Datasheet

MCP7941X
DS22266A-page 4 Preliminary  2010 Microchip Technology Inc.
TABLE 1-2: AC CHARACTERISTICS
AC CHARACTERISTICS
Electrical Characteristics:
Industrial (I): V
CC = +1.8V to 5.5V TA = -40°C to +85°C
Param.
No.
Symbol Characteristic Min. Max. Units Conditions
1F
CLK Clock frequency —
—
100
400
kHz 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
2THIGH Clock high time 4000
600
—
—
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
3T
LOW Clock low time 4700
1300
—
—
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
4TR SDA and SCL rise time
(Note 1)
—
—
1000
300
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
5TF SDA and SCL fall time
(Note 1)
—
—
1000
300
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
6T
HD:STA Start condition hold time 4000
600
—
—
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
7TSU:STA Start condition setup time 4700
600
—
—
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
8THD:DAT Data input hold time 0 — ns
9TSU:DAT Data input setup time 250
100
—
—
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
10 TSU:STO Stop condition setup time 4000
600
—
—
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
11 T
AA Output valid from clock —
—
3500
900
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
12 TBUF Bus free time: Time the bus
must be free before a new
transmission can start
4700
1300
—
—
ns 1.8V  VCC < 2.5V
2.5V  V
CC  5.5V
13 T
SP Input filter spike suppression
(SDA and SCL pins)
—50ns(Note 1 and Note 2)
14 T
WC Write cycle time (byte or
page)
—5ms—
15 — Endurance 1M — cycles 25°C, V
CC = 5.5V Page mode
(Note 3)
Note 1: Not 100% tested.
2: The combined T
SP and VHYS specifications are due to new Schmitt Trigger inputs, which provide improved
noise spike suppression. This eliminates the need for a T
I specification for standard operation.
3: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site
at www.microchip.com.