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Details, datasheet, quote on part number:SN74ACT244MDWREP
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Datasheet text preview:
SN74ACT244 EP OCTAL BUFFER/DRIVER WITH 3 STATE OUTPUTS
SCAS724 - OCTOBER 2003
D Controlled Baseline D D D D D
- One Assembly/Test Site, One Fabrication Site Extended Temperature Performance of -40°C to 125°C Enhanced Diminishing Manufacturing Sources (DMS) Support Enhanced Product-Change Notification Qualification Pedigree 4.5-V to 5.5-V VCC Operation
D Inputs Accept Voltages to 5.5 V D Max tpd of 9.5 ns at 5 V D Inputs Are TTL Compatible
DW PACKAGE (TOP VIEW)
Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.
1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1
description/ordering information
The SN74ACT244 octal buffer/driver is designed specifically to improve the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The device is organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low, the device passes noninverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. ORDERING INFORMATION
TA PACKAGE ORDERABLE PART NUMBER TOP-SIDE MARKING
-55°C to 125°C SOIC - DW Tape and reel SN74ACT244MDWREP SACT244MEP Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. FUNCTION TABLE (each buffer) INPUTS OE L L H A H L X OUTPUT Y H L Z
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.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
Copyright 2003, Texas Instruments Incorporated
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· DALLAS, TEXAS 75265
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SCAS724 - OCTOBER 2003
SN74ACT244 EP OCTAL BUFFER/DRIVER WITH 3 STATE OUTPUTS
logic diagram (positive logic)
1OE 1 2OE 19
1A1
2
18
1Y1
2A1
11
9
2Y1
1A2
4
16
1Y2
2A2
13
7
2Y2
1A3
6
14
1Y3
2A3
15
5
2Y3
1A4
8
12
1Y4
2A4
17
3
2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC + 0.5 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC + 0.5 V Input clamp current, IIK (VI VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mA Package thermal impedance, JA (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W Storage temperature range, Tstg (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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. 3. Long-term high-temperature storage and/or extended use at maximum recommended operating conditions may result in a reduction of overall device life. See http://www.ti.com/ep_quality for additional information on enhanced plastic packaging.
recommended operating conditions (see Note 4)
MIN VCC VIH VIL VI VO IOH IOL t/v Supply voltage High-level input voltage Low-level input voltage Input voltage Output voltage High-level output current Low-level output current Input transition rise or fall rate 0 0 4.5 2 0.8 VCC VCC -24 24 8 MAX 5.5 UNIT V V V V V mA mA ns/V
TA Operating free-air temperature -55 125 °C NOTE 4: 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.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN74ACT244 EP OCTAL BUFFER/DRIVER WITH 3 STATE OUTPUTS
SCAS724 - OCTOBER 2003
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER IOH = -50 µA A VOH IOH = -24 mA IOL = 50 µA A VOL IOL = 24 mA IOZ II ICC ICC Ci Co VO = VCC or GND VI = VCC or GND VI = VCC or GND, One input at 3.4 V, VI = VCC or GND VI = VCC or GND IO = 0 Other inputs at GND or VCC TEST CONDITIONS VCC 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5V 5V 0.6 2.5 8 MIN 4.4 5.4 3.86 4.86 0.001 0.001 0.1 0.1 0.36 0.36 ±0.25 ±0.1 4 TA = 25°C TYP MAX 4.49 5.49 MIN 4.4 5.4 3.7 4.7 0.1 0.1 0.5 0.5 ±5 ±1 80 1.6 µA µA µA mA pF pF V V MAX UNIT
This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.
switching characteristics over recommended operating VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ FROM (INPUT) A OE OE TO (OUTPUT) Y Y Y
free-air
temperature
MIN 1 1 1 1 1 1 MAX 10 10 9.5 11 11 11.5
range,
UNIT ns ns ns
MIN 2 2 1.5 2 2 2.5
TA = 25°C TYP MAX 6.5 7 7 7 8 7.5 9 9 8.5 9.5 9.5 10
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER Cpd Power dissipation capacitance per buffer/driver TEST CONDITIONS CL = 50 pF, f = 1 MHz TYP 45 UNIT pF
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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