CY25823

Document Number: 38-07579 Rev. *D

Page 9 of 15

CLKOUT/CLKOUT# Enable Clarification

The CLKOUT enable I2C register bit (Byte1, bit2) is used to

enable/disable the CLKOUT clock. The PLL and crystal oscillator

remains on when the outputs are disabled.

When CLKOUT is disabled, the disabled clock is three-stated.

The transition to this mode (three-state) is glitch free. Similarly,

when CLKOUT is enabled the clock starts in a predictable

manner without any glitches or abnormal behavior.

Current Reference, IREF

The details of the current reference circuit are shown in Figure 4.

The operational amplifier in the current reference circuit drives

inputs of the amplifier. Thus the reference current is established

according to the following formula:

voltage.

Absolute Maximum Conditions

Parameter

Description

Condition

Min.

Max.

Unit

Core Supply Voltage

–0.5

4.6

V

Analog Supply Voltage

–0.5

4.6

V

Input Voltage

–0.5

VDC

Temperature, Storage

Non-functional

–65

150

°C

Temperature, Operating Ambient

Functional

0

70

°C

Temperature, Junction

Functional

–

150

°C

Dissipation, Junction to Case

Mil-Spec 883E Method 1012.1

–

33.89

°C/W

Dissipation, Junction to Ambient

JEDEC (JESD 51)

–

117.36

°C/W

ESD Protection (Human Body Model)

MIL-STD-883, Method 3015

2000

–

V

DC Electrical Specifications

Parameter

Description

Condition

Min.

Max.

Unit

VDD

Power supply for logic and outputs

3.3 ± 5%

3.135

3.465

V

VDDA

Power supply for PLL

3.3 ± 5%

3.135

3.465

V

Input Low Voltage

SDATA, SCLK

0.8

V

Input High Voltage

SDATA, SCLK

2.0

V

Input Low Voltage

0.8

V

Input High Voltage

2.0

V

Input Leakage Current

except internal pull-ups

–5

5

μA

High-impedance Output Current

–10

10

μA

Dynamic Supply Current

without output load

–

50

mA

Total Power Supply Current in Shutdown

mode (No Input Clock)

Shutdown active

–

250

μA

Input Pin Capacitance

2

5

pF

Output Pin Capacitance

3

6

pF

Input Pin Inductance

–

5

nH

SCLK and SDATA pull-up resistors

when PWRDWN = 1

50

200

k

Ω

1% tolerance

200

500

W

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