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74HC/HCT640
General description
The 74HC/HCT640 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
The 74HC/HCT640 are octal transceivers featuring inverting 3-state bus compatible outputs in both send and receive directions.
The '640' features an output enable (OE) input for easy cascading and a send/receive (DIR) for direction control. OE controls the outputs so that the buses are effectively isolated. The '640' is similar to the '245' but has inverting outputs.
Features
- Octal bidirectional bus interface
- Inverting 3-state outputs
- Output capability: bus driver
- ICC category: MSI
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| 74HC640D | 74HC640D | 9337 136 00652 | Volume production | SOT163-1
(SO20) | Bulk Pack, CECC | Standard Marking | 74HC640D
| week 30, 2004 |
| 74HC640D | 74HC640D-T | 9337 136 00653 | Volume production | SOT163-1
(SO20) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HC640D
| week 30, 2004 |
| 74HC640DB | 74HC640DB | 9351 902 00112 | Volume production | SOT339-1
(SSOP20) | Tube | Standard Marking | 74HC640DB
| week 13, 2005 |
| 74HC640DB | 74HC640DB-T | 9351 902 00118 | Volume production | SOT339-1
(SSOP20) | Reel Pack, SMD, 13" | Standard Marking | 74HC640DB
| week 13, 2005 |
| 74HC640N | 74HC640N | 9336 707 10652 | Volume production | SOT146-1
(DIP20) | Bulk Pack, CECC | Standard Marking | 74HC640N
| Always Pb-free |
| 74HCT640D | 74HCT640D | 9337 136 10652 | Volume production | SOT163-1
(SO20) | Bulk Pack, CECC | Standard Marking | 74HCT640D
| week 30, 2004 |
| 74HCT640D | 74HCT640D-T | 9337 136 10653 | Volume production | SOT163-1
(SO20) | Reel Pack, SMD, 13", CECC | Standard Marking | 74HCT640D
| week 30, 2004 |
| 74HCT640DB | 74HCT640DB | 9351 901 90112 | Volume production | SOT339-1
(SSOP20) | Tube | Standard Marking | 74HCT640DB
| week 17, 2005 |
| 74HCT640DB | 74HCT640DB-T | 9351 901 90118 | Volume production | SOT339-1
(SSOP20) | Reel Pack, SMD, 13" | Standard Marking | 74HCT640DB
| week 17, 2005 |
| 74HCT640N | 74HCT640N | 9336 709 60652 | Volume production | SOT146-1
(DIP20) | Bulk Pack, CECC | Standard Marking | 74HCT640N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74HC640D | 9337 136 00652 | 0.5600 | not available | |||||
| 74HC640D | 9337 136 00653 | 0.5600 | Order samples | |||||
| 74HC640DB | 9351 902 00112 | 0.5600 | NA | DIGI-KEY CORPORATION | 1,161 | 8/28/2008 | Buy online | not available |
| 74HC640DB | 9351 902 00118 | 0.5600 | NA | MOUSER ELECTRONICS | 990 | 8/28/2008 | Buy online | Order samples |
| 74HC640N | 9336 707 10652 | 0.5600 | NA | ARROW ELECTRONICS | 1,402 | 8/27/2008 | Buy online | not available |
| NA | AVNET ELECTRONICS MARKETING | 1,126 | 8/27/2008 | Buy online | ||||
| NA | FUTURE ELECTRONICS | 1,512 | 8/27/2008 | Buy online | ||||
| 74HCT640D | 9337 136 10652 | 0.5600 | NA | ARROW ELECTRONICS | 407 | 8/27/2008 | Buy online | not available |
| NA | AVNET ELECTRONICS MARKETING | 227 | 8/27/2008 | Buy online | ||||
| 74HCT640D | 9337 136 10653 | 0.5600 | Order samples | |||||
| 74HCT640DB | 9351 901 90112 | 0.5600 | NA | DIGI-KEY CORPORATION | 399 | 8/28/2008 | Buy online | not available |
| 74HCT640DB | 9351 901 90118 | 0.5600 | Order samples | |||||
| 74HCT640N | 9336 709 60652 | 0.5600 | NA | ARROW ELECTRONICS | 1,422 | 8/27/2008 | Buy online | Order samples |
| NA | AVNET ELECTRONICS MARKETING | 2,378 | 8/27/2008 | Buy online | ||||
| NA | DIGI-KEY CORPORATION | 1,219 | 8/28/2008 | Buy online | ||||
| EU | FARNELL | 528 | 8/27/2008 | Buy online | ||||
| NA | MOUSER ELECTRONICS | 670 | 8/28/2008 | Buy online | ||||
| NA | NEWARK | 528 | 8/27/2008 | Buy online |
Applications
- Bus interfaces.
Related applications
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)
Transceiver board
Main CPU board
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74HC640D | SOT163-1
(SO20) | Transceiver with Direction Pin; Inverting (3-State) | 9@5V | 2.0-6.0 V | 20 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HC640DB | SOT339-1
(SSOP20) | Transceiver with Direction Pin; Inverting (3-State) | 9@5V | 2.0-6.0 V | 20 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HC640N | SOT146-1
(DIP20) | Transceiver with Direction Pin; Inverting (3-State) | 9@5V | 2.0-6.0 V | 20 | Low Power or Battery Applications | CMOS | +/- 7.8 mA |
| 74HCT640D | SOT163-1
(SO20) | Transceiver with Direction Pin; Inverting; TTL Enabled (3-State) | 9 | 4.5-5.5 V | 20 | Low Power | TTL | +/- 6 mA |
| 74HCT640DB | SOT339-1
(SSOP20) | Transceiver with Direction Pin; Inverting; TTL Enabled (3-State) | 9 | 4.5-5.5 V | 20 | Low Power | TTL | +/- 6 mA |
| 74HCT640N | SOT146-1
(DIP20) | Transceiver with Direction Pin; Inverting; TTL Enabled (3-State) | 9 | 4.5-5.5 V | 20 | Low Power | TTL | +/- 6 mA |
Similar products
74HC/HCT640 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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