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74LV244 Schematic ( PDF Datasheet ) - Philips

Teilenummer 74LV244
Beschreibung Octal buffer/line driver 3-State
Hersteller Philips
Logo Philips Logo 




Gesamt 12 Seiten
74LV244 Datasheet, Funktion
INTEGRATED CIRCUITS
74LV244
Octal buffer/line driver (3-State)
Product specification
Supersedes data of 1997 Feb 19
IC24 Data Handbook
1998 May 20
Philips
Semiconductors






74LV244 Datasheet, Funktion
Philips Semiconductors
Octal buffer/line driver (3-State)
Product specification
74LV244
AC CHARACTERISTICS
GND = 0V; tr = tf 2.5ns; CL = 50pF; RL =1K
SYMBOL
PARAMETER
WAVEFORM
CONDITION
VCC(V)
1.2
tPHL/tPLH
Propagation delay
1An to 1Yn;
2An to 2Yn
Figures 1, 2
2.0
2.7
3.0 to 3.6
4.5 to 5.5
1.2
tPZH/tPZL
3-State output enable time
1OE to 1Yn;
2OE to 2Yn
Figures 2, 3
2.0
2.7
3.0 to 3.6
4.5 to 5.5
1.2
tPHZ/tPLZ
3-State output disable time
1OE to 1Yn;
2OE to 2Yn
Figures 2, 3
2.0
2.7
3.0 to 3.6
4.5 to 5.5
NOTES:
1. Unless otherwise stated, all typical values are measured at Tamb = 25°C.
2. Typical values are measured at VCC = 3.3 V.
LIMITS
–40 to +85 °C
–40 to +125 °C
MIN TYP1 MAX MIN MAX
50
17 24
31
13 17
92 14
23
18
12 15
65
22 39
49
16 29
122 23
36
29
19 24
60
22 34
43
17 24
32
132 21
26
16 19
UNIT
ns
ns
ns
AC WAVEFORMS
VM = 1.5 V at VCC 2.7 V and 3.6 V
VM = 0.5 × VCC at VCC < 2.7 V and 4.5 V
VOL and VOH are the typical output voltage drop that occur with the
output load.
VX = VOL + 0.3 V at VCC 2.7 V and 3.6 V
VX = VOL + 0.1 × VCC at VCC < 2.7 V and 4.5 V
VY = VOH – 0.3 V at VCC 2.7V and 3.6 V
VY = VOH – 0.1 × VCC at VCC < 2.7 V and 4.5 V
VI
1An, 2An
INPUTS
GND
VOH
tPHL
1Yn, 2Yn
OUTPUT
VOL
VM
VM
tPLH
SV00617
Figure 1. Input (1An, 2An) to output (1Yn, 2Yn)
propagation delays.
VI
OE INPUT
GND
VCC
Qn OUTPUT
LOW-to-OFF
OFF-to-LOW
VOL
VOH
Qn OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
VM
tPLZ
tPZL
VX
tPHZ
VM
tPZH
VY
outputs
enabled
outputs
disabled
VM
outputs
enabled
SV00623
Figure 2. 3-State enable and disable times.
1998 May 20
6

6 Page









74LV244 pdf, datenblatt
Philips Semiconductors
Octal buffer/line driver (3-State)
Product specification
74LV244
DEFINITIONS
Data Sheet Identification
Product Status
Definition
Objective Specification
Formative or in Design
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
Preliminary Specification
Preproduction Product
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
Product Specification
Full Production
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICATIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
© Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code
Document order number:
Date of release: 05-96
9397-750-04437
Philips
Semiconductors
1998 May 20
12

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