ATF1502ASL-25JU44 Atmel, ATF1502ASL-25JU44 Datasheet - Page 4

• Manufacturer Part Number: ATF1502ASL-25JU44
• Description: IC CPLD EE LP 25NS 44-PLCC
• Manufacturer: Atmel
• Series: ATF1502AS(L)r

Specifications of ATF1502ASL-25JU44

• Programmable Type: In System Programmable (min 10K program/erase cycles)
• Delay Time Tpd(1) Max: 25.0ns
• Voltage Supply - Internal: 4.5 V ~ 5.5 V
• Number Of Macrocells: 32
• Number Of I /o: 32
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Voltage: 4.75 V ~ 5.25 V
• Memory Type: EEPROM
• Family Name: ATF1502ASL
• # Macrocells: 32
• Number Of Usable Gates: 750
• Frequency (max): 60MHz
• Propagation Delay Time: 25ns
• Number Of Logic Blocks/elements: 2
• # I/os (max): 32
• Operating Supply Voltage (typ): 5V
• In System Programmable: Yes
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• Number Of Product Terms Per Macro: 40
• Maximum Operating Frequency: 60 MHz
• Delay Time: 25 ns
• Number Of Programmable I/os: 32
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• For Use With: ATF15XX-DK3 - KIT DEV FOR ATF15XX CPLD'S
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Number Of Logic Elements/cells: -
• Lead Free Status / Rohs Status: Compliant

Figure 1. ATF1502AS Macrocell
Product Terms and
Select Mux
OR/XOR/
CASCADE Logic
Flip-flop
4
ATF1502AS(L)
Each ATF1502AS macrocell has five product terms. Each product term receives as its inputs
all signals from both the global bus and regional bus.
The product term select multiplexer (PTMUX) allocates the five product terms as needed to
the macrocell logic gates and control signals. The PTMUX programming is determined by the
design compiler, which selects the optimum macrocell configuration.
The ATF1502AS’s logic structure is designed to efficiently support all types of logic. Within a
single macrocell, all the product terms can be routed to the OR gate, creating a 5-input
AND/OR sum term. With the addition of the CASIN from neighboring macrocells, this can be
expanded to as many as 40 product terms with little additional delay.
The macrocell’s XOR gate allows efficient implementation of compare and arithmetic func-
tions. One input to the XOR comes from the OR sum term. The other XOR input can be a
product term or a fixed high or low level. For combinatorial outputs, the fixed level input allows
polarity selection. For registered functions, the fixed levels allow DeMorgan minimization of
product terms. The XOR gate is also used to emulate T- and JK-type flip-flops.
The ATF1502AS’s flip-flop has very flexible data and control functions. The data input can
come from either the XOR gate, from a separate product term or directly from the I/O pin.
Selecting the separate product term allows creation of a buried registered feedback within a
combinatorial output macrocell. (This feature is automatically implemented by the fitter soft-
ware). In addition to D, T, JK and SR operation, the flip-flop can also be configured as a flow-
through latch. In this mode, data passes through when the clock is high and is latched when
the clock is low.
0995K–PLD–6/05