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74F821
Datasheet
General description
The 74F821 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 74F821 is a buffered 10-bit wide version of the popular 74F374/74F534 functions.
Features
- High speed parallel registers with positive edge-triggered D-type flip-flops
- High performance bus interface buffering for wide data/address paths or buses carrying parity
- High-impedance PNP base inputs for reduced loading (20 uA in HIGH and LOW states)
- IIL is 20 uA versus 1000 uA for AM29821 series
- Buffered control inputs to reduce AC effects
- Ideal where high speed, light loading, or increased fan-in as required with MOS microprocessor
- Positive and negative over-shoots are clamped to ground
- 3-State outputs glitch free during power-up and power-down
- Slim Dip 300 mil package
- Broadside pinout compatible with AMD AM 29821
- Outputs sink 64 mA and source 24 mA
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| N74F821D | N74F821D | 9339 450 50602 | Volume production | SOT137-1
(SO24) | Tube (Signetics) | Standard Marking | N74F821D
| week 13, 2005 |
| N74F821D | N74F821D-T | 9339 450 50623 | Volume production | SOT137-1
(SO24) | Reel Pack, SMD, 13" (Signetics) | Standard Marking | N74F821D
| week 13, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| N74F821D | 9339 450 50602 | 1.1100 | not available | |||||
| N74F821D | 9339 450 50623 | 1.1100 | Order samples |
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 | Fmax(MHz) | Propagation Delay(ns) | Voltage | No. of Pins | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| N74F821D | SOT137-1
(SO24) | 10-Bit D-Type Flip-Flop; Positive-Edge Trigger; Non-Inverting (3-State) | 180 | 6.5 | 4.5-5.5 V | 24 | TTL | -24/+64 mA |
Similar products
74F821 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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