DS1558W+ Maxim Integrated Products, DS1558W+ Datasheet - Page 18

• Manufacturer Part Number: DS1558W+
• Description: IC RTC W/NV RAM 3.3V 48-LQFP
• Manufacturer: Maxim Integrated Products
• Type: Watchdog Timer/NVSRAMr

Specifications of DS1558W+

• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

AC TEST CONDITIONS
Output L
Input Pulse Levels: 0 to +3V
Timing Measure
Input Pulse Rise and Fall Tim
NOTES:
1) Voltage referenced to ground.
2) Typical values are at +25C and nominal supplies.
3) Outputs are open.
4) Battery switchover occurs at the lower of either the battery voltage or V
5) The
6) Using the recommended crystal on X1 and X2.
7) V
8) t
9) t
10) Typical measured with V
PACKAGE INFORMATION
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product.
No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.
M a x i m I n t e g r a t e d P r o d u c t s , 1 2 0 S a n G a b r i e l D r i v e , S u n n y v a l e , C A 9 4 0 8 6 4 0 8 - 7 3 7 - 7 6 0 0
PACKAGE TYPE
The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation.
AH1
AH2
CCO
48 TQFP
Input: +1.5V
Output: +1.5V
, t
, t
IRQ
,
oad: 25pF
DH1
DH2
CER
/FT and
are measured from WE going high.
are measured from CE going high.
, and
ment Reference Le
OER
RST
PACKAGE CODE
pins open.
outputs are open drain.
C48+1
BAT
es: 5ns
at 3.0V. Typical with I
vels
:
© 2005 Maxim Integrated Products
DOCUMENT NO.
21-0054
18 of 18
CCO
= 100μA and V
BAT
PF
.
= 3.0V is V
BAT
- 0.322.