5M1270ZT144C4N Altera, 5M1270ZT144C4N Datasheet - Page 92

• 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

5–6
MAX V Device Handbook
Figure 5–4
Figure 5–4. Driving a MAX V PCI-Compliant Device with a 5.0-V Device
If V
voltage at point B in
limits when the trace voltage exceeds 4.0 V. To limit large current draw from the 5.0-V
device, R
does not violate the high-level output current (I
driving the trace.
To compute the required value of R
transistors on the 5.0-V device. You can model this output resistor (R
5.0-V device supply voltage (V
Figure 5–5
Figure 5–5. Output Drive Characteristics of a 5.0-V Device
Note to
(1) This diode is only active after power-up. MAX V devices require an external diode if driven by 5.0 V before
CCIO
power-up.
Model as R
Figure
for the MAX V devices is 3.3 V and you enabled the I/O clamp diode, the
5.0 V ± 0.5 V
2
must be small enough for a fast signal rise time and large enough so that it
shows how to drive a MAX V PCI-compliant device with a 5.0-V device.
shows an example of typical output drive characteristics of a 5.0 V device.
5–4:
5.0-V Device
1
Figure 5–4
Typical
Output
Current (mA)
V
CC
I
O
I
CC
135
150
is 4.0 V, which meets the MAX V devices reliability
120
90
60
30
) by I
2
, first calculate the model of the pull-up
OH
R
1
V
2
: R
O
Chapter 5: Using MAX V Devices in Multi-Voltage Systems
Output Voltage (V)
1
= V
2
V
V
CCINT
OH
CCIO
CC
PCI Clamp
I
OH
) specifications of the devices
/I
I
OL
3
= 5.0 V
= 5.0 V
OH
I
.
4
V
MAX V Device
CCIO
B
December 2010 Altera Corporation
(1)
5
3.3 V
5.0-V Device Compatibility
1
) by dividing the
V
CCIO