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74F299
Datasheet
General description
The 74F299 is an 8-bit universal shift/storage register with 3-State outputs. Four modes of operation are possible: Hold (store), shift left, shift right and parallel load. The parallel load inputs and flip-flop outputs are multiplexed to reduce the total number of package pins. Additional outputs are provided for flip-flops Q0 and Q7 to allow easy serial cascading. A separate active-LOW Master Reset is used to reset the register.
The 74F299 contains eight edge-triggered D-type flip-flops and the interstage logic necessary to perform synchronous shift left, shift right, parallel load and hold operations. The type of operation is determined by S0 and S1, as shown in the Function Table. All flip-flop outputs are brought out through 3-State buffers to separate I/O pins that also serve as data inputs in the parallel load mode. Q0 and Q7 are also brought out on other pins for expansion in serial shifting of longer words.
A LOW signal on MR overrides the Select and CP inputs and resets the flip-flops. All other state changes are initiated by the rising edge of the clock. Inputs can change when the clock is in either state provided only that the recommended set-up and hold times, relative to the rising edge of clock are observed.
A HIGH signal on either OE0 or OE1 disables the 3-State buffers and puts the I/O pins in the high impedance state. In this condition the shift, hold, load and reset operations can still occur. The 3-State buffers are also disabled by High signals on both S0 and S1 in preparation for a parallel load operation.
Features
- Common parallel I/O for reduced pin count
- Additional serial inputs and outputs for expansion
- Four operating modes: Shift left, shift right, load and store
- 3-State outputs for bus-oriented applications
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| N74F299D | N74F299D | 9338 289 60602 | Volume production | SOT163-1
(SO20) | Tube (Signetics) | Standard Marking | N74F299D
| week 30, 2004 |
| N74F299D | N74F299D-T | 9338 289 60623 | Volume production | SOT163-1
(SO20) | Reel Pack, SMD, 13" (Signetics) | Standard Marking | N74F299D
| week 30, 2004 |
| N74F299N | N74F299N | 9337 948 70602 | Volume production | SOT146-1
(DIP20) | Tube (Signetics) | Standard Marking | N74F299N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| N74F299D | 9338 289 60602 | 0.5900 | NA | ARROW ELECTRONICS | 1,420 | 8/5/2008 | Buy online | not available |
| N74F299D | 9338 289 60623 | 0.5900 | Order samples | |||||
| N74F299N | 9337 948 70602 | 0.5900 | NA | ARROW ELECTRONICS | 212 | 8/5/2008 | Buy online | Order samples |
| ASIA | WPG | 180 | 08/05/2008 | Buy online |
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 |
|---|---|---|---|---|---|---|---|---|
| N74F299D | SOT163-1
(SO20) | 8-Bit Universal Shift/Store Register (3-State) | 100 | 6 | 4.5-5.5 V | 20 | TTL | -1/+20 mA |
| N74F299N | SOT146-1
(DIP20) | 8-Bit Universal Shift/Store Register (3-State) | 100 | 6 | 4.5-5.5 V | 20 | TTL | -1/+20 mA |
Similar products
74F299 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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