MCP7952X Datasheet, PDF (4/50 Pages) Micro Analog systems – 3V SPI Real-Time Clock Calendar with Battery Switchover

MCP7952X/MCP7951X
TABLE 1-2: AC CHARACTERISTICS
AC CHARACTERISTICS
Industrial (I):
TAMB = -40°C to +85°C VCC = 1.8V to 3.6V
Param.
No.
Sym.
Characteristic
Min.
Max. Units
Test Conditions
1
FCLK Clock Frequency
—
5
MHz 2.5V Vcc  3.6V
—
3
MHz 1.8V Vcc  2.5V
2
TCSS CS Setup Time
100
—
ns 2.5V Vcc  3.6V
150
—
ns 1.8V Vcc  2.5V
3
TCSH CS Hold Time
100
—
ns 2.5V Vcc  3.6V
150
—
ns 1.8V Vcc  2.5V
4
TCSD CS Disable Time
50
—
ns —
5
Tsu Data Setup Time
20
—
ns 2.5V Vcc  3.6V
30
—
ns 1.8V Vcc  2.5V
6
THD Data Hold Time
40
—
ns 2.5V Vcc  3.6V
50
—
ns 1.8V Vcc  2.5V
7
TR CLK Rise Time
—
100
ns (Note 1)
8
TF CLK Fall Time
—
100
ns (Note 1)
9
THI Clock High Time
100
—
ns 2.5V Vcc  3.6V
150
—
ns 1.8V Vcc  2.5V
10
TLO Clock Low Time
100
—
ns 2.5V Vcc  3.6V
150
—
ns 1.8V Vcc  2.5V
11
TCLD Clock Delay Time
50
—
ns —
12
TCLE Clock Enable Time
50
—
ns —
13
TV Output Valid from Clock
—
Low
—
100
ns 2.5V Vcc  3.6V
160
ns 1.8V Vcc  2.5V
14
THO Output Hold Time
0
—
ns (Note 1)
15
TDIS Output Disable Time
—
80
ns 2.5V Vcc  3.6V (Note 1)
—
160
ns 1.8V Vcc  2.5V (Note 1)
16
TWC Internal Write Cycle Time
—
5
ms (Note 3)
17
— Endurance
1,000,000
—
E/W (Note 2)
Cycles
Note 1: This parameter is periodically sampled and not 100% tested.
2: 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:
www.microchip.com.
3: TWC begins on the rising edge of CS after a valid write sequence and ends when the internal write cycle
is complete.
DS22300A-page 4
Preliminary
 2012 Microchip Technology Inc.