DS138632-120 [DALLAS]
RAMified Watchdog Timekeeper; 分枝看门狗计时器
| 型号： | DS138632-120 |
| 厂家： | 
DALLAS SEMICONDUCTOR |
| 描述： | RAMified Watchdog Timekeeper |
| 文件： | 总20页 (文件大小：263K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DS1386/DS1386P
www.maxim-ic.com
FEATURES
PIN ASSIGNMENT
C 8 or 32 kbytes of user NV RAM
C Integrated NV SRAM, real time clock,
crystal, power-fail control circuit and lithium
energy source
INTB
NC
A12
A7
1
32
31
V
SQW
VCC
WE
NC
INTA
INTB
A14
A12
A7
1
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VCC
SQW
VCC
WE
A13
A8
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
30
29
28
27
26
25
24
23
22
21
20
19
18
17
C Totally nonvolatile with over 10 years of
operation in the absence of power
C Watchdog timer restarts an out-of-control
processor
A6
A8
A6
A5
A9
A5
A9
A4
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
A4
A3
A3
A2
A2
A1
C Alarm function schedules real-time related
activities such as system wakeup
C Programmable interrupts and square wave
output
A1
A0
DQ0
DQ1
DQ2
GND
A0
DQ0
DQ1
DQ2
GND
C All registers are individually addressable via
the address and data bus
DS1386 8k x 8
32-Pin Encapsulated Package
DS1386 32k x 8
32-Pin Encapsulated Package
C Interrupt signals are active in power-down
mode
INTA
SQW
NC
INTA
SQW
A14
34
33
32
31
30
34
33
32
31
30
1
2
3
1
2
3
NC
NC
NC
NC
NC
A12
A11
A10
A9
A13
A12
A11
A10
A9
4
5
6
7
8
9
4
5
6
7
8
9
PFO
VCC
PFO
VCC
29
28
27
26
25
24
23
22
21
20
19
18
29
28
27
26
25
24
23
22
21
20
19
18
WE
WE
OE
CE
OE
CE
A8
A8
DQ7
DQ6
DQ5
DQ4
DQ3
DQ7
DQ6
DQ5
DQ4
DQ3
A7
A6
A5
A4
A3
A2
A1
A0
A7
A6
A5
A4
A3
A2
A1
A0
10
11
12
13
14
15
16
17
10
11
12
13
14
15
16
17
DQ2
DQ1
DQ0
GND
DQ2
DQ1
DQ0
GND
X1 GND VBAT
X2
X1 GND VBAT X2
DS1386 8k x 8
DS1386 32k x 8
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
1 of 20
072401
DS1386/DS1386P
ORDERING INFORMATION
DS1386
XX-120
32-pin DIP Module
08
32
8k x 8 NV SRAM
32k x 8 NV SRAM
*DS1386P
XX-120
34-pin PowerCap® Module Board
08
32
8k x 8 NV SRAM
32k x 8 NV SRAM
*DS9034PCX PowerCap required
(must be ordered separately)
PIN DESCRIPTION
INTA
- Interrupt Output A (open drain)
INTB (INTB) - Interrupt Output B (open drain)
A0-A14
- Address Inputs
DQ0-DQ7
- Data Input/Output
CE
OE
WE
- Chip Enable
- Output Enable
- Write Enable
VCC
- +5V
GND
SQW
NC
- Ground
- Square Wave Output
- No Connection
- Crystal Connection
- Battery Connection
X1, X2
VBAT
DESCRIPTION
The DS1386 is a nonvolatile static RAM with a full-function Real Time Clock (RTC), alarm, watchdog
timer, and interval timer which are all accessible in a byte-wide format. The DS1386 contains a lithium
energy source and a quartz crystal, which eliminates the need for any external circuitry. Data contained
within 8k or 32k by 8-bit memory and the timekeeping registers can be read or written in the same
manner as bytewide static RAM. The timekeeping registers are located in the first 14 bytes of memory
space. Data is maintained in the RAMified Timekeeper by intelligent control circuitry, which detects the
status of VCC and write protects memory when VCC is out of tolerance. The lithium energy source can
maintain data and real time for over ten years in the absence of VCC. Timekeeper information includes
hundredths of seconds, seconds, minutes, hours, day, date, month, and year. The date at the end of the
month is automatically adjusted for months with less than 31 days, including correction for leap year.
