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PCKEL14
Datasheet
General description
The PCKEL14 is a low skew 1:5 clock distribution chip designed explicitly for low skew clock distribution applications. The device can be driven by either a differential or single-ended ECL, or if positive power supplies are used, PECL input signal. The PCKEL14 is designed to operate in ECL or PECL mode for a voltage supply range of -2.375 V to -3.8 V (or 2.375 V to 3.8 V).
The PCKEL14 features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. When LOW (or left open and pulled LOW by the input pull-down resistor), the SEL pin will select the differential clock input.
The common enable (EN) is synchronous, so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/disabled, as can happen with an asynchronous control. The internal flip-flop is clocked on the falling edge of the input clock, therefore all associated specification limits are referenced to the negative edge of the clock input.
The VBB pin (an internally generated voltage supply) is available to this device only. For single-ended conditions, the unused differential input is connected to VBB as a switching reference voltage. VBB may also rebias AC-coupled inputs. When used, decouple VBB and VCC via a 0.01 uF capacitor and limit current sourcing or sinking to 0.1 mA. When not used, VBB should be left open.
Features
- 50 ps output-to-output skew at 3.3 V
- Synchronous enable/disable
- Multiplexed clock input
- ESD protection: > 2.5 kV HBM
- The PCK series contains temperature compensation
- PECL mode operating range: VCC = 2.375 V to 3.8 V, with VEE = 0 V
- NECL mode operating range: VCC = 0 V, with VEE = -2.375 V to -3.8 V
- Internal 75 kOhm pull-down resistors on all inputs, plus a 37.5 kOhm pull-up on CLK
- Q output will default LOW with inputs open or at VEE
- Meets or exceeds JEDEC spec EIA/JESD78 IC latch-up test
- Moisture sensitivity level 1
- Flammability rating: UL-94 code V-0 @ 1/8?
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCKEL14D | PCKEL14D-T | 9352 723 61118 | Volume production | SOT163-1
(SO20) | Tape reel smd | Standard Marking | PCKEL14D
| week 51, 2004 |
| PCKEL14D | PCKEL14D | 9352 723 61112 | Volume production | SOT163-1
(SO20) | Tube | Standard Marking | PCKEL14D
| week 51, 2004 |
| PCKEL14PW | PCKEL14PW | 9352 727 11112 | Volume production | SOT360-1
(TSSOP20) | Tube | Standard Marking | PCKEL14PW
| week 13, 2005 |
| PCKEL14PW | PCKEL14PW-T | 9352 727 11118 | Volume production | SOT360-1
(TSSOP20) | Reel Pack, SMD, 13" | Standard Marking | PCKEL14PW
| week 13, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| PCKEL14D | 9352 723 61118 | 5.2000 | not available | |||||
| PCKEL14D | 9352 723 61112 | 5.2000 | Order samples | |||||
| PCKEL14PW | 9352 727 11112 | 5.2000 | Order samples | |||||
| PCKEL14PW | 9352 727 11118 | 5.2000 | not available |
Technical documents
Support Documents
75010459;
PCK111/PCK210/PCKEL14/PCKEP14 High-performance PECL Clock Distribution Family Leaflet (2002-10-01)
75010759;
PCK2111 LVDS Clock Distribution IC (2002-12-20)
Parametrics/similar products
| Type number | Package | Supply voltage(V) | Application | Other features | Operating temp.(Cel) | Operating Frequency(MHz) | Inputs | Outputs | Rise/fall time(ps) | Skew (output-output)(ps) | Skew (part-part)(ps) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| PCKEL14D | SOT163-1
(SO20) |
2.5 3.3 | high-performance PECL clock distribution | synchronous output enable | -40~+85 | 1500 | 1 x Differential PECL, 1 x Single-ended PECL | 5 x Differential PECL | 300 | 50 | 200 |
| PCKEL14PW | SOT360-1
(TSSOP20) |
2.5 3.3 | high-performance PECL clock distribution | synchronous output enable | -40~+85 | 1500 | 1 x Differential PECL, 1 x Single-ended PECL | 5 x Differential PECL | 300 | 50 | 200 |
Similar products
PCKEL14 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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