ATF16V8B-15JU - 15ns 8-Macrocell SPLD | Microchip Technology
Référence : ATF16V8B-15JU ✓ ActifATF16V8B-15JU Présentation
A simple programmable logic device is a user-programmed semiconductor that replaces a collection of individual gates and flip-flops with one configurable integrated circuit. In the product hierarchy, the ATF16V8B is a simple PLD, also called an SPLD, within the broader programmable-logic-device and digital-logic categories. Its electrically erasable architecture supports reusable or field-programmable logic without the mask costs associated with custom silicon.
The ATF16V8B family provides 250 logic gates, eight output macrocells, and three software-configured operating modes. Each output is allocated eight product terms, allowing the same device to implement conventional GAL16V8-style functions. A 5 V supply supports compatibility with legacy CMOS logic systems, while the 15 ns speed designation identifies the target propagation-delay class. The device also supports up to 16 inputs and 8 I/O outputs through its 20-pin PLCC package.
Technically, the ATF16V8B is designed as a direct replacement for many 16R8-family and 20-pin combinatorial PLDs. Its architecture supports eight outputs with individually allocated product terms and automatically selected operating modes, simplifying migration from GAL16V8D, ATF16V8C, and related devices. Microchip identifies the ATF16V8B and ATF16V8C families as pin-to-pin and JEDEC-fusemap-compatible replacements for GAL16V8 designs, although timing, supply, and programming details must still be checked before substitution.
Typical uses include address decoding, bus-interface translation, control-signal generation, state-machine logic, and compact peripheral glue logic in industrial, communications, and legacy computer systems. It is particularly useful when the logic design is small enough for eight macrocells but too specialized for a larger FPGA or microcontroller.
For a new board, preserve the 20-pin PLCC footprint and verify the programmed fuse map, pin assignment, supply voltage, and timing margin against the original design. Ceramic PLCC construction is also relevant to repair and obsolescence planning because the package is less common than modern plastic packages.
This product summary consolidates the device architecture, package characteristics, timing, programming considerations, and drop-in replacement guidance to support faster component evaluation and legacy-design maintenance.
Alternatives de remplacement direct pour ATF16V8B-15JU — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ATF16V8B-15JU (même facteur de forme et même empreinte) — différant par Package, Device Type, Architecture, Product Terms per Output, Maximum Inputs.
ATF16V8BQL-15JU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATF16V8C-7JU
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →ATF16V8B-10JU
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →ATF16V8CZ-15PU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
GAL16V8D-15QJ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATF16V8B-15JU Valeurs maximales et caractéristiques électriques
| Device Type | Electrically erasable simple programmable logic device (SPLD) |
| Tension d'alimentation | 5 V |
| Propagation Delay | 15 ns |
| Maximum Frequency | 62 MHz |
| Logic Gates | 250 gates |
| Macrocells | 8 macrocells |
| Maximum Inputs | 16 inputs |
| User I/O | 8 I/O pins |
| Product Terms per Output | 8 product terms per output |
| Programming Technology | Electrically erasable programmable logic |
| Architecture Compatibility | Pin-to-pin and JEDEC-fusemap compatible with GAL16V8 replacements |
| Logic Family | CMOS |
| Power Type | Standard power |
| Boîtier | 20-pin ceramic PLCC, 9 mm x 9 mm |
| Nombre de broches | 20 pins |
| Type de montage | Surface mount |
| Package Material | Ceramic |
| Green Package | Green package |
| Operating Modes | 3 automatically configured operating modes |
Guide de configuration des broches du ATF16V8B-15JU green package
Configuration des broches du ATF16V8B-15JU (boîtier green package). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour ATF16V8B-15JU.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ATF16V8B-15JU convient pour 6 applications: Legacy Address Decoding, Industrial Control and State Machines, Bus Interface and Signal Conditioning, Peripheral Card Glue Logic, Communications Equipment Control Logic, Programmable Test and Measurement Logic.
Legacy Address Decoding
The ATF16V8B-15JU is suited to compact address decoding in 5 V processor and peripheral-interface systems because it provides 8 macrocells, up to 16 inputs, and 8 I/O outputs. Eight product terms per output allow several decode functions to be consolidated into one device. Its 15 ns propagation-delay class can support older bus architectures when the decode path has adequate margin. Engineers should compare the slowest address-to-chip-select requirement with the device timing before release, and verify that the programmed fuse map reproduces the original board-level decode equations.
Recommandé
Industrial Control and State Machines
ATF16V8B-15JU can implement small state machines, sequencing logic, and discrete control functions in legacy industrial equipment. Its three automatically selected operating modes support combinational and registered structures, while eight output macrocells provide enough capacity for compact multi-state control laws. The device operates from a 5 V supply and retains a 15 ns speed class suitable for many electromechanical, relay, and legacy control paths. Validate timing against actuator feedback and interlock signals, and preserve the original output polarity and registered-output behavior in the programmed fuse map.
Recommandé
Bus Interface and Signal Conditioning
The ATF16V8B-15JU can combine decode, qualification, and simple level-conversion functions in legacy bus-interface circuitry. Its up-to-16 input capability allows address, command, and qualifier signals to participate in one Boolean network, while the eight I/O outputs support chip selects, enables, or translated control signals. Because this is a 5 V CMOS programmable logic device rather than a general-purpose transceiver, voltage-level compatibility must be established for every connected bus. Check propagation delay, output drive, setup, and hold requirements as one complete timing chain.
