74LVCH244A NXP [NXP Semiconductors], 74LVCH244A Datasheet

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74LVCH244A

Manufacturer Part Number
74LVCH244A
Description
Octal buffer/line driver; 3-state
Manufacturer
NXP [NXP Semiconductors]
Datasheet

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1. General description
2. Features
The 74LVC244A; 74LVCH244A is an octal non-inverting buffer/line driver with 3-state
outputs. The 3-state outputs are controlled by the output enable inputs 1OE and 2OE.
A HIGH on nOE causes the outputs to assume a high-impedance OFF-state.
Schmitt-trigger action at all inputs makes the circuit highly tolerant for slower input rise
and fall times.
Inputs can be driven from either 3.3 V or 5.0 V devices. In 3-state operation, outputs can
handle 5 V. These features allow the use of these devices as translators in a mixed
3.3 V and 5 V environment.
The 74LVCH244A bus hold on data inputs eliminates the need for external pull-up
resistors to hold unused inputs.
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74LVC244A; 74LVCH244A
Octal buffer/line driver; 3-state
Rev. 06 — 13 August 2009
5 V tolerant inputs/outputs for interfacing with 5 V logic
Wide supply voltage range from 1.2 V to 3.6 V
CMOS low-power consumption
Direct interface with TTL levels
Inputs accept voltages up to 5.5 V
High-impedance when V
Bus hold on all data inputs (74LVCH244A only)
Complies with JEDEC standard no. 8-1A
ESD protection:
Specified from 40 C to +85 C and 40 C to +125 C
N
N
HBM JESD22-A114E exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
CC
= 0 V
Product data sheet

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74LVCH244A Summary of contents

Page 1

... Inputs can be driven from either 3 5.0 V devices. In 3-state operation, outputs can handle 5 V. These features allow the use of these devices as translators in a mixed 3.3 V and 5 V environment. The 74LVCH244A bus hold on data inputs eliminates the need for external pull-up resistors to hold unused inputs. 2. Features ...

Page 2

... C to +125 C 74LVCH244ABQ 74LVC244ABX +125 C 74LVCH244ABX 4. Functional diagram Fig 1. Logic symbol 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A Name Description SO20 plastic small outline package; 20 leads; body width 7.5 mm SSOP20 plastic shrink small outline package; 20 leads; body width 5.3 mm TSSOP20 plastic thin shrink small outline package; 20 leads; ...

Page 3

... NXP Semiconductors mna873 Fig 2. IEC logic diagram 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A Fig 3. Functional diagram Rev. 06 — 13 August 2009 Octal buffer/line driver; 3-state 1A0 1Y0 2 18 1A1 1Y1 4 16 1Y2 ...

Page 4

... GND 10 2A0, 2A1, 2A2, 2A3 17, 15, 13, 11 data input 1Y0, 1Y1, 1Y2, 1Y3, 18, 16, 14, 12 data output 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A 2OE 18 1Y0 17 2A0 16 1Y1 15 2A1 14 ...

Page 5

... The output voltage ratings may be exceeded if the output current ratings are observed. [3] For SO20 packages: above 70 C derate linearly with 8 mW/K. For (T)SSOP20 packages: above 60 C derate linearly with 5.5 mW/K. For DHVQFN20 and DHXQFN20U packages: above 60 C derate linearly with 4.5 mW/K. 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A Input nAn Conditions V < ...

Page 6

... I current I supply current additional supply per input pin current I O 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A Conditions maximum speed performance functional output HIGH or LOW output 3-state in free air ...

Page 7

... For I/O ports the parameter I includes the input leakage current. OZ [4] Valid for data inputs of bus hold parts only (74LVCH244A). Note that control inputs do not have a bus hold circuit. [5] The specified sustaining current at the data input holds the input below the specified V [6] The specifi ...

Page 8

... 11. AC waveforms Measurement points are given in Logic levels: V and Fig 6. The input (nAn) to output (nYn) propagation delays 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A …continued Figure = GND 3 amb = 25 C and V = 3.3 V. amb ...

Page 9

... Logic levels: V and Fig 7. 3-state enable and disable times. Table 8. Measurement points Supply voltage Input 1 2.7 V 2 3.6 V 2.7 V 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A GND t PLZ PHZ GND outputs enabled Table 8 ...

Page 10

... Fig 8. Test circuit for measuring switching times Table 9. Test data Supply voltage Input 2.7 V 2 3.6 V 2.7 V [1] The circuit performs better when R 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A negative V M pulse positive ...

Page 11

... Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. OUTLINE VERSION IEC SOT163-1 075E04 Fig 9. Package outline SOT163-1 (SO20) 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A scale (1) ( ...

Page 12

... max. 0.21 1. 0.25 0.05 1.65 Note 1. Plastic or metal protrusions of 0.2 mm maximum per side are not included. OUTLINE VERSION IEC SOT339-1 Fig 10. Package outline SOT339-1 (SSOP20) 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A 2.5 scale (1) ( ...

Page 13

... Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION IEC SOT360-1 Fig 11. Package outline SOT360-1 (TSSOP20) 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A 2.5 scale ...

Page 14

... max. 0.05 0. 0.2 0.00 0.18 Note 1. Plastic or metal protrusions of 0.075 mm maximum per side are not included. OUTLINE VERSION IEC SOT764 Fig 12. Package outline SOT764-1 (DHVQFN20) 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A 2.5 scale (1) ( 4.6 3 ...

Page 15

... DIMENSIONS (mm are the original dimensions) A UNIT max 0.05 0.30 4.6 mm 0.5 0.00 0.18 4.4 OUTLINE VERSION IEC SOT1045 Fig 13. Package outline SOT1045-1 (DHXQFN20U) 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A 2.5 scale 3.35 2.6 1.35 0.45 0.5 3.5 3.05 2.4 1.05 0.25 REFERENCES JEDEC JEITA - - - Rev. 06 — ...

Page 16

... The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. • Legal texts have been adapted to the new company name where appropriate. • Added type numbers 74LVC244ABX and 74LVCH244ABX (DHXQFN20U package). Product specification Product specification Product specification Product specification Rev. 06 — ...

Page 17

... For more information, please visit: For sales office addresses, please send an email to: 74LVC_LVCH244A_6 Product data sheet 74LVC244A; 74LVCH244A [3] Definition This document contains data from the objective specification for product development. This document contains data from the preliminary specification. ...

Page 18

... Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 16 Contact information Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 74LVC244A; 74LVCH244A Octal buffer/line driver; 3-state Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2009. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp ...

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