ATF1502BE-5AX44 Atmel, ATF1502BE-5AX44 Datasheet - Page 6
ATF1502BE-5AX44
Manufacturer Part Number
ATF1502BE-5AX44
Description
IC CPLD 64MC 1.8V 44-TQFP
Manufacturer
Atmel
Series
ATF1502BEr
Datasheet
1.ATF1502BE-7AU44.pdf
(24 pages)
Specifications of ATF1502BE-5AX44
Programmable Type
In System Programmable (min 10K program/erase cycles)
Delay Time Tpd(1) Max
7.0ns
Voltage Supply - Internal
1.7 V ~ 1.9 V
Number Of Macrocells
32
Number Of I /o
32
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
44-TQFP, 44-VQFP
Features
CMOS/TTL Compatible
Voltage
1.8V
Memory Type
EEPROM
For Use With
ATF15XX-DK3 - KIT DEV FOR ATF15XX CPLD'S
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Logic Elements/cells
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
2. Programmable Pin-keeper Option for Inputs and I/Os
6
ATF1502BE
The ATF1502BE offers the option of programming each of its input or I/O pin so that pin-keeper
circuit can be utilized. When any pin is driven high or low and then subsequently left floating, it
will stay at that previous high or low level. This circuitry prevents unused input and I/O lines from
floating to intermediate voltage levels, which causes unnecessary power consumption and sys-
tem noise. The keeper circuits eliminate the need for external pull-up resistors and eliminate
their DC power consumption.
Figure 2-1
I/O pin. The pin-keeper circuit is a weak feedback latch and has an effective resistance that is
approximately 50 kΩ.
Figure 2-1.
Figure 2-2.
shows the pin-keeper circuit for an Input Pin and
Input with Programmable Pin-keeper
I/O with Programmable Pin-keeper
50K
Figure 2-2
50K
shows the same for an
3492A–PLD–12/05