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74F640
Datasheet
General description
The 74F640 is an octal transceiver featuring inverting 3-State bus compatible outputs in both transmit and receive directions. The B port outputs are capable of sinking 64mA and sourcing 15mA, providing very good capacitive drive characteristics. The device features an Output Enable (OE) input for easy cascading and Transmit/Receiver (T/R) input for direction control. The 3-State outputs, B0?B7, have been designed to prevent output bus loading if the power is removed from the device.
Features
- High-impedance NPN base inputs for reduced loading (70µA in High and Low states)
- Ideal for applications which require high-output drive and minimal bus loading
- Inverting version of 74F245
- Octal bidirectional bus interface
- 3-State outputs sink 64mA and source 15mA
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| N74F640D | N74F640D | 9337 843 30602 | Volume production | SOT163-1
(SO20) | Tube (Signetics) | Standard Marking | N74F640D
| week 30, 2004 |
| N74F640D | N74F640D-T | 9337 843 30623 | Volume production | SOT163-1
(SO20) | Reel Pack, SMD, 13" (Signetics) | Standard Marking | N74F640D
| week 30, 2004 |
| N74F640N | N74F640N | 9337 843 40602 | Volume production | SOT146-1
(DIP20) | Tube (Signetics) | Standard Marking | N74F640N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| N74F640D | 9337 843 30602 | 0.8800 | not available | |||||
| N74F640D | 9337 843 30623 | 0.8800 | Order samples | |||||
| N74F640N | 9337 843 40602 | 0.8800 | Order samples |
Applications
Related applications
Low / mid-range analog CRT TV (TV200)
Highly featured analog CRT TV (TV210)
50-60 Hz CRT integrated DTV (TV210D)
Mid-range integrated DTV (TV810)
Transceiver board
Main CPU board
Technical documents
Application Notes
AN202_1;
Testing and specifying FAST logic (01-Jun-87)
AN203_2;
Test Fixtures for High Speed Logic (02-Apr-98)
AN216_2;
Arbitration in shared resource systems (18-Jul-88)
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Logic Switching Levels | Output Drive Capability | Output Current(A) |
|---|---|---|---|---|---|---|---|---|
| N74F640D | SOT163-1
(SO20) | Transceiver with Direction Pin; Inverting (3-State) | 4.5 | 4.5-5.5 V | 20 | TTL | -15/+64 mA (B side) | -3/+24 mA (A side) |
| N74F640N | SOT146-1
(DIP20) | Transceiver with Direction Pin; Inverting (3-State) | 4.5 | 4.5-5.5 V | 20 | TTL | -15/+64 mA (B side) | -3/+24 mA (A side) |
Similar products
74F640 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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