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 DM74ALS541 Octal Buffer and Line Driver with 3-STATE Outputs
October 1986 Revised February 2000
DM74ALS541 Octal Buffer and Line Driver with 3-STATE Outputs
General Description
This octal buffer and line driver is designed to have the performance of the DM74ALS240A series and, at the same time, offer a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly enhances circuit board layout. The 3-STATE control gate is a 2-input NOR such that if either G1 or G2 is HIGH, all eight outputs are in the high impedance state.
Features
s Advanced oxide-isolated ion-implanted Schottky TTL process s Switching performance is guaranteed over full temperature and VCC supply range s Data flow-thru pinout (all inputs on opposite side from outputs) s P-N-P Inputs reduce DC loading
Ordering Code:
Order Number DM74ALS541WM DM74ALS541SJ DM74ALS541N Package Number Package Description M20B M20D N20A 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Connection Diagram
Function Table
Input G1 H X L L G2 X H L L A X X L H Output Y Hi-Z Hi-Z L H
H = HIGH Logic Level L = LOW Logic Level X = Don't Care (Either LOW or HIGH Logic Level) Hi-Z = High Impedance (OFF) State
(c) 2000 Fairchild Semiconductor Corporation
DS009171
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DM74ALS541
Absolute Maximum Ratings(Note 1)
Supply Voltage Input Voltage: Control Inputs Voltage Applied to a Disabled 3-STATE Output Operating Free-Air Temperature Range Storage Temperature Range Typical JA N Package M Package 58.5C/W 77.5C/W 5.5V 0C to +70C -65C to +150C
Note 1: The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation.
7V 7V
Recommended Operating Conditions
Symbol VCC VIH VIL IOH IOL TA Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature 0 Parameter Min 4.5 2 0.8 -15 24 70 Nom 5 Max 5.5 Units V V V mA mA C
Electrical Characteristics
over recommended free air temperature range Symbol VIK VOH Parameter Input Clamp Voltage HIGH Level Output Voltage VOL II IIH IIL IOZH IOZL IO ICC LOW Level Output Voltage Input Current at Maximum Input Voltage HIGH Level Input Current LOW Level Input Current HIGH Level 3-STATE Output Current LOW Level 3-STATE Output Current Output Drive Current Supply Current VCC = Max, VI = 7V VCC = Max, VI = 2.7V VCC = Max, VI = 0.4V VCC = Max, VO = 2.7V VCC = Max, VO = 0.4V VCC = Max, VO = 2.25V VCC = Max Outputs HIGH Outputs LOW Outputs Disabled -30 6 15 13.5 Test Conditions VCC = Min, II = -18 mA VCC = 4.5V to 5.5V VCC = Min VCC = Min IOH = -0.4 mA IOH = -3 mA IOH = Max IOL = 12 mA IOL = 24 mA VCC - 2 2.4 2 0.25 0.35 0.4 0.5 100 20 -100 20 -20 -112 14 25 22 mA mA A A A A A mA 3.2 V Min Typ Max -1.2 Units V
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2
DM74ALS541
Switching Characteristics
over recommended operating free air temperature range Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ Parameter Propagation Delay Time LOW-to-HIGH Level Output Propagation Delay Time HIGH-to-LOW Level Output Output Enable Time to HIGH Level Output Output Enable Time to LOW Level Output Output Disable Time from HIGH Level Output Output Disable Time from LOW Level Output Conditions VCC = 4.5V to 5.5V, R1 = R2 = 500, CL = 50 pF From (Input) To (Output) A to Y A to Y Min 4 2 Max 14 10 Units ns ns
G to Y
5
15
ns
G to Y
8
20
ns
G to Y
1
10
ns
G to Y
2
12
ns
3
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DM74ALS541
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M20B
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4
DM74ALS541
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D
5
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DM74ALS541 Octal Buffer and Line Driver with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N20A
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com 6 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com


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