m48t212a STMicroelectronics, m48t212a Datasheet - Page 4

• Manufacturer Part Number: m48t212a
• Description: 3.3v Timekeeper Controller
• Manufacturer: STMicroelectronics

M48T212A
Figure 3. Hardware Hookup
Note: 1. See description in Power Supply Decoupling and Undershoot Protection.
Figure 4. AC Testing Load Circuit
Note: 1. DQ0-DQ7
4/20
C L includes JIG capacitance
SuperCap Supply
DEVICE
UNDER
0.1 F
2. Traces connecting E1
2. E1
3. Excluding open-drain output pins
TEST
CON
3.3V
and E2
CON
1N5817
C L = 100pF or 5pF
C L = 30 pF
CON
645
and E2
(1)
(2)
A0-A18
CON
(1)
to external SRAM should be as short as possible.
(3,4)
V CC
A
E
EX
W
G
WDI
RSTIN1
RSTIN2
DQ0-DQ7
V CAP
V SS
AI03239
M48T212A
A0-A3
1.75V
V CCSW
E1 CON
E2 CON
IRQ/FT
V OUT
RST
X0
XI
Table 5. AC Measurement Conditions
Note that Output Hi-Z is defined as the point where data
is no longer driven.
Input Rise and Fall Times
Input Pulse Voltages
Input and Output Timing Ref. Voltages
Note 2
0.1 F
32 kHz
Crystal
MOTOROLA
MTD20P06HDL
V CC
E
V CC
E
A0-Axx
A0-Axx
CMOS
SRAM
CMOS
SRAM
AI03049
0 to 3V
1.5V
5ns