The RAMified Timekeeper operates in either 24-hour or 12-hour format with an AM/PM indicator. The
watchdog timer provides alarm interrupts and interval timing between 0.01seconds and 99.99 seconds.
The real time alarm provides for preset times of up to one week. Interrupts for both watchdog and RTC
will operate when system is powered down. Either can provide system “wake-up” signals.
2 of 20
DS1386/1386P
PACKAGES
The DS1386 is available in two packages (32-pin DIP module and 34-pin PowerCap module). The 32-pin
DIP style module integrates the crystal, lithium energy source, and silicon all in one package. The 34-pin
PowerCap Module Board is designed with contacts for connection to a separate PowerCap (DS9034PCX)
that contains the crystal and battery. This design allows the PowerCap to be mounted on top of the
DS1386P after the completion of the surface mount process. Mounting the PowerCap after the surface
mount process prevents damage to the crystal and battery due to high temperatures required for solder
reflow. The PowerCap is keyed to prevent reverse insertion. The PowerCap Module Board and PowerCap
are ordered separately and shipped in separate containers. The part number for the PowerCap is
DS9034PCX.
OPERATION - READ REGISTERS
The DS1386 executes a read cycle whenever WE (Write Enable) is inactive (High), CE (Chip Enable)
and OE (Output Enable) are active (Low). The unique address specified by the address inputs (A0-A14)
defines which of the registers is to be accessed. Valid data will be available to the eight data output
drivers within tACC (Access Time) after the last address-input signal is stable, providing that CE and OE
access times are also satisfied. If OE and CE access times are not satisfied, then data access must be
measured from the latter occurring signal (CE or OE ) and the limiting parameter is either tCO for CE or
tOE for OE rather than address access.
OPERATION - WRITE REGISTERS
The DS1386 is in the write mode whenever the WE (Write Enable) and CE (Chip Enable) signals are in
the active (Low) state after the address inputs are stable. The latter occurring falling edge of CE or WE
will determine the start of the write cycle. The write cycle is terminated by the earlier rising edge of CE
or WE. All address inputs must be kept valid throughout the write cycle. WE must return to the high state
for a minimum recovery state (tWR) before another cycle can be initiated. Data must be valid on the data
bus with sufficient Data Set-Up (tDS) and Data Hold Time (tDH) with respect to the earlier rising edge of
CE or WE. The OE control signal should be kept inactive (High) during write cycles to avoid bus
contention. However, if the output bus has been enabled (CE and OE active), then WE will disable the
outputs in tODW from its falling edge.
DATA RETENTION
The RAMified Timekeeper provides full functional capability when VCC is greater than 4.5 volts and
write-protects the register contents at 4.25 volts typical. Data is maintained in the absence of VCC without
any additional support circuitry. The DS1386 constantly monitors VCC. Should the supply voltage decay,
the RAMified Timekeeper will automatically write-protect itself and all inputs to the registers become
“don’t care.” The two interrupts INTA and INTB (INTB) and the internal clock and timers continue to run
regardless of the level of VCC. However, it is important to insure that the pull-up resistors used with the
interrupt pins are never pulled up to a value that is greater than VCC + 0.3V. As VCC falls below
approximately 3.0 volts, a power switching circuit turns the internal lithium energy source on to maintain
the clock and timer data and functionality. It is also required to insure that during this time (battery
backup mode), the voltage present at INTA and INTB (INTB) never exceeds 3.0V. During power-up,
when VCC rises above approximately 3.0 volts, the power switching circuit connects external VCC and
disconnects the internal lithium energy source. Normal operation can resume after VCC exceeds 4.5 volts
for a period of 200 ms.
3 of 20
DS1386/1386P
RAMIFIED TIMEKEEPER REGISTERS
The RAMified Timekeeper has 14 registers, which are 8 bits wide that contain all of the timekeeping,
alarm, and watchdog and control information. The clock, calendar, alarm, and watchdog registers are
memory locations, which contain external (user-accessible) copies of the timekeeping data. The external
copies are independent of internal functions except that they are updated periodically by the simultaneous
transfer of the incremented internal copy (see Figure 1). The Command Register bits are affected by both
internal and external functions. This register will be discussed later. The 8 or 32 kbytes of RAM and the
14 external timekeeping registers are accessed from the external address and data bus. Registers 0, 1, 2,
4, 6, 8, 9, and A contain time of day and date information (see Figure 2). Time of day information is
stored in BCD. Registers 3, 5, and 7 contain the Time of Day Alarm information. Time of Day Alarm
information is stored in BCD. Register B is the Command Register and information in this register is
binary. Registers C and D are the Watchdog Alarm Registers and information, which is stored in these
two registers, is in BCD. Registers E through 1FFF or 7FFF are user bytes and can be used to maintain
data at the user’s discretion.
