Cypress CY8C21234 Manual De Usuario

Document Number: 38-12025  Rev. *O

Page 20 of 45

DC General Purpose IO Specifications
The following tables list the guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V

and -40°C 

≤ T

A

 

≤ 85°C, 3.0V to 3.6V and -40°C ≤ T

A

 

≤ 85°C, or 2.4V to 3.0V and -40°C ≤ T

A

 

≤ 85°C, respectively. Typical parameters

apply to 5V, 3.3V, and 2.7V at 25°C and are for design guidance only. 

I

SB27

Sleep (Mode) Current with POR, LVD, Sleep 

Timer, WDT, and internal slow oscillator active. 

Mid temperature range.

–

2.6

4.

μA

Vdd = 2.55V, 0

o

C 

≤ T

A

 

≤ 40

o

C.

I

SB

Sleep (Mode) Current with POR, LVD, Sleep 

Timer, WDT, and internal slow oscillator active.

–

2.8

5

μA

Vdd = 3.3V, -40

o

C 

≤ T

A

 

≤ 85

o

C.

V

REF

Reference Voltage (Bandgap)

1.28

1.30

1.32

V

Trimmed for appropriate Vdd. 

Vdd = 3.0V to 5.25V.

V

REF27

Reference Voltage (Bandgap)

1.16

1.30

1.33

V

Trimmed for appropriate Vdd. Vdd = 

2.4V to 3.0V.

AGND

Analog Ground

V

REF 

- 0.003

V

REF

V

REF

+ 0.003

V

Table 14.  DC Chip-Level Specifications  (continued)

R

PU

Pull up Resistor

4

5.6

8

k

Ω

R

PD

Pull down Resistor

4

5.6

8

k

Ω

V

OH

High Output Level

Vdd - 

1.0

–

–

V

IOH = 10 mA, Vdd = 4.75 to 5.25V (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

IOL = 25 mA, Vdd = 4.75 to 5.25V (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

IL

Input Low Level

–

–

0.8

V

Vdd = 3.0 to 5.25.

V

IH

Input High Level

2.1

–

V

Vdd = 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. 

Temp = 25

o

C.

C

OUT

Capacitive Load on Pins as Output

–

3.5

10

pF

Package and pin dependent. 

Temp = 25

o

C.

R

PU

Pull up Resistor

4

5.6

8

k

Ω

R

PD

Pull down Resistor

4

5.6

8

k

Ω

V

OH

High Output Level

Vdd - 

0.4

–

–

V

IOH = 2.5 mA (6.25 Typ), Vdd = 2.4 

to 3.0V (16 mA maximum, 50 mA Typ 

combined IOH budget).

V

OL

Low Output Level

–

–

0.75

V

IOL = 10 mA, Vdd = 2.4 to 3.0V (90 

mA maximum combined IOL 

budget).

V

IL

Input Low Level

–

–

0.75

V

Vdd = 2.4 to 3.0.