CAT1163 Просмотр технического описания (PDF) - ON Semiconductor

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CAT1163

Supervisory Circuits with I2C Serial CMOS EEPROM, Precision Reset Controller and Watchdog Timer (16K)

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CAT1163

Table 6. AC CHARACTERISTICS

VCC = 2.7 V to 6.0 V unless otherwise specified. Output Load is TTL Gate and 100 pF.

VCC = 2.7 V − 6 V

Symbol

Parameter

Min

Max

FSCL

Clock Frequency

100

T1 (Note 1) Noise Suppression Time Constant at SCL, SDA Inputs

200

tAA

SCL Low to SDA Data Out and ACK Out

3.5

tBUF (Note 1) Time the Bus must be Free Before a New Transmission Can Start

4.7

tHD; STA

Start Condition Hold Time

4

tLOW

Clock Low Period

4.7

tHIGH

Clock High Period

4

tSU; STA

Start Condition Setup Time (for a Repeated Start Condition)

4.7

tHD; DAT

Data in Hold Time

0

tSU; DAT

Data in Setup Time

50

tR (Note 1) SDA and SCL Rise Time

1

tF (Note 1) SDA and SCL Fall Time

300

tSU; STO

Stop Condition Setup Time

4

tDH

Data Out Hold Time

100

1. This parameter is tested initially and after a design or process change that affects the parameter.

VCC = 4.5 V − 5.5 V

Min

Max

400

200

1

1.2

0.6

1.2

0.6

0.6

0

50

0.3

300

0.6

100

Units

kHz

ns

ms

ms

ms

ms

ms

ms

ns

ns

ms

ns

ms

ns

Table 7. POWER−UP TIMING (Notes 1 and 2)

Symbol

Parameter

Min

Typ

tPUR

Power−up to Read Operation

tPUW

Power−up to Write Operation

2. tPUR and tPUW are the delays required from the time VCC is stable until the specific operation can be initiated.

Max Units

1

ms

1

ms

Table 8. WRITE CYCLE LIMITS

Symbol

Parameter

Min

Typ

Max Units

tWR

Write Cycle Time

10

ms

The write cycle time is the time from a valid stop condition of a write sequence to the end of the internal program/erase cycle. During the write

cycle, the bus interface circuits are disabled, SDA is allowed to remain high, and the device does not respond to its slave address.

Table 9. RESET CIRCUIT CHARACTERISTICS

Symbol

Parameter

tGLITCH

VRT

VOLRS

VOHRS

VTH

tPURST

tWP

tRPD

VRVALID

Glitch Reject Pulse Width

Reset Threshold Hysteresis

Reset Output Low Voltage (IOLRS = 1 mA)

Reset Output High Voltage

Reset Threshold (VCC = 5 V), (CAT1163−45)

Reset Threshold (VCC = 5 V), (CAT1163−42)

Reset Threshold (VCC = 3.3 V), (CAT1163−30)

Reset Threshold (VCC = 3.3 V), (CAT1163−28)

Reset Threshold (VCC = 3 V), (CAT1163−25)

Power−Up Reset Timeout

Watchdog Period

VTH to RESET Output Delay

RESET Output Valid

Min

Typ

15

VCC − 0.75

4.50

4.25

3.00

2.85

2.55

130

1.6

1

Max Units

100

ns

mV

0.4

V

V

4.75

V

4.50

3.15

3.00

2.70

270

ms

s

5

ms

V

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