ATF20V8BQL-15JI

Overview

The ATF20V8BQL-15JI is a high-performance Electrically Erasable Programmable Logic Device (EEPLD) manufactured by Microchip Technology. It utilizes advanced Flash memory technology to provide reprogrammability with 100 erase/write cycles and 20-year data retention. The device features 28 pins in a Plastic J-leaded Chip Carrier (PLCC) package, offering eight macrocells with dedicated product terms. Key electrical specifications include a maximum propagation delay of 15 ns, an operating voltage range of 4.5 V to 5.5 V, and low power consumption with a standby current of 5 mA and active current of 20 mA. It supports industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Advanced Flash Technology: Reprogrammable with 100 erase/write cycles and 20-year data retention.
• Low Power Consumption: Standby current of 5 mA and active current of 20 mA for the BQL variant.
• High Reliability: 2,000V ESD protection and 200 mA latchup immunity.
• Flexible Architecture: Emulates many 24-pin PALs with three configurable modes (Registered, Complex, Simple).

Applications

• Direct replacement for 20R8 family and most 24-pin combinatorial PLDs.
• State machine initialization requiring registered outputs with power-up reset.
• Logic functions requiring CMOS and TTL compatible inputs and outputs.

Procurement Notes

Verify the ordering code matches the specific speed grade (-15), package type (28J for PLCC), and temperature range (I for Industrial). Confirm RoHS compliance status if required, as standard packages may differ from Green Package options. Check for obsolete part status or last-time buy dates associated with older revisions of the datasheet.

Selection Notes

Select the ATF20V8BQL variant for applications requiring lower power dissipation compared to the standard ATF20V8B or ATF20V8BQ. Ensure the design accommodates the 15 ns propagation delay and 12 ns setup time. Verify that the 28-lead PLCC package fits the PCB footprint constraints and that the industrial temperature range meets environmental requirements.

Part Context

The ATF20V8BQL-15JI belongs to the ATF20V8B family of EEPLDs. This family provides a superset of generic architectures to replace legacy PAL devices. The 'QL' suffix indicates the low-power Flash variant, while '15' denotes the 15 ns speed grade, and 'JI' specifies the Industrial temperature range and PLCC package.

Replacement Considerations

The device can directly replace 20R8, 20RP8, 20R6, 20RP6, 20R4, and 20RP4 devices when configured in Registered Mode. It also emulates 20L8, 20H8, and 20P8 in Complex Mode, and various simple PALs like 14L8, 16L6, and 18L4 in Simple Mode.

FAQ

What are the three operational modes of the ATF20V8B?

The three modes are Registered Mode (for registered outputs/I/Os), Complex Mode (for combinatorial outputs/I/Os with OE control), and Simple Mode (for combinatorial outputs without OE control).

How does the power supply voltage tolerance differ between commercial and industrial ranges?

For commercial temperature ranges, the VCC power supply is specified at 5V ± 5%. For industrial temperature ranges, it is specified at 5V ± 10%.

What is the function of the internal pull-up resistors?

Internal input and I/O pull-up resistors ensure that logic array inputs float to VCC when not driven externally, maintaining known states.