CLOCK ACCURACY (DIP MODULE)
The DS1386 is guaranteed to keep time accuracy to within ±1 minute per month at 25°C.
CLOCK ACCURACY (POWERCAP MODULE)
The DS1386P and DS9034PCX are each individually tested for accuracy. Once mounted together, the
module is guaranteed to keep time accuracy to within M1.53 minutes per month (35 ppm) at 25LC.
4 of 20
DS1386/1386P
BLOCK DIAGRAM Figure 1
5 of 20
DS1386/1386P
TIME OF DAY REGISTERS
Registers 0, 1, 2, 4, 6, 8, 9, and A contain time of day data in BCD. Ten bits within these eight registers
are not used and will always read 0 regardless of how they are written. Bits 6 and 7 in the Months
Register (9) are binary bits. When set to logic 0, EOSC (Bit 7) enables the Real Time Clock oscillator.
This bit is set to logic 1 as shipped from Dallas Semiconductor to prevent lithium energy consumption
during storage and shipment (DIP Module only). This bit will normally be turned on by the user during
device initialization. However, the oscillator can be turned on and off as necessary by setting this bit to
the appropriate level. Bit 6 of this same byte controls the square wave output. When set to logic 0, the
square wave output pin will output a 1024 Hz square wave signal. When set to logic 1 the square wave
output pin is in a high impedance state. Bit 6 of the Hours Register is defined as the 12- or 24-hour select
bit. When set to logic 1, the 12-hour format is selected. In the 12-hour format, bit 5 is the AM/PM bit
with logic 1 being PM. In the 24-hour mode, bit 5 is the second 10-hour bit (20-23 hours). The Time of
Day Registers are updated every 0.01 seconds from the Real Time Clock, except when the TE bit (bit 7 of
Register B) is set low or the clock oscillator is not running. The preferred method of synchronizing data
access to and from the RAMified Timekeeper is to access the Command Register by doing a write cycle
to address location 0B and setting the TE bit (transfer enable bit) to a logic 0. This will freeze the
External Time of Day Registers at the present recorded time, allowing access to occur without danger of
simultaneous update. When the watch registers have been read or written, a second write cycle to location
0B, setting the TE bit to a logic 1, will put the Time of Day Registers back to being updated every
.01 second. No time is lost in the Real Time Clock because the internal copy of the Time of Day Register
buffers is continually incremented while the external memory registers are frozen. An alternate method of
reading and writing the Time of Day Registers is to ignore synchronization. However, any single read
may give erroneous data as the Real Time Clock may be in the process of updating the external memory
registers as data is being read. The internal copies of seconds through years are incremented, and the
time of day alarm is checked during the period that hundreds of seconds reads 99 and are transferred to
the external register when hundredths of seconds roll from 99 to 00. A way of making sure data is valid is
to do multiple reads and compare. Writing the registers can also produce erroneous results for the same
reasons. A way of making sure that the write cycle has caused proper update is to do read verifies and re-
execute the write cycle if data is not correct. While the possibility of erroneous results from reads and
write cycles has been stated, it is worth noting that the probability of an incorrect result is kept to a
minimum due to the redundant structure of the RAMified Timekeeper.
TIME OF DAY ALARM REGISTERS
Registers 3, 5, and 7 contain the Time of Day Alarm Registers. Bits 3, 4, 5, and 6 of Register 7 will
always read 0 regardless of how they are written. Bit 7 of Registers 3, 5, and 7 are mask bits (Figure 3).
When all of the mask bits are logic 0, a Time of Day Alarm will only occur when Registers 2, 4, and 6
match the values stored in Registers 3, 5, and 7. An alarm will be generated every day when bit 7 of
Register 7 is set to a logic 1. Similarly, an alarm is generated every hour when bit 7 of Registers 7 and 5
is set to a logic 1. When bit 7 of Registers 7, 5, and 3 is set to a logic 1, an alarm will occur every minute
when Register 1 (seconds) rolls from 59 to 00.
Time of Day Alarm Registers are written and read in the same format as the Time of Day Registers. The
Time of Day Alarm Flag and Interrupt are always cleared when Alarm Registers are read or written.
