EP3C5F256C8 Datasheet, PDF (9/34 Pages) Altera Corporation – 1. Cyclone III Device Datasheet

Chapter 1: Cyclone III Device Datasheet
1–9
Electrical Characteristics
Internal Weak Pull-Up and Weak Pull-Down Resistor
Table 1–10 lists the weak pull-up and pull-down resistor values for Cyclone III
devices.
Table 1–10. Cyclone III Devices Internal Weak Pull-Up and Weak Pull-Down Resistor ⁽¹⁾
Symbol
Parameter
Conditions
Min Typ Max Unit
V_CCIO = 3.3 V ± 5% ^{(2), (3)}
Value of I/O pin pull-up resistor before ^{VCCIO = 3.0 V ± 5% (2), (3)}
R_{_PU}
and during configuration, as well as
user mode if the programmable
V_CCIO = 2.5 V ± 5% ^{(2), (3)}
V_CCIO = 1.8 V ± 5% ^{(2), (3)}
pull-up resistor option is enabled
V_CCIO = 1.5 V ± 5% ^{(2), (3)}
V_CCIO = 1.2 V ± 5% ^{(2), (3)}
V_CCIO = 3.3 V ± 5% ⁽⁴⁾
V_CCIO = 3.0 V ± 5% ⁽⁴⁾
R_{_PD}
Value of I/O pin pull-down resistor
before and during configuration
V_CCIO = 2.5 V ± 5% ⁽⁴⁾
V_CCIO = 1.8 V ± 5% ⁽⁴⁾
V_CCIO = 1.5 V ± 5% ⁽⁴⁾
7
25 41 k
7
28 47 k
8
35 61 k
10 57 108 k
13 82 163 k
19 143 351 k
6
19 30 k
6
22 36 k
6
25 43 k
7
35 71 k
8
50 112 k
Notes to Table 1–10:
(1) All I/O pins have an option to enable weak pull-up except configuration, test, and JTAG pin. Weak pull-down feature is only available for JTAG
TCK.
(2) Pin pull-up resistance values may be lower if an external source drives the pin higher than V_CCIO.
(3) R_{_PU} = (V_CCIO – V_I)/I_{R_PU}
Minimum condition: –40°C; V_CCIO = V_CC + 5%, V_I = V_CC + 5% – 50 mV;
Typical condition: 25°C; V_CCIO = V_CC, V_I = 0 V;
Maximum condition: 125°C; V_CCIO = V_CC – 5%, V_I = 0 V; in which V_I refers to the input voltage at the I/O pin.
(4) R_{_PD} = V_I/I_{R_PD}
Minimum condition: –40°C; V_CCIO = V_CC + 5%, V_I = 50 mV;
Typical condition: 25°C; V_CCIO = V_CC, V_I = V_CC – 5%;
Maximum condition: 125°C; V_CCIO = V_CC – 5%, V_I = V_CC – 5%; in which V_I refers to the input voltage at the I/O pin.
Hot Socketing
Table 1–11 lists the hot-socketing specifications for Cyclone III devices.
Table 1–11. Cyclone III Devices Hot-Socketing Specifications
Symbol
Parameter
Maximum
I_IOPIN(DC)
I_IOPIN(AC)
DC current per I/O pin
AC current per I/O pin
300 A
8 mA ⁽¹⁾
Note to Table 1–11:
(1) The I/O ramp rate is 10 ns or more. For ramp rates faster than 10 ns, |IIOPIN| = C
dv/dt, in which C is I/O pin capacitance and dv/dt is the slew rate.
July 2012 Altera Corporation
Cyclone III Device Handbook
Volume 2