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74ABT821
Datasheet
General description
The 74ABT821 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.
The 74ABT821 bus interface register is designed to eliminate the extra packages required to buffer existing registers and provide extra data width for wider data/address paths of buses carrying parity.
The 74ABT821 is a buffered 10-bit wide version of the 74ABT374A and 74ABT534A functions.
The 74ABT821 is a 10-bit, edge triggered register coupled to ten 3-state output buffers. The two sections of the device are controlled independently by the clock (CP) and output enable (OE) control gates.
The register is fully edge triggered. The state of each D input, one set-up time before the LOW-to-HIGH clock transition is transferred to the corresponding output Q of the flip-flop.
The 3-state output buffers are designed to drive heavily loaded 3-state buses, MOS memories, or MOS microprocessors.
The active LOW output enable (OE) controls all ten 3-state buffers independent of the register operation. When OE is LOW, the data in the register appears at the outputs. When OE is HIGH, the outputs are in high-impedance OFF-state, which means they will neither drive nor load the bus.
Features
- High-speed parallel registers with positive-edge triggered D-type flip-flops
- Ideal where high speed, light loading, or increased fan-in are required with MOS microprocessors
- Output capability: +64 mA and -32 mA
- Power-on 3-state
- Power-on 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 |
|---|---|---|---|---|---|---|---|---|
| 74ABT821D | 74ABT821D | 9350 544 80602 | Volume production | SOT137-1
(SO24) | Tube (Signetics) | Standard Marking | 74ABT821D
| week 13, 2005 |
| 74ABT821D | 74ABT821D-T | 9350 544 80623 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" (Signetics) | Standard Marking | 74ABT821D
| week 13, 2005 |
| 74ABT821DB | 74ABT821DB | 9350 691 90112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | 74ABT821DB
| week 12, 2005 |
| 74ABT821DB | 74ABT821DB-T | 9350 691 90118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | 74ABT821DB
| week 12, 2005 |
| 74ABT821PW | 74ABT821PW | 9351 789 10112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | 74ABT821PW
| week 10, 2005 |
| 74ABT821PW | 74ABT821PW-T | 9351 789 10118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking | 74ABT821PW
| week 10, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74ABT821D | 9350 544 80602 | 1.1000 | NA | AVNET ELECTRONICS MARKETING | 960 | 9/5/2008 | Buy online | not available |
| 74ABT821D | 9350 544 80623 | 1.1000 | ASIA | WPI | 8,000 | 09/06/2008 | Buy online | Order samples |
| 74ABT821DB | 9350 691 90112 | 1.1000 | NA | ARROW ELECTRONICS | 27 | 9/5/2008 | Buy online | not available |
| NA | AVNET ELECTRONICS MARKETING | 1,219 | 9/5/2008 | Buy online | ||||
| 74ABT821DB | 9350 691 90118 | 1.1000 | Order samples | |||||
| 74ABT821PW | 9351 789 10112 | 2.3300 | NA | DIGI-KEY CORPORATION | 1,528 | 9/6/2008 | Buy online | not available |
| 74ABT821PW | 9351 789 10118 | 2.3300 | 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 | Fmax(MHz) | Propagation Delay(ns) | Voltage | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|
| 74ABT821D | SOT137-1
(SO24) | 10-Bit D-Type Flip-Flop; Positive-Edge Trigger (3-State) | 185 | 4.6 | 4.5-5.5 V | TTL | -32/+64 mA |
| 74ABT821DB | SOT340-1
(SSOP24) | 10-Bit D-Type Flip-Flop; Positive-Edge Trigger (3-State) | 185 | 4.6 | 4.5-5.5 V | TTL | -32/+64 mA |
| 74ABT821PW | SOT355-1
(TSSOP24) | 10-Bit D-Type Flip-Flop; Positive-Edge Trigger (3-State) | 185 | 4.6 | 4.5-5.5 V | TTL | -32/+64 mA |
Similar products
74ABT821 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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