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74ABT646A
General description
The 74ABT646A high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.
The 74ABT646A transceiver/register consists of bus transceiver circuits with 3-State outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or the internal registers. Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes High. Output Enable (OE) and DIR pins are provided to control the transceiver function. In the transceiver mode, data present at the high impedance port may be stored in either the A or B register or both.
The Select (SAB, SBA) pins determine whether data is stored or transferred through the device in real-time. The DIR determines which bus will receive data when the OE is active (Low). In the isolation mode (OE = High), data from Bus A may be stored in the B register and/or data from Bus B may be stored in the A register. When an output function is disabled, the input function is still enabled and may be used to store and transmit data. Only one of the two buses, A or B, may be driven at a time. The examples on the next page demonstrate the four fundamental bus management functions that can be performed with the 74ABT646A.
Features
- Combines 74ABT245 and 74ABT374 type functions in one device
- Independent registers for A and B buses
- Live insertion/extraction permitted
- Power-up 3-State
- Power-up reset
- Multiplexed real-time and stored data
- Output capability: +64mA/-32mA
- Latch-up protection exceeds 500mA per Jedec Std 17
- ESD protection exceeds 2000 V per MIL STD 883 Method 3015 and 200 V per Machine Model
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| 74ABT646AD | 74ABT646AD | 9351 926 30112 | Volume production | SOT137-1
(SO24) | Tube | Standard Marking | 74ABT646AD
| week 13, 2005 |
| 74ABT646AD | 74ABT646AD-T | 9351 926 30118 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" | Standard Marking | 74ABT646AD
| week 13, 2005 |
| 74ABT646ADB | 74ABT646ADB | 9351 926 40112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | 74ABT646ADB
| week 12, 2005 |
| 74ABT646ADB | 74ABT646ADB-T | 9351 926 40118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | 74ABT646ADB
| week 12, 2005 |
| 74ABT646APW | 74ABT646APW | 9351 926 60112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | 74ABT646APW
| week 10, 2005 |
| 74ABT646APW | 74ABT646APW-T | 9351 926 60118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking | 74ABT646APW
| week 10, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74ABT646AD | 9351 926 30112 | 1.2600 | not available | |||||
| 74ABT646AD | 9351 926 30118 | 1.2600 | Order samples | |||||
| 74ABT646ADB | 9351 926 40112 | 1.2600 | Order samples | |||||
| 74ABT646ADB | 9351 926 40118 | 1.2600 | Order samples | |||||
| 74ABT646APW | 9351 926 60112 | 1.2600 | Order samples | |||||
| 74ABT646APW | 9351 926 60118 | 1.2600 | Order samples |
Applications
- Desktop/Notebook (PCMCIA) video
- Multimedia
- Digital television
- Image processing
- Video phone
- Intercast.
Technical documents
Application Notes
AN203_2;
Test Fixtures for High Speed Logic (02-Apr-98)
Support Documents
Parametrics/similar products
| Type number | Package | Description | Fmax(MHz) | Propagation Delay(ns) | Voltage | No. of Pins | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74ABT646AD | SOT137-1
(SO24) | Transceiver/Register (3-State) | 350 | 4.4 | 4.5-5.5 V | 24 | TTL | -32/+64 mA |
| 74ABT646ADB | SOT340-1
(SSOP24) | Transceiver/Register (3-State) | 350 | 4.4 | 4.5-5.5 V | 24 | TTL | -32/+64 mA |
| 74ABT646APW | SOT355-1
(TSSOP24) | Transceiver/Register (3-State) | 350 | 4.4 | 4.5-5.5 V | 24 | TTL | -32/+64 mA |
Similar products
74ABT646A 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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