6 of 20
DS1386/1386P
WATCHDOG ALARM REGISTERS
Registers C and D contain the time for the watchdog alarm. The two registers contain a time count from
00.01 to 99.99 seconds in BCD. The value written into the Watchdog Alarm Registers can be written or
read in any order. Any access to Register C or D will cause the watchdog alarm to reinitialize and clears
the watchdog flag bit and the watchdog interrupt output. When a new value is entered or the Watchdog
Registers are read, the watchdog timer will start counting down from the entered value to zero. When
zero is reached, the watchdog interrupt output will go to the active state. The watchdog timer countdown
is interrupted and reinitialized back to the entered value every time either of the registers are accessed. In
this manner, controlled periodic accesses to the watchdog timer can prevent the watchdog alarm from
going to an active level. If access does not occur, countdown alarm will be repetitive. The Watchdog
Alarm Registers always read the entered value. The actual countdown register is internal and is not
readable. Writing registers C and D to 0 will disable the watchdog alarm feature.
7 of 20
DS1386/1386P
DS1386 RAMIFED WATCHDOG TIMEKEEPER REGISTERS Figure 2
8 of 20
DS1386/1386P
TIME OF DAY ALARM MASK BITS Figure 3
REGISTER
(3) MINUTES
(5) HOURS
(7) DAYS
1
0
0
1
1
0
1
1
1
ALARM ONCE PER MINUTE
ALARM WHEN MINUTES MATCH
ALARM WHEN HOURS AND MINUTES
MATCH
ALARM WHEN HOURS, MINUTES AND
DAYS MATCH
0
0
0
NOTE:
Any other bit combinations of mask bit settings produce illogical operation.
COMMAND REGISTER
Address location 0Bh is the Command Register where mask bits, control bits and flag bits reside. The
operation of each bit is as follows:
TE - Bit 7 Transfer Enable-This bit when set to a logic 0 will disable the transfer of data between internal
and external clock registers. The contents in the external clock registers are now frozen and reads or
writes will not be affected with updates. This bit must be set to a logic 1 to allow updates.
IPSW - Bit 6 Interrupt Switch-When set to a logic 1, INTA is the Time of Day Alarm and INTB/( INTB )
is the Watchdog Alarm. When set to logic 0, this bit reverses the output pins. INTA is now the watchdog
alarm output and INTB/( INTB ) is the time of day alarm output.
IBH/LO - Bit 5 Interrupt B Sink or Source Current-When this bit is set to a logic 1 and VCC is applied,
INTB/( INTB ) will source current (see DC characteristics IOH). When this bit is set to a logic 0, INTB
will sink current (see DC characteristics IOL).
PU/LVL - Bit 4 Interrupt Pulse Mode or Level Mode - This bit determines whether both interrupts will
output a pulse or level signal. When set to a logic 0, INTA and INTB/( INTB ) will be in the level mode.
When this bit is set to a logic 1, the pulse mode is selected and INTA will sink current for a minimum of
3 ms and then release. INTB/( INTB ) will either sink or source current, depending on the condition of
Bit 5, for a minimum of 3 ms and then release. INTB will only source current when there is a voltage
present on VCC.
WAM - Bit 3 Watchdog Alarm Mask - When this bit is set to a logic 0, the watchdog interrupt output
will be activated. The activated state is determined by bits 1,4,5, and 6 of the COMMAND REGISTER.
When this bit is set to a logic 1, the watchdog interrupt output is deactivated.
TDM - Bit 2 Time of Day Alarm Mask - When this bit is set to a logic 0, the time of day alarm interrupt
output will be activated. The activated state is determined by bits 0,4,5, and 6 of the COMMAND
REGISTER. When this bit is set to a logic 1, the time of day alarm interrupt output is deactivated.
9 of 20
DS1386/1386P
WAF - Bit 1 Watchdog Alarm Flag - This bit is set to a logic 1 when a watchdog alarm interrupt occurs.
This bit is read only.
The bit is reset when any of the watchdog alarm registers are accessed.
When the interrupt is in the pulse mode (see bit 4 definition), this flag will be in the logic 1 state only
during the time the interrupt is active.
TDF - Bit 0 Time of Day Flag - This is a read only bit. This bit is set to a logic 1 when a time of day
alarm has occurred. The time the alarm occurred can be determined by reading the time of day alarm
registers. This bit is reset to a logic 0 state when any of the time of day alarm registers are accessed.
