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74HC/HCT5555
General description
The 74HC/HCT5555 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
The 74HC/HCT5555 are precision programmable delay timers which consist of:
- 24-stage binary counter
- integrated oscillator (using external timing components)
- retriggerable/non-retriggerable monostable
- automatic power-ON reset
- output control logic
- oscillator control logic
- overriding asynchronous master reset (MR).
Features
- Positive and negative edge triggered
- Retriggerable or non-retriggerable
- Programmable delay
minimum: 100 ns
maximum: depends on input
frequency and division ratio - Divide-by range of 2 to 224
- Direct reset terminates output pulse
- Very low power consumption in triggered start mode
- 3 oscillator operating modes:
RC oscillator
Crystal oscillator
External oscillator - Device is unaffected by variations in temperature and VCC when using an external oscillator
- Automatic power-ON reset
- Schmitt trigger action on both trigger inputs
- Direct drive for a power transistor
- Low power consumption in active mode with respect to TTL type timers
- High precision due to digital timing
- Output capability: 20 mA
- ICC category: MSI.
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| 74HC5555D | 74HC5555D | 9339 985 90112 | Volume production | SOT109-1
(SO16) | Bulk Pack | Standard Marking | 74HC5555D
| week 4, 2004 |
| 74HC5555D | 74HC5555D-T | 9339 985 90118 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13" | Standard Marking | 74HC5555D
| week 4, 2004 |
| 74HC5555N | 74HC5555N | 9339 985 80112 | Volume production | SOT38-4
(DIP16) | Bulk Pack | Standard Marking | 74HC5555N
| Always Pb-free |
| 74HCT5555D | 74HCT5555D | 9339 986 10112 | Volume production | SOT109-1
(SO16) | Bulk Pack | Standard Marking | 74HCT5555D
| week 4, 2004 |
| 74HCT5555D | 74HCT5555D-T | 9339 986 10118 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13" | Standard Marking | 74HCT5555D
| week 4, 2004 |
| 74HCT5555N | 74HCT5555N | 9339 986 00112 | Volume production | SOT38-4
(DIP16) | Bulk Pack | Standard Marking | 74HCT5555N
| Always Pb-free |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| 74HC5555D | 9339 985 90112 | 0.9500 | NA | DIGI-KEY CORPORATION | 508 | 6/29/2008 | Buy online | not available |
| 74HC5555D | 9339 985 90118 | 0.9500 | NA | MOUSER ELECTRONICS | 2,482 | 7/3/2008 | Buy online | Order samples |
| 74HC5555N | 9339 985 80112 | 0.9500 | NA | ARROW ELECTRONICS | 2,141 | 7/3/2008 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 462 | 6/29/2008 | Buy online | ||||
| 74HCT5555D | 9339 986 10112 | 0.9500 | NA | DIGI-KEY CORPORATION | 4,915 | 6/29/2008 | Buy online | Order samples |
| 74HCT5555D | 9339 986 10118 | 0.9500 | NA | MOUSER ELECTRONICS | 2,391 | 7/3/2008 | Buy online | Order samples |
| 74HCT5555N | 9339 986 00112 | 0.9500 | NA | ARROW ELECTRONICS | 53 | 7/3/2008 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 22 | 6/29/2008 | Buy online |
Applications
- Motor control
- Attic fan timers
- Delay circuits
- Automotive applications
- Precision timing
- Domestic appliances.
Parametrics/similar products
| Type number | Package | Description | Fmax(MHz) | Propagation Delay(ns) | Voltage | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74HC5555D | SOT109-1
(SO16) | Programmable Delay Timer with Oscillator | 89 | 24@5V | 2.0-6.0 V | Low Power or Battery Applications | CMOS | - 20/ + 25 mA |
| 74HC5555N | SOT38-4
(DIP16) | Programmable Delay Timer with Oscillator | 24@5V | 2.0-6.0 V | Low Power or Battery Applications | CMOS | - 20/ + 25 mA | |
| 74HCT5555D | SOT109-1
(SO16) | Programmable Delay Timer with Oscillator; TTL Enabled | 75 | 24 | 4.5-5.5 V | Low Power | TTL | +/- 20 mA |
| 74HCT5555N | SOT38-4
(DIP16) | Programmable Delay Timer with Oscillator; TTL Enabled | 75 | 24 | 4.5-5.5 V | Low Power | TTL | +/- 20 mA |
Similar products
74HC/HCT5555 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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