MAXIM DS4510 User Manual

General Description

The DS4510 is a CPU supervisor with integrated 64­byte EEPROM memory and four programmable, non­volatile (NV) I/O pins. It is configured with an
industry-standard I

2

C interface using either fast-mode
(400kbps) or standard-mode (100kbps) communica­tion. The I/O pins can be used as general-purpose I2C­to-parallel I/O expander with unlimited read/write
capability. EEPROM registers allow the power-on value
of the I/O pins to be adjusted to keep track of the sys­tem’s state through power cycles, and the CPU supervi­sor’s timer can be adjusted between 125ms and
1000ms to meet most any application need.

Applications

RAM-Based FPGA Bank Switching for
Multiple Profiles

Industrial Controls

Cellular Telephones

PC Peripherals

PDAs

Features

♦ Accurate 5%, 10%, or 15% 5V Power-Supply

Monitoring

♦ Programmable Reset Timer Maintains Reset After

V

CC

Returns to an In-Tolerance Condition

♦ Four Programmable, NV, Digital I/O Pins with

Selectable Internal Pullup Resistor

♦ 64 Bytes of User EEPROM

♦ Reduces Need for Discrete Components

♦ I

2

C-Compatible Serial Interface

♦ 10-Pin µSOP Package

DS4510

CPU Supervisor with Nonvolatile Memory and

Programmable I/O

______________________________________________ Maxim Integrated Products 1

1

2

3

4

5

10

9

8

7

6

I/O

0

I/O

1

I/O

2

V

CC

SCL

SDA

A

0

TOP VIEW

I/O

3

GND

μ

SOP

DS4510

RST

Pin Configuration

Ordering Information

DS4510

A0

SDA

SCL

I/O

0

I/O

1

I/O

2

I/O

3

GND

V

CC

V

CC

FPGA

2.7V TO 5.5V

GND

RESET

CONFIG0

CONFIG1

CONFIG2

CONFIG3

FROM

SYSTEM

CONTROLLER

4.7kΩ 4.7kΩ

4.7kΩ

RST

Typical Operating Circuit

Rev 2; 8/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

V

CC

TRIP

PIN-

PACKAGE

DS4510U-5 5%

10 µSOP

DS4510U-10 10%

10 µSOP

DS4510U-15 15%

10 µSOP

DS4510U-5/T&R 5%

10 µSOP

DS4510U-10/T&R 10%

10 µSOP

DS4510U-15/T&R 15%

10 µSOP

POINT

TEMP RANGE

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

DS4510

CPU Supervisor with Nonvolatile Memory and
Programmable I/O

2 _____________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS

(TA= -40°C to +85°C)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Voltage Range on VCC, SDA, and SCL

Pins Relative to Ground.....................................-0.5V to +6.0V

Voltage Range on A

0

, I/O0, I/O1, I/O2, I/O3Relative

to Ground ..............-0.5V to V

CC

+ 0.5V, not to exceed +6.0V.

Operating Temperature Range ...........................-40°C to +85°C

EEPROM Programming Temperature.....................0°C to +70°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature .......................................See IPC/JEDEC

J-STD-020A Specification

PARAMETER

CONDITIONS

UNITS

Supply Voltage V

CC

(Notes 1) 2.7 5.5 V

Input Logic 1 V

IH

(Note 2)

V

Input Logic 0 V

IL

V

DC ELECTRICAL CHARACTERISTICS

(VCC= 2.7V to 5.5V, TA= -40°C to +85°C.)

PARAMETER

CONDITIONS

UNITS

DS4510U-5 4.5

DS4510U-10

VCC Trip Point V

CCTP

DS4510U-15 4.0

V

Standby Current I

STBY

VCC = 5.0V (Note 3) 50 75 µA

Input Leakage I

L

µA

3mA sink current 0.4

SDA Low-Level Output Voltage V

OL

6mA sink current 0.6

V

I/OX Low-Level Output Voltage V

OLIOX

4mA sink current 0.4 V

RST Pin Low-Level Output

10mA sink current (Note 4) 0.4 V

I/OX Pullup Resistors R

P

4.0 5.0 6.5 kΩ

I/O Capacitance C

I/O

(Note 5) 10 pF

SYMBOL

MIN TYP MAX

SYMBOL

V

OLRST

0.7 x V

CC

-0.3 +0.3 x V

MIN TYP MAX

4.25 4.375 4.49

-1.0 +1.0

V

CC

4.625 4.75

4.125 4.24

+ 0.3

CC

DS4510

CPU Supervisor with Nonvolatile Memory and

Programmable I/O

_____________________________________________________________________ 3

CPU SUPERVISOR AC ELECTRICAL CHARACTERISTICS (See Figure 1)

