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74LVC646A
Datasheet
(Product Specification)
29-Jun-04, 24 pages, 131 kB
General description
The 74LVC646A is a high-performance, low-power, low-voltage, Si-gate CMOS device and superior to most advanced CMOS compatible TTL families.
Inputs can be driven from either 3.3 V or 5 V devices. In 3-state operation, outputs can handle 5 V. This feature allows the use of these devices as translators in a mixed 3.3 V and 5 V environment.
The 74LVC646A consists of non-inverting bus transceiver circuits with 3-state outputs, D-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the internal registers. Data on the A or B bus will be clocked in the internal registers, as the appropriate clock (CPAB or CPBA) goes to a HIGH logic level. Output enable (OE) and direction (DIR) inputs are provided to control the transceiver function. In the transceiver mode, data present at high-impedance port may be stored in either the A or B register, or in both. With the select source inputs (SAB and SBA) stored and real-time (transparent mode) data can be multiplexed. The direction (DIR) input determines which bus will receive data when OE is active (LOW). In the isolation mode (OE = HIGH), A data may be stored in the B register and/or B data may be stored in the A register. When an output function is disabled, the input function is still enabled and may be used to store and transmit data. Only one of the two buses A or B may be driven at a time.
Features
- 5 V tolerant inputs/outputs for interfacing with 5 V logic
- Supply voltage range from 1.2 V to 3.6 V
- Complies with JEDEC standard JESD8-B/JESD36
- CMOS low-power consumption
- Direct interface with TTL levels
- 8-bit octal transceiver with D-type latch
- Back-to-back registers for storage
- Separate controls for data flow in each direction
- Supports partial power-down applications; inputs/outputs are high-impedance when VCC = 0 V
- ESD protection:
- HBM EIA/JESD22-A114-B exceeds 2000 V
- MM EIA/JESD22-A115-A exceeds 200 V.
- Specified from -40 Cel to +85Cel and -40 Cel to +125 Cel.
Products/packages
| Type number | Orderable part number | Ordering code (12NC) | Product status | Package | Packing | Marking | ECCN |
|---|---|---|---|---|---|---|---|
| 74LVC646AD | 74LVC646AD,112 | 9352 506 00112 | Volume production | SOT137 | Tube | Standard Marking | |
| 74LVC646AD | 74LVC646AD,118 | 9352 506 00118 | Volume production | SOT137 | Reel Pack, SMD, 13" | Standard Marking | |
| 74LVC646ADB | 74LVC646ADB,112 | 9352 505 80112 | Volume production | SOT340-1
(SSOP24) | Tube | Standard Marking | |
| 74LVC646ADB | 74LVC646ADB,118 | 9352 505 80118 | Volume production | SOT340-1
(SSOP24) | Reel Pack, SMD, 13" | Standard Marking | |
| 74LVC646APW | 74LVC646APW,112 | 9352 505 90112 | Volume production | SOT355-1
(TSSOP24) | Tube | Standard Marking | |
| 74LVC646APW | 74LVC646APW,118 | 9352 505 90118 | Volume production | SOT355-1
(TSSOP24) | Reel Pack, SMD, 13" | Standard Marking |
Quality/reliability/chemical content
| Type number | Orderable part number | Chemical content | RoHS | Leadfree Conversion date | RHF | IRF (FIT) | MTBF (hours) | MSL |
|---|---|---|---|---|---|---|---|---|
| 74LVC646AD | 74LVC646AD,112 | 74LVC646AD |
| week 13, 2005 | 3,87 | 2,58E+08 | 1 | |
| 74LVC646AD | 74LVC646AD,118 | 74LVC646AD |
| week 13, 2005 | 3,87 | 2,58E+08 | 1 | |
| 74LVC646ADB | 74LVC646ADB,112 | 74LVC646ADB |
| week 12, 2005 | 3,87 | 2,58E+08 | 1 | |
| 74LVC646ADB | 74LVC646ADB,118 | 74LVC646ADB |
| week 12, 2005 | 3,87 | 2,58E+08 | 1 | |
| 74LVC646APW | 74LVC646APW,112 | 74LVC646APW |
| week 10, 2005 | 3,87 | 2,58E+08 | 1 | |
| 74LVC646APW | 74LVC646APW,118 | 74LVC646APW |
| week 10, 2005 | 3,87 | 2,58E+08 | 1 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Orderable part number | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|---|
| 74LVC646AD | 9352 506 00112 | 74LVC646AD,112 | 0.9100 | not available | ||||||
| 74LVC646AD | 9352 506 00118 | 74LVC646AD,118 | 0.9100 | not available | ||||||
| 74LVC646ADB | 9352 505 80112 | 74LVC646ADB,112 | 0.9100 | not available | ||||||
| 74LVC646ADB | 9352 505 80118 | 74LVC646ADB,118 | 0.9100 | not available | ||||||
| 74LVC646APW | 9352 505 90112 | 74LVC646APW,112 | 0.9100 | not available | ||||||
| 74LVC646APW | 9352 505 90118 | 74LVC646APW,118 | 0.9100 | not available |
Parametrics/similar products
| Type number | Package | Description | Fmax(MHz) | Propagation Delay(ns) | Voltage | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|
| 74LVC646AD | SOT137
| 3.3V Transceiver/Register (3-State) | 250 | 3.9@3.3V | 1.2-3.6 | Low Power or Battery Applications | TTL | +/- 24 mA |
| 74LVC646ADB | SOT340-1
(SSOP24) | 3.3V Transceiver/Register (3-State) | 250 | 3.9@3.3V | 1.2-3.6 | Low Power or Battery Applications | TTL | +/- 24 mA |
| 74LVC646APW | SOT355-1
(TSSOP24) | 3.3V Transceiver/Register (3-State) | 250 | 3.9@3.3V | 1.2-3.6 | Low Power or Battery Applications | TTL | +/- 24 mA |
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