Datasheet
CY8C21634, CY8C21534, CY8C21434
CY8C21334, CY8C21234
Document Number: 38-12025 Rev. AB Page 20 of 53
DC General-Purpose I/O Specifications
The following tables list the guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75 V to
5.25 V and –40 °C T
A
85 °C, 3.0 V to 3.6 V and –40 °C T
A
85 °C, or 2.4 V to 3.0 V and –40 °C T
A
85 °C, respectively.
Typical parameters are measured at 5 V, 3.3 V, and 2.7 V at 25 °C and are for design guidance only.
Table 6. 5-V and 3.3-V DC GPIO Specifications
Symbol Description Min Typ Max Units Notes
R
PU
Pull-up resistor 4 5.6 8 k
R
PD
Pull-down resistor 4 5.6 8 k
V
OH
High output level V
DD
– 1.0 – – V I
OH
= 10 mA, V
DD
= 4.75 to 5.25 V
(8 total loads, 4 on even port pins (for
example, P0[2], P1[4]), 4 on odd port
pins (for example, P0[3], P1[5])
V
OL
Low output level – – 0.75 V I
OL
= 25 mA, V
DD
= 4.75 to 5.25 V
(8 total loads, 4 on even port pins (for
example, P0[2], P1[4]), 4 on odd port
pins (for example, P0[3], P1[5]))
I
OH
High level source current 10 – – mA V
OH
= V
DD
– 1.0 V, see the limitations
of the total current in the note for V
OH
I
OL
Low level sink current 25 – – mA V
OL
= 0.75 V, see the limitations of the
total current in the note for V
OL
V
IL
Input low level – – 0.8 V V
DD
= 3.0 to 5.25
V
IH
Input high level 2.1 – V V
DD
= 3.0 to 5.25
V
H
Input hysteresis – 60 – mV
I
IL
Input leakage (absolute value) – 1 – nA Gross tested to 1 µA
C
IN
Capacitive load on pins as input – 3.5 10 pF Package and pin dependent
Tem p = 2 5 ° C
C
OUT
Capacitive load on pins as output – 3.5 10 pF Package and pin dependent
Tem p = 2 5 ° C
Table 7. 2.7-V DC GPIO Specifications
Symbol Description Min Typ Max Units Notes
R
PU
Pull-up resistor 4 5.6 8 k
R
PD
Pull-down resistor 4 5.6 8 k
V
OH
High output level V
DD
– 0.4 – – V I
OH
= 2.5 mA (6.25 Typ), V
DD
= 2.4 to
3.0 V (16 mA maximum, 50 mA Typ
combined I
OH
budget)
V
OL
Low output level – – 0.75 V I
OL
= 10 mA, V
DD
= 2.4 to 3.0 V (90 mA
maximum combined I
OL
budget)
I
OH
High level source current 2.5 – – mA V
OH
= V
DD
– 0.4 V, see the limitations
of the total current in the note for V
OH
I
OL
Low level sink current 10 – – mA V
OL
= 0.75 V, see the limitations of the
total current in the note for V
OL
V
IL
Input low level – – 0.75 V V
DD
= 2.4 to 3.0
V
IH
Input high level 2.0 – – V V
DD
= 2.4 to 3.0
V
H
Input hysteresis – 90 – mV
I
IL
Input leakage (absolute value) – 1 – nA Gross tested to 1 µA
C
IN
Capacitive load on pins as input – 3.5 10 pF Package and pin dependent
Tem p = 2 5 ° C
C
OUT
Capacitive load on pins as output – 3.5 10 pF Package and pin dependent
Tem p = 2 5 ° C