5M1270ZT144C4N Altera, 5M1270ZT144C4N Datasheet - Page 91

• Manufacturer Part Number: 5M1270ZT144C4N
• Description: ALTERA
• Manufacturer: Altera
• Series: MAX® Vr

Specifications of 5M1270ZT144C4N

• Programmable Type: In System Programmable
• Delay Time Tpd(1) Max: 6.2ns
• Voltage Supply - Internal: 1.71 V ~ 1.89 V
• Number Of Logic Elements/blocks: 1270
• Number Of Macrocells: 980
• Number Of Gates: -
• Number Of I /o: 114
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Lead Free Status / Rohs Status: Vendor undefined / RoHS Compliant

Chapter 5: Using MAX V Devices in Multi-Voltage Systems
5.0-V Device Compatibility
December 2010 Altera Corporation
f
Table 5–1. 3.3-V LVTTL/LVCMOS Programmable Drive Strength (Part 2 of 2)
To compute the required value of R
transistors on the MAX V device. You can model this output resistor (R
dividing V
LVTTL/LVCMOS I/O standard for MAX V devices.
For more information about I/O standard specifications, refer to the
Characteristics for MAX V Devices
Table 5–2. 3.3-V LVTTL/LVCMOS Maximum V
Select R
compute the required pull-up resistor value of R
R
with a 16 mA drive strength, given that the maximum power supply (V
you can calculate the value of R
Equation 5–1.
This resistor value computation assumes worst-case conditions. You can adjust the
R
system does not see a wide variation in voltage-supply levels, you can adjust these
calculations accordingly.
Because MAX V devices are 3.3-V, 32-bit, 66-MHz PCI compliant, the input circuitry
accepts a maximum high-level input voltage (V
with a 5.0-V device, you must connect a resistor (R
the 5.0-V device.
3.3-V LVCMOS
3.3-V LVTTL
3.3-V LVCMOS
EXT
EXT
= (V
value according to the device configuration drive strength. Additionally, if your
EXT
CC
OL
so that the MAX V device’s I
/I
by I
OL
I/O Standard
I/O Standard
) – R
OL
(R
INT
EXT
. For example, if an I/O pin is configured as a 3.3-V LVTTL
= V
R
EX T
OL
EXT
/I
=
chapter.
OL

---------------------------------------- -
as follows:
EXT
5.5 V 0.45 V
).
Table 5–2
, first calculate the model of the open-drain
16 mA
OL
OL
–
specification is not violated. You can
IH
lists the maximum V

EXT
I
OH
) of 4.0 V. To drive a MAX V device
=
2
/I
) between the MAX V device and
315.6 
OL
by using the equation:
Current Strength Setting (mA)
Voltage (V)
0.45
0.20
8
4
MAX V Device Handbook
DC and Switching
OL
EXT
for the 3.3-V
CC
) is 5.5 V,
) by
5–5