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74ABT544
Datasheet
General description
The 74ABT544 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.
The 74ABT544 octal latched transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate latch enable (LEAB and LEBA) and output enable (OEAB and OEBA) inputs are provided for each register to permit independent control of data transfer in either direction. The outputs are guaranteed to sink 64 mA.
The 74ABT544 contains two sets of eight D-type latches, with separate control pins for each set. Using data flow from A to B as an example, when the A-to-B enable (EAB) input and the A-to-B latch enable (LEAB) input are LOW, the A-to-B path is transparent. A subsequent LOW-to-HIGH transition of the LEAB signal puts the A data into the latches where it is stored and the B outputs no longer change with the A inputs. With EAB and OEAB both LOW, the 3-state B output buffers are active and invert the data present at the outputs of the A latches.
Control of data flow from B to A is similar, but using the EBA, LEBA and OEBA inputs.
Features
- Combines 74ABT640 and 74ABT373 type functions in one device
- 8-bit octal transceiver with D-type latch
- Back-to-back registers for storage
- Separate controls for data flow in each direction
- Output capability: +64 mA and -32 mA
- Live insertion and extraction permitted
- Power-up 3-state
- Power-up reset
- Latch-up protection:
- JESD78: exceeds 500 mA
- ESD protection:
- MIL STD 883 method 3015: exceeds 2000 V
- Machine model: exceeds 200 V
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| 74ABT544D | 74ABT544D | 9350 479 50602 | Volume production | SOT137-1
(SO24) | Tube (Signetics) | Standard Marking | 74ABT544D
| week 14, 2005 |
| 74ABT544D | 74ABT544D-T | 9350 479 50623 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" (Signetics) | Standard Marking | 74ABT544D
| week 14, 2005 |
| 74ABT544DB | 74ABT544DB | 9350 665 20112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | 74ABT544DB
| week 12, 2005 |
| 74ABT544DB | 74ABT544DB-T | 9350 665 20118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | 74ABT544DB
| week 12, 2005 |
| 74ABT544PW | 74ABT544PW | 9351 788 50112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | 74ABT544PW
| week 14, 2005 |
| 74ABT544PW | 74ABT544PW-T | 9351 788 50118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking | 74ABT544PW
| week 14, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74ABT544D | 9350 479 50602 | 2.5200 | NA | DIGI-KEY CORPORATION | 770 | 8/28/2008 | Buy online | not available |
| 74ABT544D | 9350 479 50623 | 2.5200 | Order samples | |||||
| 74ABT544DB | 9350 665 20112 | 2.5200 | NA | DIGI-KEY CORPORATION | 826 | 8/28/2008 | Buy online | not available |
| 74ABT544DB | 9350 665 20118 | 2.5200 | Order samples | |||||
| 74ABT544PW | 9351 788 50112 | 2.5200 | NA | DIGI-KEY CORPORATION | 1,386 | 8/28/2008 | Buy online | not available |
| 74ABT544PW | 9351 788 50118 | 2.5200 | Order samples |
Technical documents
Application Notes
AN203_2;
Test Fixtures for High Speed Logic (02-Apr-98)
Support Documents
Parametrics/similar products
| Type number | Package | Description | Propagation Delay(ns) | Voltage | No. of Pins | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|
| 74ABT544D | SOT137-1
(SO24) | Latched Transceiver; Inverting (3-State) | 3.9 | 4.5-5.5 V | 24 | TTL | -32/+64 mA |
| 74ABT544DB | SOT340-1
(SSOP24) | Latched Transceiver; Inverting (3-State) | 3.9 | 4.5-5.5 V | 24 | TTL | -32/+64 mA |
| 74ABT544PW | SOT355-1
(TSSOP24) | Latched Transceiver; Inverting (3-State) | 3.9 | 4.5-5.5 V | 24 | TTL | -32/+64 mA |
Similar products
74ABT544 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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