SN74LS640DWR is available for purchase but is not normally stocked.
Available Substitutes:

Direct

SN74LS640DWR
Texas Instruments
In Stock: 0
Unit Price: R21,87791
Datasheet

Direct

SN74LS640DW
Rochester Electronics, LLC
In Stock: 3 603
Unit Price: R31,71390
Datasheet
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20-SOIC
Image shown is a representation only. Exact specifications should be obtained from the product data sheet.
20-SOIC
20-SOIC Pkg

SN74LS640DWR

DigiKey Part Number
296-29734-2-ND - Tape & Reel (TR)
Manufacturer
Texas Instruments
Manufacturer Product Number
SN74LS640DWR
Description
IC TXRX INVERT 5.25V 20-SOIC
Manufacturer Standard Lead Time
6 Weeks
Customer Reference
Detailed Description
Transceiver, Inverting 1 Element 8 Bit per Element 3-State Output 20-SOIC
Datasheet
 Datasheet
EDA/CAD Models
SN74LS640DWR Models
Product Attributes
Type
Description
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Category
Manufacturer
Texas Instruments
Series
74LS
Packaging
Tape & Reel (TR)
Part Status
Active
Logic Type
Transceiver, Inverting
Number of Elements
1
Number of Bits per Element
8
Input Type
-
Output Type
3-State
Current - Output High, Low
15mA, 24mA
Voltage - Supply
4.75V ~ 5.25V
Operating Temperature
0°C ~ 70°C (TA)
Mounting Type
Surface Mount
Package / Case
20-SOIC (0.295", 7.50mm Width)
Supplier Device Package
20-SOIC
Base Product Number
74LS640
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Available To Order
Check Lead Time
Quantity
All prices are in ZAR
Tape & Reel (TR)
QuantityUnit PriceExt Price
2 000R21,87791R43 755,82
4 000R21,40316R85 612,64
6 000R21,16553R126 993,18
Manufacturers Standard Package