(VCC= 2.7V to 5.5V, TA= -40°C to +85°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

TD1= 0, TD0 = 0

138

TD1= 0, TD0 = 1

275

TD1= 1, TD0 = 0

550

RST Active Time t

RST

TD1= 1, TD0 = 1

ms

TD1= 0, TD0 = 0

138

TD1= 0, TD0 = 1

275

TD1= 1, TD0 = 0

550

VCC Detect to RST t

RPU

TD1= 1, TD0 = 1

ms

VCC Fail to RST t

RPD

410µs

AC ELECTRICAL CHARACTERISTICS (See Figure 5)

(VCC= 2.7V to 5.5V, TA= -40°C to +85°C, timing referenced to V

IL(MAX)

and

V

IH(MIN)

.)

PARAMETER

CONDITIONS

UNITS

SCL Clock Frequency f

SCL

(Note 6) 0

kHz

Bus Free Time Between Stop and
Start Conditions

t

BUF

1.3 µs

Hold Time (Repeated) Start
Condition

0.6 µs

Low Period of SCL t

LOW

1.3 µs

High Period of SCL t

HIGH

0.6 µs

Data Hold Time

0 0.9 µs

Data Setup Time

ns

Start Setup time t

SU:STA

0.6 µs

SDA and SCL Rise Time t

R

(Note 7)

ns

SDA and SCL Fall Time t

F

(Note 7)

ns

Stop Setup Time

0.6 µs

SDA and SCL Capacitive
Loading

C

B

(Note 7)

pF

EEPROM Write Time t

W

(Note 7) 10 20 ms

112 125

225 250

450 500

900 1000 1100

112 125

225 250

450 500

900 1000 1100

SYMBOL

MIN TYP MAX

400

t

HD:STA

t

HD:DAT

t

SU:DAT

t

SU:STO

100

20 + 0.1C

20 + 0.1C

B

B

300

300

400

DS4510

CPU Supervisor with Nonvolatile Memory and
Programmable I/O

4 _____________________________________________________________________

Note 1: All voltages referenced to ground.
Note 2: The DS4510 does not obstruct the SDA and SCL lines if V

CC

is switched off, as long as the voltages applied to these

inputs do not violate their min and max input voltage levels.

Note 3: I

STBY

specified with V

CC

equal to 5.0V, and control port-logic pins are driven to ground or VCCfor the corresponding

inactive state (SDA = SCL = V

CC

), does not include pullup resistor current.

Note 4: See Typical Operating Characteristics for the RST output voltage vs. supply voltage.
Note 5: This parameter is guaranteed by design.

Note 6: I

2

C interface timing shown for is for fast-mode (400kHz) operation. This device is also backward compatible with I2C

standard-mode timing.

Note 7: CB—total capacitance of one bus line in picofarads.
Note 8: EEPROM write time applies to all the EEPROM memory and SEEPROM memory when SEE = 0. The EEPROM write time

begins at the occurrence of a stop condition.

NONVOLATILE MEMORY CHARACTERISTICS

(VCC= 2.7V to 5.5V, TA= 0°C to +70°C.)

PARAMETER

CONDITIONS

UNITS

Writes +70°C (Note 5)

Typical Operating Characteristics

(VCC= +5.0V, TA = +25°C, unless otherwise noted.)

SUPPLY CURRENT vs. SUPPLY VOLTAGE

DS4510 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

4.54.03.5

35

40

45

50

30

3.0 5.0

VCC (10%)
TRIP POINT

SDA = SCL = V

CC

I/O CONTROL BITS = 0
I/O PULLUPS DISABLED

SUPPLY CURRENT vs. TEMPERATURE

DS4510 toc02

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

6040200-20

10

20

30

40

50

60

0

-40 80

SDA = SCL = V

CC

SUPPLY CURRENT vs. SCL FREQUENCY

DS4510 toc03

SCL FREQUENCY (kHz)

SUPPLY CURRENT (µA)

300200100

10

20

30

40

50

60

70

0

0 400

SDA = V

CC

SYMBOL

MIN TYP MAX

50,000