125°C ........................................................................... 6 • Added Receiving Notification of Documentation Updates section and Community Resources section .............................. 13 Changes from Revision N (July 2013) to Revision O • Page Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table, Typical Characteristics, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1 Changes from Revision M (February 2007) to Revision N Page • Changed Ioff description in Features....................................................................................................................................... 1 • Added parameter values for –40 to +125°C temperature ratings in Electrical Characteristics table. .................................... 6 • Changed Timing Requirements, –40°C to +85°C table.......................................................................................................... 6 • Added Timing Requirements, –40°C to +125°C table............................................................................................................ 6 • Changed Switching Characteristics, –40°C to +85°C table.................................................................................................... 7 • Added Switching Characteristics, –40°C to +125°C table...................................................................................................... 7 2 Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 SN74LVC2G74 www.ti.com SCES203P – APRIL 1999 – REVISED JULY 2016 5 Pin Configuration and Functions DCT Package 8-Pin SM8 Top View DCU Package 8-Pin VSSOP Top View CLK 1 8 VCC D 2 7 PRE Q 3 6 CLR GND 4 5 Q CLK 1 8 VCC D 2 7 PRE Q 3 6 CLR GND 4 5 Q Not to scale Not to scale YZP Package 8-Pin DSBGA Bottom View 1 2 D GND Q C Q CLR B D PRE A CLK VCC Not to scale See mecahnical drawings for dimensions. Pin Functions PIN NAME VSSOP, SM8 DSBGA TYPE DESCRIPTION CLK 1 A1 I Clock input CLR 6 C2 I Clear input - Pull low to set Q output low D 2 B1 I Input GND 4 D1 — Ground Q 5 D2 O Output Q 3 C1 O Inverted output PRE 7 B2 I Preset input - Pull low to set Q output high VCC 8 A2 — Supply Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 3 SN74LVC2G74 SCES203P – APRIL 1999 – REVISED JULY 2016 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) VCC MIN MAX Supply voltage –0.5 6.5 UNIT V (2) VI Input voltage –0.5 6.5 V VO Voltage range applied to any output in the high-impedance or power-off state (2) –0.5 6.5 V VO Voltage range applied to any output in the high or low state (2) (3) –0.5 VCC + 0.5 V IIK Input clamp current VI < 0 –50 mA IOK Output clamp current VO < 0 –50 mA IO Continuous output current ±50 mA ±100 mA 150 °C Continuous current through VCC or GND Tstg (1) (2) (3) Storage temperature –65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input negative-voltage and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed. The value of VCC is provided in the Recommended Operating Conditions table. 6.2 ESD Ratings PARAMETER V(ESD) (1) (2) 4 Electrostatic discharge DEFINITION VALUE Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins (1) 2000 Charged device model (CDM), per JEDEC specification JESD22-C101, all pins (2) 1000 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 SN74LVC2G74 www.ti.com SCES203P – APRIL 1999 – REVISED JULY 2016 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) VCC Operating Supply voltage Data retention only High-level input voltage MAX 1.65 5.5 1.7 VCC = 3 V to 3.6 V V 2 0.7 × VCC VCC = 1.65 V to 1.95 V Low-level input voltage V 0.65 × VCC VCC = 2.3 V to 2.7 V VCC = 4.5 V to 5.5 V VIL UNIT 1.5 VCC = 1.65 V to 1.95 V VIH MIN 0.35 × VCC VCC = 2.3 V to 2.7 V 0.7 VCC = 3 V to 3.6 V 0.8 VCC = 4.5 V to 5.5 V V 0.3 × VCC VI Input voltage 0 5.5 V VO Output voltage 0 VCC V IOH High-level output current VCC = 1.65 V –4 VCC = 2.3 V –8 –16 VCC = 3 V VCC = 4.5 V –32 VCC = 1.65 V 4 VCC = 2.3 V IOL Low-level output current Δt/Δv Input transition rise or fall rate TA Operating free-air temperature 8 16 VCC = 3 V mA 24 VCC = 4.5 V 32 VCC = 1.8 V ± 0.15 V, 2.5 V ± 0.2 V 20 VCC = 3.3 V ± 0.3 V 10 VCC = 5 V ± 0.5 V (1) mA –24 ns/V 5 –40 125 °C All unused inputs of the device must be held at VCC or GND to ensure proper device operation. See Implications of Slow or Floating CMOS Inputs, SCBA004. 