DS2404S-C01 Datasheet, PDF (1/2 Pages) Dallas Semiconductor – Dual Port Memory Plus Time

DS2404S-C01
Dual Port Memory Plus Time
www.dalsemi.com
FEATURES
§ Bridge for electronic equipment to the 1-
PIN ASSIGNMENT
Wire MicroLAN
§ 4096 bits of nonvolatile dual-port memory
including real time clock/calendar in binary
format, programmable interval timer, and
programmable power-on cycle counter
§ 1-Wire interface for MicroLAN
VCC
1
IRQ
2
RST
3
DQ
4
16 VCC
15
X1
14
X2
13 GND
communication at 16.3k bits per second
§ 3-Wire host interface for high-speed data
communications at 2M bits per second
§ Unique, factory-lasered and tested 64-bit
I/O
5
CLK
6
NC
7
12
NC
11 1HZ
10 VBATO
registration number (8-bit family code + 48-
GND 8
9 VBATB
bit serial number + 8–bit CRC tester) assures
absolute traceability because no two parts are
alike
§ Memory partitioned into 16 pages of 256-bits
for packetizing data
§ 256-bit scratchpad with strict read/write
protocols ensures integrity of data transfer
§ Programmable alarms can be set to generate
16-PIN SOIC (300 MIL)
See Mech. Drawings
Section
PIN DESCRIPTION
Pin #
Pin Name Description
Pin 1&16 - V_CC
Pin 2
- IRQ
2.8 to 5.5 Volts
Interrupt Output
interrupts for interval timer, real time clock,
Pin 3
- RST
3-Wire Reset Input
and/or cycle counter
§ Space saving 16-pin SOIC package
§ Operating temperature range from -40°C to
+85°C
§ Operating voltage range from 2.8 to 5.5
Pin 4
Pin 5
Pin 6
Pin 7 & 12
Pin 8 & 13
- DQ
- I/O
- CLK
- NC
- GND
3-Wire Input/Output
1-Wire Input/Output
3-Wire Clock Input
No Connection
Ground
Volts
Pin 9
Pin 10
Pin 11
- V_BATB
- V_BATO
- 1 Hz
Battery Backup Input
Battery Operate Input
1 Hz Output
DESCRIPTION
Pin 14 & 15 - X₁, X₂ Crystal Connections
In order to provide universal access to the MicroLAN, the DS2404S-C01 Dual Port Memory Plus Time
has been developed. This device has both 1-Wire and a 3-Wire serial microcontroller interface. The
DS2404S-C01 can be used to make complex functions involving microcontrollers behave as if they were
iButtons.
Being a custom-ROM version of the DS2404, the DS2404S-C01 has the family code 84H. In addition to
this, the 12 most significant bit of the serialization field are coded 001H, leaving 28 bits for serialization.
The communication with the DS2404S-C01 through the 1-Wire port is identical to the DS1994; all
funtions of the DS1994 are available.
1 of 2
102099