FM31L278-G Ramtron, FM31L278-G Datasheet - Page 10

• Manufacturer Part Number: FM31L278-G
• Description: FRAM, MPU SUPPORT, 256K, RTC, SOIC14
• Manufacturer: Ramtron

Specifications of FM31L278-G

• Memory Size: 256Kbit
• Nvram Features: RTC
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: SOIC
• No. Of Pins: 14
• Operating Temperature Range: -40°C To +85°C
• Package / Case: SOIC
• Mounting Style: SMD/SMT
• Memory Configuration: 32768 X 8
• Interface Type: I2C, Serial, 2-Wire
• Rohs Compliant: Yes
• Number Of Voltages Monitored: 1
• Monitored Voltage: 2.6 V or 2.9 V
• Output Type: Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: Watchdog
• Battery Backup Switching: Yes
• Power-up Reset Delay (typ): 200 ms
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Supply Current (typ): 1500 uA
• Power Fail Detection: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Calibration Adjustments
Rev. 2.0
Jan. 2011
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
512.0000
511.9989
511.9967
511.9944
511.9922
511.9900
511.9878
511.9856
511.9833
511.9811
511.9789
511.9767
511.9744
511.9722
511.9700
511.9678
511.9656
511.9633
511.9611
511.9589
511.9567
511.9544
511.9522
511.9500
511.9478
511.9456
511.9433
511.9411
511.9389
511.9367
511.9344
511.9322
512.0000
512.0011
512.0033
512.0056
512.0078
512.0100
512.0122
512.0144
512.0167
512.0189
512.0211
512.0233
512.0256
512.0278
512.0300
512.0322
512.0344
512.0367
512.0389
512.0411
512.0433
512.0456
512.0478
512.0500
512.0522
512.0544
512.0567
512.0589
512.0611
512.0633
512.0656
512.0678
Measured Frequency Range
Measured Frequency Range
Min
Min
Positive Calibration for slow clocks: Calibration will achieve ± 2.17 PPM after calibration
Negative Calibration for fast clocks: Calibration will achieve ± 2.17 PPM after calibration
511.9989
511.9967
511.9944
511.9922
511.9900
511.9878
511.9856
511.9833
511.9811
511.9789
511.9767
511.9744
511.9722
511.9700
511.9678
511.9656
511.9633
511.9611
511.9589
511.9567
511.9544
511.9522
511.9500
511.9478
511.9456
511.9433
511.9411
511.9389
511.9367
511.9344
511.9322
511.9300
512.0011
512.0033
512.0056
512.0078
512.0100
512.0122
512.0144
512.0167
512.0189
512.0211
512.0233
512.0256
512.0278
512.0300
512.0322
512.0344
512.0367
512.0389
512.0411
512.0433
512.0456
512.0478
512.0500
512.0522
512.0544
512.0567
512.0589
512.0611
512.0633
512.0656
512.0678
512.0700
Max
Max
Error Range (PPM)
102.00
106.34
110.68
115.02
119.36
123.70
128.04
132.38
102.00
106.34
110.68
115.02
119.36
123.70
128.04
132.38
10.86
15.20
19.54
23.88
28.22
32.56
36.90
41.24
45.58
49.92
54.26
58.60
62.94
67.28
71.62
75.96
80.30
84.64
88.98
93.32
97.66
10.86
15.20
19.54
23.88
28.22
32.56
36.90
41.24
45.58
49.92
54.26
58.60
62.94
67.28
71.62
75.96
80.30
84.64
88.98
93.32
97.66
2.18
6.52
2.18
6.52
Min
Min
Error Range (PPM)
0
0
101.99
106.33
110.67
115.01
119.35
123.69
128.03
132.37
136.71
101.99
106.33
110.67
115.01
119.35
123.69
128.03
132.37
136.71
10.85
15.19
19.53
23.87
28.21
32.55
36.89
41.23
45.57
49.91
54.25
58.59
62.93
67.27
71.61
75.95
80.29
84.63
88.97
93.31
97.65
10.85
15.19
19.53
23.87
28.21
32.55
36.89
41.23
45.57
49.91
54.25
58.59
62.93
67.27
71.61
75.95
80.29
84.63
88.97
93.31
97.65
2.17
6.51
2.17
6.51
Max
Max
FM31L278/L276/L274/L272 - 3V I2C Companion
Program Calibration Register to:
Program Calibration Register to:
000000
100001
100010
100011
100100
100101
100110
100111
101000
101001
101010
101011
101100
101101
101110
101111
110000
110001
110010
110011
110100
110101
110110
110111
111000
111001
111010
111011
111100
111101
111110
111111
000000
000001
000010
000011
000100
000101
000110
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
010001
010010
010011
010100
010101
010110
010111
011000
011001
011010
011011
011100
011101
011110
011111
Page 10 of 26