6.4 Thermal Information SN74LVC2G74 THERMAL METRIC (1) DCT DCU YZP UNIT 102 °C/W 8 PINS RθJA (1) (2) Junction-to-ambient thermal resistance (2) 220 227 For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. The package thermal impedance is calculated in accordance with JESD 51-7. Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 5 SN74LVC2G74 SCES203P – APRIL 1999 – REVISED JULY 2016 www.ti.com 6.5 Electrical Characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VOH 1.65 V to 5.5 V 1.2 IOH = –8 mA 2.3 V 1.9 1.85 2.4 2.4 2.3 2.3 3V UNIT MAX 4.5 V IOL = 100 μA 1.65 V to 5.5 V 0.1 0.1 IOL = 4 mA 1.65 V 0.45 0.45 IOL = 8 mA 2.3 V 0.3 0.3 0.4 0.4 0.55 0.55 0.55 0.55 0 to 5.5 V ±5 ±5 μA IOL = 16 mA 3.8 V IOH = –32 mA 3.8 3V IOL = 32 mA 4.5 V VI = 5.5 V or GND Ioff VI or VO = 5.5 V ICC VI = 5.5 V or GND, ΔICC One input at VCC – 0.6 V, Other inputs at VCC or GND Ci VI = VCC or GND (1) TYP VCC – 0.1 1.2 IOL = 24 mA II VCC – 0.1 MIN 1.65 V IOH = –24 mA Data or control inputs MAX IOH = –4 mA IOH = –16 mA VOL Recommended TYP (1) MIN IOH = –100 μA –40°C to +125°C –40°C to +85°C VCC IO = 0 V 0 ±10 ±10 μA 1.65 V to 5.5 V 10 10 μA 3 V to 5.5 V 500 500 μA 3.3 V 5 5 pF All typical values are at VCC = 3.3 V, TA = 25°C. 6.6 Timing Requirements, –40°C to +85°C over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3) –40°C to +85°C PARAMETER FROM TO VCC = 1.8 V ± 0.15 V MIN VCC = 2.5 V ± 0.2 V MAX fclock MIN MAX 80 tw tsu VCC = 3.3 V ± 0.3 V MIN VCC = 5 V ± 0.5 V MAX 175 MIN 175 MAX 200 CLK 6.2 2.7 2.7 2 PRE or CLR low 6.2 2.7 2.7 2 Data 2.9 1.7 1.3 1.1 PRE or CLR inactive 1.9 1.4 1.2 1 0 0.3 1.2 0.5 th UNIT MHz ns ns ns 6.7 Timing Requirements, –40°C to +125°C over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3) –40°C to +125°C PARAMETER FROM TO VCC = 1.8 V ± 0.15 V MIN fclock tw tsu MAX MIN 80 VCC = 3.3 V ± 0.3 V MAX MIN 120 VCC = 5 V ± 0.5 V MAX MIN 120 6.2 3.5 3.5 3.3 PRE or CLR low 6.2 3.5 3.5 3.3 Data 2.9 2.3 1.9 1.7 PRE or CLR inactive 1.9 2 1.8 1.6 0 0.3 0.5 0.5 Submit Documentation Feedback UNIT MAX 140 CLK th 6 VCC = 2.5 V ± 0.2 V MHz ns ns ns Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 SN74LVC2G74 www.ti.com SCES203P – APRIL 1999 – REVISED JULY 2016 6.8 Switching Characteristics, –40°C to +85°C over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3) –40°C to +85°C PARAMETER FROM VCC = 1.8 V ± 0.15 V TO MIN fmax VCC = 2.5 V ± 0.2 V MAX MIN 80 Q CLK tpd Q PRE or CLR low Q or Q VCC = 3.3 V ± 0.3 V MAX 175 4.8 13.4 6 4.4 MIN VCC = 5 V ± 0.5 V MAX 175 MIN UNIT MAX 200 MHz 2.2 7.1 2.2 5.9 1.4 4.1 14.4 3 7.7 2.6 6.2 1.6 4.4 12.9 2.3 7 1.7 5.9 1.6 4.1 ns 6.9 Switching Characteristics, –40°C to +125°C over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3) –40°C to +125°C PARAMETER FROM VCC = 1.8 V ± 0.15 V TO MIN fmax VCC = 2.5 V ± 0.2 V MAX MIN 80 Q CLK tpd 4.8 Q PRE or CLR low Q or Q VCC = 3.3 V ± 0.3 V MAX 120 14.4 MIN VCC = 5 V ± 0.5 V MAX 120 MIN UNIT MAX 140 MHz 2.2 8.1 2.2 6.9 1.4 5.1 6 16 3 9.7 2.6 7.2 1.6 5.4 4.4 14.9 2.3 9.5 1.7 7.9 1.6 6.1 ns 6.10 Operating Characteristics TA = 25°C PARAMETER Cpd TEST CONDITIONS Power dissipation capacitance f = 10 MHz VCC = 1.8 V VCC = 2.5 V VCC = 3.3 V VCC = 5 V TYP TYP TYP TYP 35 35 37 40 UNIT pF 6.11 Typical Characteristics 10 14 12 VCC = 3 V, TA = 25°C tpd – Propagation Delay Time – ns tpd – Propagation Delay Time – ns VCC = 3 V, TA = 25°C One Output Switching 10 8 6 4 One Output Switching 8 6 4 2 2 0 50 100 150 200 250 300 CL – Load Capacitance – pF Figure 1. Propagation Delay (Low to High Transition) vs Load Capacitance 0 50 100 150 200 250 300 CL – Load Capacitance – pF Figure 2. Propagation Delay (High to Low Transition) vs Load Capacitance Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 7 SN74LVC2G74 SCES203P – APRIL 1999 – REVISED JULY 2016 www.ti.com 7 Parameter Measurement Information VLOAD S1 RL From Output Under Test Open TEST GND CL (see Note A) S1 Open VLOAD tPLH/tPHL tPLZ/tPZL tPHZ/tPZH RL GND LOAD CIRCUIT INPUTS VCC 1.8 V ± 0.15 V 2.5 V ± 0.2 V 3.3 V ± 0.3 V 5 V ± 0.5 V VI tr/tf VCC VCC 3V VCC £2 ns £2 ns £2.5 ns £2.5 ns VM VLOAD CL