When the interrupt is in the pulse mode (see bit 4 definition), this flag will be in the logic 1 state only
during the time the interrupt is active.
10 of 20
DS1386/1386P
ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
-0.3V to +7.0V
0°C to 70°C
Storage Temperature
-40°C to +70°C
Soldering Temperature
See J-STD-020A Specification (See Note 14)
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
(0LC to 70LC)
PARAMETER
Supply Voltage
Input Logic 1
Input Logic 0
SYMBOL
VCC
MIN
4.5
TYP
MAX
5.5
UNITS NOTES
5.0
V
V
V
10
10
10
VIH
2.2
VCC+0.3
+0.8
VIL
-0.3
DC ELECTRICAL CHARACTERISTICS
(0LC to 70LC; VCC = 5.0V ± 10%)
PARAMETER
SYMBOL
IIL
MIN
-1.0
-1.0
-1.0
-1.0
TYP
MAX
+1.0
+1.0
+1.0
UNITS NOTES
Input Leakage Current
Output Leakage Current
I/O Leakage Current
Output Current @ 2.4V
Output Current @ 0.4V
µA
µA
µA
mA
ILO
ILIO
IOH
IOL
2.1
7.0
mA
mA
13
ICCS1
3.0
2.0
Standby Current CE =2.2V
ICCS2
4.0
mA
Standby Current CE =VCC-0.5
Active Current
ICC
85
mA
V
Write Protection Voltage
VTP
4.0
4.25
4.5
CAPACITANCE
(tA=25LC)
PARAMETER
SYMBOL
CIN
MIN
TYP
MAX
15
UNITS NOTES
Input Capacitance
7
7
7
pF
pF
pF
Output Capacitance
Input/Output Capacitance
COUT
15
CI/O
15
11 of 20
DS1386/1386P
AC ELECTRICAL CHARACTERISTICS
(0LC to 70LC; VCC = 5.0V ± 10%)
DS1386XX-120
PARAMETER
Read Cycle Time
Address Access Time
SYMBOL
tRC
MIN
120
MAX
UNITS
NOTES
ns
ns
ns
1
tACC
tCO
120
120
CE Access Time
OE Access Time
tOE
100
ns
ns
tCOE
10
OE or CE to Output Active
Output High Z from Deselect
Output Hold from Address Change
Write Cycle Time
Write Pulse Width
Address Setup Time
tOD
tOH
tWC
tWP
tAW
tWR
tODW
40
ns
ns
ns
ns
ns
ns
ns
10
120
110
0
3
Write Recovery Time
10
40
Output High Z from WE
tOEW
10
ns
Output Active from WE
Data Setup Time
Data Hold Time
tDS
tDH
tIPW
85
10
3
ns
ns
ms
4
4,5
11,12
INTA , INTB Pulse Width
12 of 20
DS1386/1386P
READ CYCLE (Note 1)
WRITE CYCLE 1 (Notes 2, 6, 7)
WRITE CYCLE 2 (Notes 2, 8)
13 of 20
DS1386/1386P
TIMING DIAGRAM: INTERRUPT OUTPUTS PULSE MODE
(SEE NOTES 11 AND 12)
POWER-DOWN/POWER-UP TIMING
14 of 20
AC ELECTRICAL CHARACTERISTICS POWER-UP/POWER-DOWN TDIMS1I3N86G/1386P
(0LC to 70LC)
PARAMETER
SYMBOL
MIN
MAX
UNITS
NOTES
tPF
0
ns
CE High to Power Fail
Recovery at Power Up
VCC Slew Rate Power Down
tREC
200
ms
µs
tF
300
10
4.0≤VCC≤4.5V
VCC Slew Rate Power Down
tFB
µs
3.0≤VCC≤4.25V
VCC Slew Rate Power Up
Expected Data Retention
WARNING:
tR
0
µs
4.5V≥VCC≥4.0V
tDR
10
years
9
Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery
backup mode.
15 of 20
DS1386/1386P
NOTES
1. WE is high for a read cycle.
2. OE = VIH or VIL. If OE = VIH during write cycle, the output buffers remain in a high impedance
state.
3. tWP is specified as the logical AND of the CE and WE. tWP is measured from the latter of CE or WE
going low to the earlier of CE or WE going high.
4. tDS or tDH are measured from the earlier of CE or WE going high.
