SN74HC645NSRG4


    
 

 
  
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002 D Wide Operating Voltage Range of 2 V to 6 V D High-Current 3-State Outputs Can Drive Up D D D D To 15 LSTTL Loads D Low Power Consumption, 80-µA Max ICC Typical tpd = 12 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max True Logic 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 A2 A1 DIR VCC VCC OE B1 B2 B3 B4 B5 B6 B7 B8 A3 A4 A5 A6 A7 4 3 2 1 20 19 18 5 17 6 16 7 15 14 8 B1 B2 B3 B4 B5 9 10 11 12 13 A8 GND B8 B7 B6 DIR A1 A2 A3 A4 A5 A6 A7 A8 GND OE SN54HC645 . . . FK PACKAGE (TOP VIEW) SN54HC645 . . . J OR W PACKAGE SN74HC645 . . . DW, N, OR NS PACKAGE (TOP VIEW) description/ordering information These octal bus transceivers are designed for asynchronous two-way communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated. ORDERING INFORMATION PDIP – N –40°C 40°C to 85°C –55°C to 125°C ORDERABLE PART NUMBER PACKAGE† TA TOP-SIDE MARKING Tube SN74HC645N Tube SN74HC645DW Tape and reel SN74HC645DWR SOP – NS Tape and reel SN74HC645NSR HC645 CDIP – J Tube SNJ54HC645J SNJ54HC645J CFP – W Tube SNJ54HC645W SNJ54HC645W SOIC – DW SN74HC645N HC645 LCCC – FK Tube SNJ54HC645FK SNJ54HC645FK † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE INPUTS OPERATION OE DIR L L B data to A bus L H A data to B bus H X Isolation Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright  2002, Texas Instruments Incorporated     ! " #$%! "  &$'(# ! ) !%* )$#!" # ! "&%## !" &% !+% !%"  %, " "!$%!" "! ) ) -  !.* )$#! &#%""/ )%" ! %#%"" (. #($)% !%"!/  (( &  %!%"*  &)$#!" #&( ! ! 012 (( &  %!%" % !%"!%) $(%"" !+%-"% !%)*  (( !+% &)$#!" &)$#! &#%""/ )%" ! %#%"" (. #($)% !%"!/  (( &  %!%"* POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 

    
 

 
  
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002 logic diagram (positive logic) OE DIR A1 19 1 2 18 B1 To Seven Other Transceivers absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C † 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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions (see Note 3) SN54HC645 VCC Supply voltage VIH High-level High level in input ut voltage VCC = 2 V VCC = 4.5 V VCC = 6 V VCC = 2 V VIL Low-level Low level in input ut voltage MIN NOM MAX MIN NOM MAX 2 5 6 2 5 6 1.5 1.5 3.15 3.15 4.2 4.2 VCC = 4.5 V VCC = 6 V VI VO Input voltage 0 Output voltage 0 ∆t/∆v Input In ut transition rise/fall time VCC = 2 V VCC = 4.5 V VCC = 6 V TA 2 Operating free-air temperature –55 POST OFFICE BOX 655303 SN74HC645 • DALLAS, TEXAS 75265 0.5 0.5 1.35 1.8 1.8 0 0 VCC VCC 1000 1000 500 500 400 400 125 –40 V V 1.35 VCC VCC UNIT 85 V V V ns °C 

    
 

 
  
