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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Description Price Maximum Internal Frequency Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage Maximum Operating Temperature Minimum Operating Supply Voltage Minimum Operating Temperature Mounting Type
RS Stock No. 545-8707
Mfr. Part No.EPCS4SI8N
BrandAltera
SGD24.27
Each
units
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. 626-0983
Mfr. Part No.XCF32PFSG48C
BrandXilinx
SGD103.06
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- TFBGA 48 9 x 8 x 0.86mm 9mm 8mm 0.86mm 2 V +85 °C 1.65 V -40 °C Surface Mount
RS Stock No. 173-2096
Mfr. Part No.XCF32PFSG48C
BrandXilinx
SGD92.702
Each (In a Tray of 108)
units
- TFBGA 48 9 x 8 x 0.86mm 9mm 8mm 0.86mm 2 V +85 °C 1.65 V -40 °C Surface Mount
RS Stock No. 169-5521
Mfr. Part No.EPCS64SI16N
BrandAltera
SGD91.072
Each (In a Tube of 49)
units
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
RS Stock No. 690-4400
Mfr. Part No.EPCS16SI8N
BrandAltera
SGD27.71
Each
units
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. 173-2054
Mfr. Part No.XCF01SVOG20C
BrandXilinx
SGD11.21
Each (In a Tray of 74)
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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
RS Stock No. 545-8971
Mfr. Part No.EPC1LC20N
BrandAltera
SGD19.53
Each
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16.7MHz PLCC 20 8.97 x 8.97 x 3.81mm 8.97mm 8.97mm 3.81mm 5.25 V +70 °C 3 V 0 °C Surface Mount
RS Stock No. 626-0949
Mfr. Part No.XCF01SVOG20C
BrandXilinx
SGD12.59
Each
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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
RS Stock No. 697-3496
Mfr. Part No.XCF04SVOG20C
BrandXilinx
SGD29.07
Each
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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
RS Stock No. 173-2061
Mfr. Part No.XCF04SVOG20C
BrandXilinx
SGD24.247
Each (In a Tray of 74)
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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
RS Stock No. 697-3301
Mfr. Part No.XCF32PVOG48C
BrandXilinx
SGD102.90
Each
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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. 169-5485
Mfr. Part No.EPC2TC32N
BrandAltera
SGD59.398
Each (In a Tray of 250)
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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
RS Stock No. 697-3490
Mfr. Part No.XCF08PVOG48C
BrandXilinx
SGD47.22
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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. 169-5504
Mfr. Part No.EPC8QI100N
BrandAltera
SGD140.213
Each (In a Tray of 66)
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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
RS Stock No. 697-3493
Mfr. Part No.XCF02SVOG20C
BrandXilinx
SGD16.94
Each
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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
RS Stock No. 173-2068
Mfr. Part No.XCF08PVOG48C
BrandXilinx
SGD42.653
Each (In a Tray of 96)
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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. 626-0955
Mfr. Part No.XCF02SVOG20C
BrandXilinx
SGD17.82
Each
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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
RS Stock No. 169-5505
Mfr. Part No.EPCS1SI8N
BrandAltera
SGD9.199
Each (In a Tube of 100)
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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. 173-2057
Mfr. Part No.XCF02SVOG20C
BrandXilinx
SGD14.646
Each (In a Tray of 74)
units
- 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
RS Stock No. 545-9160
Mfr. Part No.EPC8QI100N
BrandAltera
SGD92.86
Each
units
- 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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