RL VD VCC/2 VCC/2 1.5 V VCC/2 2 × VCC 2 × VCC 6V 2 × VCC 30 pF 30 pF 50 pF 50 pF 1 kW 500 W 500 W 500 W 0.15 V 0.15 V 0.3 V 0.3 V VI Timing Input VM 0V tW tsu VI Input VM VM th VI Data Input VM VM 0V 0V VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VI VM Input VM 0V tPLH VOH Output VM VOL tPHL VM VM 0V Output Waveform 1 S1 at VLOAD (see Note B) tPLH tPLZ VLOAD/2 VM tPZH VOH Output VM tPZL tPHL VM VI Output Control VM VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS Output Waveform 2 S1 at GND (see Note B) VOL + VD VOL tPHZ VM VOH – VD VOH »0 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR £ 10 MHz, ZO = 50 W. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. H. All parameters and waveforms are not applicable to all devices. Figure 3. Load Circuit and Voltage Waveforms 8 Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 SN74LVC2G74 www.ti.com SCES203P – APRIL 1999 – REVISED JULY 2016 8 Detailed Description 8.1 Overview This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. 8.2 Functional Block Diagram PRE CLK 7 1 C C C 5 Q TG C C C C D 2 TG TG TG 3 C CLR Q C C 6 8.3 Feature Description • • • Allows down voltage translation – 5 V to 3.3 V – 5 V or 3.3 V to 1.8V Inputs accept voltage levels up to 5.5 V Ioff Feature – Can prevent backflow current that can damage device when powered down. 8.4 Device Functional Modes Table 1 shows the functional modes of SN74LVC2G74. Table 1. Function Table INPUTS (1) OUTPUTS PRE CLR CLK D Q Q L H X X H L H L X X L H L L X X H (1) H (1) H H ↑ H H L H H ↑ L L H H H L X Q0 Q0 This configuration is non-stable; that is, it does not persist when PRE or CLR returns to its inactive (high) level. Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 9 SN74LVC2G74 SCES203P – APRIL 1999 – REVISED JULY 2016 www.ti.com 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 A low level at the preset (PRE) or clear (CLR) input sets or resets the outputs, regardless of the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup time requirements is transferred to the outputs on the positive-going edge of the clock pulse. Clock triggering occurs at a voltage level and is not related directly to the rise time of the clock pulse. Following the hold-time interval, data at the D input can be changed without affecting the levels at the outputs. The resistor and capacitor at the CLR pin are optional. If they are not used, the CLR pin should be connected directly to VCC to be inactive. 9.2 Typical Power Button Circuit 3V 3V 3V NC A GND VCC Y SN74LVC1G17 CLK D Q GND VCC PRE CLR Q MCU SN74LVC2G74 Figure 4. Device Power Button Circuit 9.2.1 Design Requirements This device uses CMOS technology and has balanced output drive. Care should be taken to avoid bus contention because it can drive currents that would exceed maximum limits. Outputs can be combined to produce higher drive but the high drive will also create faster 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: – For rise time and fall time specifications, see (Δt/ΔV) in Recommended Operating Conditions table. – For specified high and low levels, see (VIH and VIL) in Recommended Operating Conditions table. – Inputs are overvoltage tolerant allowing them to go as high as 5.5 V at any valid VCC 2. Recommend Output Conditions: – Load currents should not exceed 50 mA per output and 100 mA total for the part. – Series resistors on the output may be used if the user desires to slow the output edge signal or limit the output current. 10 Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 SN74LVC2G74 www.ti.com SCES203P – APRIL 1999 – REVISED JULY 2016 Typical Power Button Circuit (continued) 9.2.3 Application Curves 60 40 100 TA = 25°C, VCC = 3 V, VIH = 3 V, VIL = 0 V, All Outputs Switching 80 TA = 25°C, VCC = 3 V, VIH = 3 V, VIL = 0 V, All Outputs Switching 20 I OL – mA I OH – mA 60 0 –20 –40 40 20 –60 0 –80 –100 –1 –0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 –20 –0.2 0.0 VOH – V Figure 5. Output Current Drive vs HIGH-Level Output Voltage 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 VOL – V Figure 6. Output Current Drive vs LOW-Level Output Voltage 10 Power Supply Recommendations The power supply can be any voltage between the minimum and maximum supply voltage rating located in the Recommended Operating Conditions table. Each VCC terminal 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 terminals then .01-μF or .022-μF capacitors are recommended for each power terminal. It is acceptable to parallel multiple bypass caps to reject different frequencies of noise. The 0.1-μF and 1-μF capacitors are commonly used in parallel. The bypass capacitor should be installed as close to the power terminal as possible for best results. Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 11 SN74LVC2G74 SCES203P – APRIL 1999 – REVISED JULY 2016 www.ti.com 11 Layout 11.1 Layout Guidelines When using multiple bit logic devices, inputs should not float. In many cases, functions or parts of functions of digital logic devices are unused. Some examples are when only two inputs of a triple-input AND gate are used, or when 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. Specified in Figure 7 are 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 should be applied to any particular unused input depends on the function of the device. Generally they will be tied to GND or VCC, whichever makes more sense or is more convenient. It is acceptable to float outputs unless the part is a transceiver. If the transceiver has an output enable pin, it will disable the outputs section of the part when asserted. This will not disable the input section of the I/Os so they also cannot float when disabled. 11.2 Layout Example Vcc Unused Input Input Output Unused Input Output Input Figure 7. Layout Diagram 12 Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 SN74LVC2G74 www.ti.com SCES203P – APRIL 1999 – REVISED JULY 2016 12 Device and Documentation Support 12.1 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed. For change details, review the revision history included in any revised document. 12.2 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. 12.3 Trademarks NanoFree, E2E are trademarks of Texas Instruments. All other trademarks are the property of their respective owners. 12.4 Electrostatic Discharge Caution This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. 12.5 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. Submit Documentation Feedback Copyright © 1999–2016, Texas Instruments Incorporated Product Folder Links: SN74LVC2G74 13 PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2018 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) SN74LVC2G74DCT3 ACTIVE SM8 DCT 8 3000 Pb-Free (RoHS) CU SNBI Level-1-260C-UNLIM -40 to 125 C74 Z SN74LVC2G74DCTR ACTIVE SM8 DCT 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 C74 Z SN74LVC2G74DCTRE4 ACTIVE SM8 DCT 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 C74 Z SN74LVC2G74DCTRE6 ACTIVE SM8 DCT 8 3000 Pb-Free (RoHS) CU SNBI Level-1-260C-UNLIM -40 to 125 C74 Z SN74LVC2G74DCTRG4 ACTIVE SM8 DCT 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 C74 Z SN74LVC2G74DCUR ACTIVE VSSOP DCU 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 125 (74, C74Q, C74R) CZ SN74LVC2G74DCURE4 ACTIVE VSSOP DCU 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 C74R SN74LVC2G74DCURG4 ACTIVE VSSOP DCU 8 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 C74R SN74LVC2G74DCUT ACTIVE VSSOP DCU 8 250 Green (RoHS & no Sb/Br) CU NIPDAU | CU SN Level-1-260C-UNLIM -40 to 125 (C74Q, C74R) SN74LVC2G74DCUTE4 ACTIVE VSSOP DCU 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 C74R SN74LVC2G74DCUTG4 ACTIVE VSSOP DCU 8 250 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM -40 to 125 C74R SN74LVC2G74YZPR ACTIVE DSBGA YZP 8 3000 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM -40 to 85 CPN (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. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 26-Sep-2018 Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
SN74LVC2G74DCUR 价格&库存

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SN74LVC2G74DCUR
  •  国内价格
  • 1+2.77740
  • 10+2.05440
  • 100+1.76090
  • 1000+1.46740

库存:21058

SN74LVC2G74DCUR
    •  国内价格
    • 5+2.22342

    库存:43

    SN74LVC2G74DCUR
    •  国内价格 香港价格
    • 100+2.24910100+0.28850
    • 250+2.19170250+0.28120
    • 1000+2.136601000+0.27410

    库存:1850