2–36
Chapter 2: MAX V Architecture
Document Revision History
Table 2–8. MultiVolt I/O Support in MAX V Devices (Part 2 of 2) (Note 1)
Input Signal
VCCIO (V)
Output Signal
5.0 V 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V
1.2 V
1.5 V 1.8 V 2.5 V 3.3 V
—
—
—
v (4)
v
v (5) v (6) v (6) v (6) v (6)
v
v (7)
3.3
Notes to Table 2–8:
(1) To drive inputs higher than VCCIO but less than 4.0 V including the overshoot, disable the I/O clamp diode. However, to drive 5.0-V signals to
the device, enable the I/O clamp diode to prevent VI from rising above 4.0 V. Use an external diode if the I/O pin does not support the clamp
diode.
(2) When VCCIO = 1.8 V, a MAX V device can drive a 1.2-V or 1.5-V device with 1.8-V tolerant inputs.
(3) When VCCIO = 2.5 V, a MAX V device can drive a 1.2-V, 1.5-V, or 1.8-V device with 2.5-V tolerant inputs.
(4) When VCCIO = 3.3 V and a 2.5-V input signal feeds an input pin, the VCCIO supply current will be slightly larger than expected.
(5) MAX V devices can be 5.0-Vtolerant with the use of an external resistor and the internal I/Oclamp diode on the 5M1270Z and 5M2210Z devices.
Use an external clamp diode if the internal clamp diode is not available.
(6) When VCCIO = 3.3 V, a MAX V device can drive a 1.2-V, 1.5-V, 1.8-V, or 2.5-V device with 3.3-V tolerant inputs.
(7) When VCCIO = 3.3 V, a MAX V device can drive a device with 5.0-V TTL inputs but not 5.0-V CMOS inputs. For 5.0-V CMOS, open-drain setting
with internal I/O clamp diode (available only on 5M1270Z and 5M2210Z devices) and external resistor is required. Use an external clamp diode
if the internal clamp diode is not available.
Document Revision History
Table 2–9 lists the revision history for this chapter.
Table 2–9. Document Revision History
Date
Version
Changes
December 2010
1.0
Initial release.
MAX V Device Handbook
December 2010 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
