AB1811-T3 ABRACON, AB1811-T3 Datasheet - Page 6

• Manufacturer Part Number: AB1811-T3
• Description: Real Time Clock Interface SPI HH
• Manufacturer: ABRACON

Specifications of AB1811-T3

• Rohs: yes
• Function: Clock, Calendar, Alarm
• Rtc Bus Interface: SPI
• Time Format: HH
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 1.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-16

4.
The AB18XX package pins are described below. The thermal pad on the QFN-16 packages must be connected to VSS. All
NC pins must be left unconnected.
CLKOUT/nIRQ3
Date of Issue: Sept. 10
FOUT/nIRQ
PSW/nIRQ2
Pin Name
nEXTR
nTIRQ
VBAT
EXTI
nRST
Package Pin Description
VCC
SDO
SDA
WDI
VSS
SCL
nCE
SDI
XO
XI
Page (5) of (13)
PSW/nIRQ2
(1) nEXTR
(1) nRST
(1) WDI
Pin Type
Output
Output
Output
Output
Output
Output
Power
Power
Power
Input
Input
Input
Input
Input
Input
Input
XT
XT
(1) – Available in AB1804 and AB1805 only, else NC
(2) – Available in AB1803 and AB1805 only, else VSS
(3) – Available in AB1814 and AB1815 only, else NC
(4) – Available in AB1813 and AB1815 only, else VSS
th
(1) – Available in AM1804 and AM1805 only, else NC
(2) – Available in AM1803 and AM1805 only, else VSS
(3) – Available in AM1814 and AM1815 only, else NC
(4) – Available in AM1813 and AM1815 only, else VSS
, 2012
1
AB180X
AM180X
VSS
PAD
Function
Ground
System power supply
Crystal input
Crystal output
Battery power supply
I
SPI data output
SPI data input
SPI chip select
I
External interrupt input
Watchdog reset input
External reset input
Interrupt 1/function output
Interrupt 2/power switch output
Interrupt 3/clock output
Timer interrupt output
Reset output
2
2
C or SPI interface clock
C data input/output
nTIRQ (1)
FOUT/nIRQ
EXTI (1)
VSS
Real Time Clock Module
Abracon Drawing #
AB18XX Series
3.0 x 3.0 mm
PSW/nIRQ2
(3) nEXTR
(3) nRST
(3) WDI
1
AB181X
AM181X
01
14
13
16
15
11
5,
9,
7
6
4
VSS
PAD
03
14
13
16
15
11
9,
5
7
6
4
Pin Number in AB18XX
04
14
13
16
15
10
11
12
5,
9,
7
6
2
3
4
8
1
nCE
FOUT/nIRQ
EXTI (3)
SDI
Revision #: Initial Release
05
14
13
16
15
10
11
12
9,
5
7
6
2
3
4
8
1
11
14
13
16
15
12
11
5,
7
6
9
4
ESD Sensitive
13
14
13
16
15
12
11
5
7
6
9
4
14
14
13
16
15
12
10
11
5,
7
6
9
2
3
4
8
1
15
14
13
16
15
12
10
11
5
7
6
9
2
3
4
8
1