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Part: SN74AHC540DB
Category:
Logic
-> Buffers/Inverters
-> 3-State
Description: Octal Buffers/drivers With 3-state Outputs
Company: Texas Instruments, Inc.
Datasheet: Download SN74AHC540DB datasheet File size : 214 kB
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Datasheet text preview:
SN54AHC540, SN74AHC540 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SCLS260H DECEMBER 1995 REVISED JANUARY 2000
D D D D
EPIC TM (Enhanced-Performance Implanted CMOS) Process Operating Range 2-V to 5.5-V VCC Latch-Up Performance Exceeds 250 mA Per JESD 17 Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), Thin Very Small-Outline (DGV), Thin Shrink Small-Outline (PW), and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs
SN54AHC540 . . . J OR W PACKAGE SN74AHC540 . . . DB, DGV, DW, N, OR PW PACKAGE (TOP VIEW)
OE1 A1 A2 A3 A4 A5 A6 A7 A8 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC OE2 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8
description
The 'AHC540 octal buffers/drivers are ideal for driving bus lines or buffer memory address registers. These devices feature inputs and outputs on opposite sides of the package to facilitate printed circuit board layout. The 3-state control gate is a two-input AND gate with active-low inputs so that if either output-enable (OE1 or OE2) input is high, all corresponding outputs are in the high-impedance state. The outputs provide inverted data when they are not 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.
SN54AHC540 . . . FK PACKAGE (TOP VIEW)
A2 A1 OE1 VCC
A3 A4 A5 A6 A7
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
OE2 Y1 Y2 Y3 Y4 Y5
The SN54AHC540 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74AHC540 is characterized for operation from 40°C to 85°C.
FUNCTION TABLE (each buffer/driver) INPUTS OE1 L L H X OE2 L L X H A L H X X OUTPUT Y H L Z 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. EPIC is a trademark of Texas Instruments Incorporated.
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 © 2000, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
A8 GND Y8 Y7 Y6
1
SN54AHC540, SN74AHC540 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SCLS260H DECEMBER 1995 REVISED JANUARY 2000
logic symbol
OE1 OE2 A1 A2 A3 A4 A5 A6 A7 A8 1 19 2 3 4 5 6 7 8 9 & EN 18 17 16 15 14 13 12 11
1
Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
OE1 OE2 1 19
A1
2
18
Y1
To Seven Other Channels
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 7 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VCC + 0.5 V Input clamp current, IIK (VI VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±75 mA Package thermal impedance, JA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70°C/W DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92°C/W DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83°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.
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54AHC540, SN74AHC540 OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS
SCLS260H DECEMBER 1995 REVISED JANUARY 2000
recommended operating conditions (see Note 3)
SN54AHC540 MIN VCC VIH Supply voltage High-level input voltage VCC = 2 V VCC = 3 V VCC = 5.5 V VCC = 2 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage High-level output current VCC = 2 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 2 V IOL Low-level output current VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 3 V VCC = 5.5 V 0 0 2 1.5 2.1 3.85 0.5 0.9 1.65 5.5 VCC 50 4 8 50 4 8 100 20 0 0 MAX 5.5 SN74AHC540 MIN 2 1.5 2.1 3.85 0.5 0.9 1.65 5.5 VCC 50 4 8 50 4 8 100 20 V V V V MAX 5.5 UNIT V
mA
mA
mA
mA ns/V
t/v
Input transition rise or fall rate transition rise or fall rate
TA Operating free-air temperature 55 125 40 85 °C 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 CONDITIONS VCC 2V IOH = 50 mA VOH IOH = 4 mA IOH = 8 mA IOL = 50 mA VOL IOL = 4 mA II IOZ ICC Ci Co IOL = 8 mA VI = VCC or GND VO = VCC or GND, VI (OE) = VIL or VIH VI = VCC or GND, VI = VCC or GND IO = 0 3V 4.5 V 3V 4.5 V 2V 3V 4.5 V 3V 4.5 V 0 V to 5.5 V 5.5 V 5.5 V 5V 2 MIN 1.9 2.9 4.4 2.58 3.94 0.1 0.1 0.1 0.36 0.36 ±0.1 ±0.25 4 10 TA = 25°C TYP MAX 2 3 4.5 SN54AHC540 MIN 1.9 2.9 4.4 2.48 3.8 0.1 0.1 0.1 0.5 0.5 ±1* ±2.5 40 MAX SN74AHC540 MIN 1.9 2.9 4.4 2.48 3.8 0.1 0.1 0.1 0.44 0.44 ±1 ±2.5 40 10 V V MAX UNIT
mA mA mA
pF pF
VO = VCC or GND 5V 4 * On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V. For I/O pins, the parameter IOZ includes the input leakage current.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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