Recommandé
Peripheral Card Glue Logic
The ATF16V8B-15JU is a practical fit for legacy expansion-card glue logic, including address selection, interrupt-request generation, and control-signal decoding. Eight macrocells and eight product terms per output allow several related Boolean functions to share one package without changing the original 20-pin PLCC board footprint. The 15 ns class should be checked against the host bus timing, especially for combinational outputs that must meet chip-select or interrupt setup requirements. Reprogram and verify the fuse map whenever the card is used in a system with different bus timing.
Recommandé
Communications Equipment Control Logic
ATF16V8B-15JU can implement legacy communications-equipment functions such as command decoding, modem-control sequencing, status multiplexing, and alarm generation. Its 5 V CMOS architecture and configurable operating modes support both combinational and registered logic, while the 15 ns speed class can serve many established control paths. Keep timing margins in mind for cascaded decode functions, and test all programmed modes in the intended power-up sequence. The ceramic PLCC package is particularly relevant when repairing or extending older communications equipment with an existing PLCC footprint.
Recommandé
Programmable Test and Measurement Logic
The ATF16V8B-15JU can consolidate fixed control sequences, limit comparisons, and fixture-routing commands in legacy test systems. Eight macrocells are useful for creating deterministic control patterns or coordinating measurement steps, and the device supports up to 16 inputs for combining stimulus and status signals. Timing must be compared with instrument handshake and relay-control delays, including any pulse-width constraints in the surrounding circuit. For production use, program and verify each unit, document the fuse map, and confirm that the ceramic PLCC package matches the assembly method used by the fixture.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ATF16V8B-15JU — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ATF16V8BQL-15JU | ATF16V8C-7JU | ATF16V8B-10JU | ATF16V8CZ-15PU | GAL16V8D-15QJ |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Lattice Semiconductor |
| Package | 20-pin ceramic PLCC (9x9 mm) | 20-pin ceramic PLCC (9x9 mm) | 20-pin ceramic PLCC (9x9 mm) | 20-pin ceramic PLCC (9x9 mm) | 20-pin ceramic PLCC (9x9 mm) | 20-pin ceramic PLCC (9x9 mm) |
| Propagation Delay | 15 ns | 15 ns | 7.5 ns | 10 ns | 15 ns | 15 ns |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Macrocells | 8 macrocells | 8 macrocells | 8 macrocells | 8 macrocells | 8 macrocells | 8 macrocells |
| Maximum Inputs | 16 inputs | 16 inputs | 16 inputs | 16 inputs | 16 inputs | 16 inputs |
| User I/O | 8 I/O pins | 8 I/O pins | 8 I/O pins | 8 I/O pins | 8 I/O pins | 8 I/O pins |
| Programmable Architecture | Electrically erasable SPLD | Electrically erasable SPLD | Electrically erasable SPLD | Electrically erasable SPLD | Zero-power electrically erasable SPLD | JEDEC-fusemap-compatible SPLD |
Principaux différenciateurs
- Same 15 ns timing class in the closest ATF16V8B alternative (vs ATF16V8BQL-15JU)
- Higher timing margin from the ATF16V8C speed class (vs ATF16V8C-7JU)
- Established 5 V GAL16V8 replacement path (vs GAL16V8D-15QJ)
Notes de conception
Treat the ATF16V8B-15JU and GAL16V8D as related but not automatically identical. Before replacing a programmed device, archive the fuse map, confirm JEDEC-fusemap compatibility, verify active-high versus active-low configuration pins, and check output timing and supply current. The 15 ns suffix identifies a speed class, not the fuse configuration. A device can be electrically compatible and still behave incorrectly if the original board depends on a product-term, feedback, or registered-output arrangement that differs between implementations.
Maintain the existing 20-pin PLCC footprint, including lead pitch, body size, and orientation, because the ATF16V8B-15JU is supplied in a ceramic 9 mm by 9 mm PLCC package. Inspect sockets and exposed pads for corrosion, bent leads, and insufficient solder-joint fillets before installation. Use the manufacturer package drawing to confirm lead geometry and keep conductive debris out of the socket. For programmed replacement parts, label the device and fuse-map revision to prevent an otherwise compatible device with the wrong configuration from entering service.
Check the complete combinational path rather than comparing only the nominal 15 ns device speed. Eight product terms per output and cascaded Boolean terms can increase the actual transition delay beyond a simple gate comparison. Use the manufacturer AC characteristics to evaluate setup, hold, and recovery requirements for any registered outputs. The faster ATF16V8C-7JU may improve margin, but replacing a timing-critical part without checking edge rates, load capacitance, and output behavior can introduce ringing or unintended transitions.
Design the 5 V supply path for both normal operation and programming mode, including the voltage and current requirements of the programmer fixture. Place the device close enough to its bypass capacitors that the PLCC power and ground connections experience minimal trace impedance. Compare quiescent and active current across every alternative before substitution, especially when moving from a standard-power ATF16V8B device to a zero-power ATF16V8CZ implementation. Confirm that power-up and power-down sequencing does not place an undefined configuration on sensitive control outputs.
Informations de conformité
Microchip identifies the ATF16V8B family as a green package, but the exact RoHS, REACH, lead-free, halogen-free, conflict-minerals, and automotive qualification declarations for the ATF16V8B-15JU suffix were not identified. AEC-Q100 qualification is not stated for this part.