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002 NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = –20 20 µA VOH VI = VIH or VIL IOH = –6 mA IOH = –7.8 mA IOL = 20 µA VOL VI = VIH or VIL IOL = 6 mA IOL = 7.8 mA II IOZ DIR or OE A or B ICC Ci VI = VCC or 0 VO = VCC or 0 VI = VCC or 0, IO = 0 VCC MIN TA = 25°C TYP MAX MIN MAX SN74HC645 MIN 2V 1.9 1.998 1.9 1.9 4.5 V 4.4 4.499 4.4 4.4 6V 5.9 5.999 5.9 5.9 4.5 V 3.98 4.3 3.7 3.84 6V 5.48 5.8 5.2 MAX UNIT V 5.34 2V 0.002 0.1 0.1 0.1 4.5 V 0.001 0.1 0.1 0.1 6V 0.001 0.1 0.1 0.1 4.5 V 0.17 0.26 0.4 0.33 6V 0.15 0.26 0.4 0.33 6V ±0.1 ±100 ±1000 ±1000 nA 6V ±0.01 ±0.5 ±10 ±5 µA 8 160 80 µA 10 10 10 pF 6V DIR or OE SN54HC645 2 V to 6 V 3 V switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER tpd d ten tdis tt FROM (INPUT) A or B OE OE TA = 25°C MIN TYP MAX SN54HC645 SN74HC645 TO (OUTPUT) VCC 2V 40 105 160 130 B or A 4.5 V 15 21 32 26 6V 12 18 27 22 A or B A or B A or B MIN MAX MIN MAX 2V 125 230 340 290 4.5 V 23 46 68 58 6V 20 39 58 49 2V 74 200 300 250 4.5 V 25 40 60 50 6V 21 34 51 43 2V 20 60 90 75 4.5 V 8 12 18 15 6V 6 10 15 13 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT ns ns ns ns 3 

    
 

 
  
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002 switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 1) TA = 25°C TYP MAX SN54HC645 SN74HC645 PARAMETER FROM (INPUT) TO (OUTPUT) VCC 2V 54 135 200 170 tpd d A or B B or A 4.5 V 18 27 40 34 6V 15 23 34 29 ten tt OE A or B A or B MIN MIN MAX MIN MAX 2V 150 270 405 335 4.5 V 31 54 81 67 6V 25 46 69 56 2V 45 210 315 265 4.5 V 17 42 63 53 6V 13 36 53 45 UNIT ns ns ns operating characteristics, TA = 25°C PARAMETER Cpd 4 TEST CONDITIONS Power dissipation capacitance per transceiver POST OFFICE BOX 655303 No load • DALLAS, TEXAS 75265 TYP 40 UNIT pF 

    
 

 
  
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002 PARAMETER MEASUREMENT INFORMATION VCC PARAMETER Test Point From Output Under Test S1 tPZH ten RL CL (see Note A) 1 kΩ tPZL tPHZ tdis S2 RL tPLZ tpd or tt 1 kΩ –– LOAD CIRCUIT CL S1 S2 50 pF or 150 pF Open Closed Closed Open Open Closed Closed Open Open Open 50 pF 50 pF or 150 pF VCC Input 50% 50% 0V tPLH In-Phase Output 50% 10% tPHL 90% VOH 50% 10% V OL tf 90% tr tPHL Out-of-Phase Output 90% tPLH 50% 10% 50% 10% 90% tf VOH VOL tr VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT TRANSITION TIMES Output Control (Low-Level Enabling) VCC 50% 50% 0V tPZL Output Waveform 1 (See Note B) tPLZ ≈VCC 50% 10% tPZH Input 50% 10% 90% VCC 50% 10% 0 V 90% tr Output Waveform 2 (See Note B) ≈VCC VOL tPHZ 50% 90% VOH ≈0 V tf VOLTAGE WAVEFORM INPUT RISE AND FALL TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS NOTES: A. CL includes probe and test-fixture 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. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. D. The outputs are measured one at a time with one input 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. Figure 1. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 PACKAGE OPTION ADDENDUM www.ti.com 10-Jun-2022 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) Device Marking (3) Samples (4/5) (6) SN54HC645J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SN54HC645J Samples SN74HC645DW ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HC645 Samples SN74HC645DWR ACTIVE SOIC DW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 HC645 Samples SN74HC645N ACTIVE PDIP N 20 20 RoHS & Non-Green NIPDAU N / A for Pkg Type -40 to 85 SN74HC645N Samples SNJ54HC645FK ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54HC 645FK Samples SNJ54HC645J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54HC645J Samples (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