CY2048WAF

Absolute Maximum Conditions

(Above which the useful life may be impaired. For user guidelines, not tested.)

Supply Voltage (VDD)

........................................–0.5 to +7.0V

DC Input Voltage

–0.5V to VDD + 0.5

Output Short Circuit Current

± 50 mA

Storage Temperature (Non-condensing) ....

–55°C to +125°C

Junction Temperature

–40°C to +125°C

Data Retention @ Tj = 125°C

> 10 years

ESD (Human Body Model) MIL-STD-883

> 2000V

Crystal Specifications[1]

Parameter

Description

Comments

Min.

Typ.

Max.

Unit

FNOM

Nominal crystal frequency

Fundamental mode, AT cut

10

–

48

MHz

R1

Equivalent series resistance (ESR)

Fundamental mode

–

–

40

Ω

R3/R1

Ratio of third overtone mode ESR to

Ratio used because typical R1 values are

4.5

–

–

–

 

fundamental mode ESR

much less than the maximum spec

 

 

 

 

C0

Crystal shunt capacitance

 

–

–

5

pF

C1

Crystal motional capacitance

 

2

–

–

fF

Operating Conditions

 

 

 

 

 

Parameter

Description

Min.

Typ.

Max.

Unit

VDD

Operating Voltage

2.7

–

3.6

V

TJ

Junction Temperature

–40

–

125

°C

CXIN

Capacitance XIN, all tuning caps OFF

–

10

–

pF

CXOUT

Capacitance XOUT, all tuning caps OFF

–

10

–

pF

CL

All tuning Caps OFF

4

5

6

pF

 

All tuning Caps ON

9.2

10

11.4

pF

 

 

 

 

 

 

COUT

Output Load Capacitance

–

–

15

pF

tRAMP

Power-up time for VDD to reach minimum specified

0.05

–

500

ms

 

voltage (power ramps must be monotonic)

 

 

 

 

TS

Start up time, 90% VDD to valid frequency on output

–

–

10

ms

DC Electrical Specifications TJ = –40 to 125°C over the operating range

Parameter

Description

Condition

Min.

Typ.

Max.

Unit

VIL

Input Low Voltage

CMOS Levels

–

–

20

%VDD

VIH

Input High Voltage

CMOS Levels

80

–

–

%VDD

VOL

Output Low Voltage

VDD = 2.7V–3.6V, IOL = 8 mA

–

–

0.4

V

VOH

Output High Voltage

VDD = 2.7V–3.6V, IOL = –8 mA

VDD–0.4

–

–

V

IIL

Input Low Current

Input = VSS

–

1

10

∝A

IIH

Input High Current

Input = VDD

–

1

10

∝A

IOZL

Output Leakage Current

Output = VSS

–

1

10

∝A

IOZH

Output Leakage Current

Output = VDD

–

–

50

∝A

IDD

Power Supply Current

No Load, VDD = 3.3V, 48 MHz

–

–

20

mA

IPD

Power Down Current

PD# = 0V

–

–

25

∝A

RUP

Input Pull-up resistor

VIN = VSS

1

3

6

MΩ

 

 

VIN> = 0.8VDD

80

120

150

kΩ

RDN

Output Pull-down resistor

VIN = 0.5VDD

500

900

1500

kΩ

CIN

Input Pin Capacitance

PD#/OE pin

–

–

7

pF

RF

Crystal Feedback R

XIN = 0

300

–

800

kΩ

Note:

1. Not 100% tested.

Document #: 38-07738 Rev. *A

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Cypress CY2048WAF manual Absolute Maximum Conditions, Crystal Specifications1, Operating Conditions
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CY2048WAF specifications

The Cypress CY2048WAF is a highly integrated, low-power, real-time clock (RTC) chip designed for a variety of applications that require accurate timekeeping and minimal power consumption. One of the standout features of the CY2048WAF is its ability to maintain precise time in battery-operated devices while operating at extremely low energy levels. This makes it an ideal choice for portable electronics, wearables, and IoT devices where battery life is a critical consideration.

At the heart of the CY2048WAF is its exceptional timekeeping accuracy, which is achieved through the use of a temperature-compensated crystal oscillator (TCXO). This oscillator ensures stability over a wide range of operating temperatures, resulting in long-term time accuracy and reliability. With an integrated power management system, the CY2048WAF can switch between different power modes, allowing it to conserve energy during periods of inactivity.

One of the key technologies integrated into the CY2048WAF is the I2C communication protocol, which simplifies the connection to microcontrollers and other digital systems. The ability to interface seamlessly with various devices makes the CY2048WAF a versatile choice for designers looking to incorporate precise timing functionality across different platforms.

The CY2048WAF also features a built-in alarm function, providing users with the ability to set alarms for various time intervals. This is particularly beneficial in applications where reminders or scheduled events are essential. Additionally, the device includes temperature sensors, enabling it to monitor ambient conditions and adapt its timekeeping functions accordingly.

Another noteworthy characteristic of the CY2048WAF is its compact package size, which allows for easier integration into space-constrained designs. With its low-profile form factor, the chip can be utilized in a variety of devices without significantly increasing the overall size or weight.

In conclusion, the Cypress CY2048WAF is an advanced RTC solution that combines accuracy, low power consumption, and a range of features that enhance its functionality in various applications. Its integration of cutting-edge technologies and thoughtful design make it an excellent choice for developers seeking reliable timekeeping solutions in portable and battery-operated devices.
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