ATF1504BE-5AX100 Atmel, ATF1504BE-5AX100 Datasheet - Page 8
ATF1504BE-5AX100
Manufacturer Part Number
ATF1504BE-5AX100
Description
IC CPLD 64MC 1.8V 100-TQFP
Manufacturer
Atmel
Series
ATF1504BEr
Datasheet
1.ATF1504BE-7AU44.pdf
(30 pages)
Specifications of ATF1504BE-5AX100
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
64
Number Of I /o
80
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-TQFP, 100-VQFP
Features
CMOS/TTL Compatible
Voltage
1.8V
Memory Type
CMOS
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. Input and I/O Pins
2.1
8
Programmable Pin-keeper Option for Inputs and I/Os
ATF1504BE
The ATF1504BE offers the option of individually 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 undriven input and
I/O lines from floating to intermediate voltage levels, which causes unnecessary power con-
sumption and system 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
V
CCIO
V
CCINT
50K
50K
Figure 2-2
V
CCINT
shows the same for an
3637B–PLD–1/08