5. tDH is measured from WE going high. If CE is used to terminate the write cycle, then tDH = 20 ns for
-120 parts and tDH = 25 ns for -150 parts.
6. If the CE low transition occurs simultaneously with or later than the WE low transition in write cycle
1, the output buffers remain in a high impedance state during this period.
7. If the CE high transition occurs prior to or simultaneously with the WE high transition, the output
buffers remain in a high impedance state during this period.
8. If WE is low or the WE low transition occurs prior to or simultaneously with the CE low transition,
the output buffers remain in a high impedance state during this period.
9. Each DS1386 is marked with a four-digit date code AABB. AA designates the year of manufacture.
BB designates the week of manufacture. The expected tDR is defined for DIP modules as starting at
the date of manufacture.
10. All voltages are referenced to ground.
11. Applies to both interrupt pins when the alarms are set to pulse.
12. Interrupt output occurs within 100 ns on the alarm condition existing.
13. Both INTA and INTB ( INTB ) are open drain outputs.
14. Real-Time Clock modules (DIP) can be successfully processed through conventional wave-soldering
techniques as long as temperature exposure to the lithium energy source contained within does not
exceed +85°C. Post solder cleaning with water washing techniques is acceptable, provided that
ultrasonic vibration is not used.
In addition, for the PowerCap version:
a. Dallas Semiconductor recommends that PowerCap module bases experience one pass through solder
reflow oriented with the label side up (“live-bug”).
b. Hand soldering and touch-up: Do not touch or apply the soldering iron to leads for more than
3 (three) seconds. To solder, apply flux to the pad, heat the lead frame pad and apply solder. To
remove the part, apply flux, heat the lead frame pad until the solder reflows and use a solder wick to
remove solder.
16 of 20
DS1386/1386P
AC TEST CONDITIONS:
AC TEST CONDITIONS
Output Load 50 pF + 1TTL Gate
Input Pulse Levels: 0-3.0V
Timing Measurement Reference Levels
Input: 1.5V
Input Levels:
0V to 3V
5 ns
Transition Times:
Output: 1.5V
Input Pulse Rise and Fall Times: 5 ns
DS1386 32-PIN 740-MIL MODULE
PKG
DIM
A IN
MM
B IN
MM
C IN
MM
D IN
MM
E IN
MM
F IN
MM
G IN
MM
H IN
MM
J IN
32-PIN
MIN
MAX
1.740
44.20
0.740
18.80
0.365
9.27
1.680
42.67
0.715
18.16
0.335
8.51
0.075
1.91
0.105
2.67
0.015
0.38
0.030
0.76
0.140
3.56
0.180
4.57
0.090
2.29
0.110
2.79
0.590
14.99
0.010
0.25
0.630
16.00
0.018
0.46
MM
K IN
MM
0.015
0.38
0.025
0.64
17 of 20
DS1386/1386P
DS1386P
PKG
DIM
A
INCHES
NOM
0.925
0.985
-
0.055
0.050
0.020
0.027
MIN
0.920
0.980
-
0.052
0.048
0.015
0.025
MAX
0.930
0.990
0.080
0.058
0.052
0.025
0.030
B
C
D
E
F
G
NOTE:
For the PowerCap Version:
a.
Dallas Semiconductor recommends that PowerCap module bases experience one pass though
solder reflow oriented with the label side up (“live-bug”).
b.
Hand soldering and touch-up: do not touch or apply the soldering iron to leads for more than
3 seconds. To solder, apply flux to the pad, heat the lead frame pad and apply solder. To remove
the part, apply flux, heat the lead frame pad until the solder reflows and use a solder wick to
remove solder.
18 of 20
DS1386/1386P
DS1386P WITH DS9034PCX ATTACHED
PKG
DIM
A
INCHES
NOM
0.925
0.960
0.245
0.055
0.050
0.020
0.025
MIN
0.920
0.955
0.240
0.052
0.048
0.015
0.020
MAX
0.930
0.965
0.250
0.058
0.052
0.025
0.030
B
C
D
E
F
G
19 of 20
DS1386/1386P
RECOMMENDED POWERCAP MODULE LAND PATTERN
PKG
DIM
A
INCHES
MIN NOM
MAX
-
-
-
-
-
1.050
0.826
0.050
0.030
0.112
-
-
-
-
-
B
C
D
E
20 of 20
相关型号：
DS1386P-32-120+
Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, ROHS COMPLIANT, POWERCAP MODULE-34
MAXIM
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