Programmable Array Logic Circuits

What is a programmable array logic circuit (PAL)?


Programmable array logic (PAL) are semiconductors that are used to implement combinational logic circuits. They have a programmable AND gate array with fixed OR gate array. PAL’s contain PROM (programmable read only memory) and output logic. PAL is a group of PLD (programmable logic device). They’re also faster due to only having a single programmable array.


Features & Benefits


Programmable array logic is typically cheaper to produce & buy rather than the conventional programmable logic array (PLA). Compared to other programmable logic devices (PLD) they typically have higher efficiency, high reliability with only 1 programmable gate, less power consumption and more secure.


With the PAL being easier to program than a PLA there are multiple languages to program PALs in. These include PAL assembler (PALASM), Advanced Boolean expression language (ABEL) and universal programmable logic (CUPL). Programming PAL is very similar to PLA programming, except only the AND gate array needs to be programmed on the PAL.


How does a PAL differ from a PLA?


A PLA (Programmable Logic Array) has both an AND array gate and an OR gate array both available to be programmed, whereas PAL only allows the AND array to be programmed. Other differences include that PLA is slower, less efficient on power consumption and less prolific.


Typical applications


Programmable array logic circuits are typically used in a FPGA (Field Programmable Gate Array). This allows for accelerated testing of systems through programs such as Xilinx.


With the PAL being arranged in a FPGA you can compile test & edit very quickly compared to other arrangements.


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RS Stock No. 697-3301
Mfr. Part No.XCF32PVOG48C
BrandXilinx
PHP2,677.86
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Mfr. Part No.XCF02SVOG20C
BrandXilinx
PHP423.328
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Mfr. Part No.XCF02SVOG20C
BrandXilinx
PHP685.14
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Mfr. Part No.XCF02SVOG20C
BrandXilinx
PHP433.76
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Mfr. Part No.EPCS16SI8N
BrandAltera
PHP989.60
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20MHz SOIC 8 4.9 x 3.9 x 1.65mm 4.9mm 3.9mm 1.65mm 3.6 V +85 °C 2.7 V -40 °C Surface Mount
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Mfr. Part No.EPCS4SI8N
BrandAltera
PHP899.64
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20MHz SOIC 8 4.9 x 3.9 x 1.65mm 4.9mm 3.9mm 1.65mm 3.6 V +85 °C 2.7 V -40 °C Surface Mount
RS Stock No. 169-5485
Mfr. Part No.EPC2TC32N
BrandAltera
PHP1,944.88
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16.7MHz TQFP 32 7 x 7 x 1mm 7mm 7mm 1mm 5.25 V +70 °C 3 V 0 °C Surface Mount
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Mfr. Part No.XCF04SVOG20C
BrandXilinx
PHP709.18
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Mfr. Part No.XCF32PFSG48C
BrandXilinx
PHP4,251.63
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Mfr. Part No.EPCS64SI16N
BrandAltera
PHP2,981.98
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20MHz SOIC 16 10.3 x 7.5 x 2.55mm 10.3mm 7.5mm 2.55mm 3.6 V +85 °C 2.7 V -40 °C Surface Mount
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Mfr. Part No.EPC8QI100N
BrandAltera
PHP3,395.62
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Mfr. Part No.XCF08PFSG48C
BrandXilinx
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BrandAltera
PHP4,591.061
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- PQFP 100 20 x 14 x 2.7mm 20mm 14mm 2.7mm 3.6 V +85 °C 3 V -40 °C Surface Mount
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Mfr. Part No.XCF08PVOG48C
BrandXilinx
PHP1,909.81
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- TSOP 48 12.1 x 18.5 x 1mm 12.1mm 18.5mm 1mm 2 V +85 °C 1.65 V -40 °C Surface Mount
RS Stock No. 169-5505
Mfr. Part No.EPCS1SI8N
BrandAltera
PHP301.21
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20MHz SOIC 8 4.9 x 3.9 x 1.65mm 4.9mm 3.9mm 1.65mm 3.6 V +85 °C 2.7 V -40 °C Surface Mount
RS Stock No. 173-2061
Mfr. Part No.XCF04SVOG20C
BrandXilinx
PHP693.63
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- TSSOP 20 6.5 x 4.39 x 1.04mm 6.5mm 4.39mm 1.04mm 3.6 V +85 °C 3 V -40 °C Surface Mount
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