DS1338 I2C RTC with 56-Byte NV RAM 7 of 16 PIN DESCRIPTION PIN NAME FUNCTION 8 1" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� DS1338C-18#
寤犲晢锛� Maxim Integrated Products
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 14/16闋�(y猫)
鏂囦欢澶у皬锛� 0K
鎻忚堪锛� IC RTC 56BIT NV SRAM 16-SOIC
鐢�(ch菐n)鍝佸煿瑷�(x霉n)妯″锛� Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 45
椤炲瀷锛� 鏅�(sh铆)閻�/鏃ユ
鐗归粸(di菐n)锛� 闁忓勾锛孨VSRAM锛屾柟娉㈣几鍑�
瀛樺劜(ch菙)瀹归噺锛� 56B
鏅�(sh铆)闁撴牸寮忥細 HH:MM:SS锛�12/24 灏忔檪(sh铆)锛�
鏁�(sh霉)鎿�(j霉)鏍煎紡锛� YY-MM-DD-dd
鎺ュ彛锛� I²C锛�2 绶氫覆鍙�
闆绘簮闆诲锛� 1.71 V ~ 5.5 V
闆诲 - 闆绘簮锛岄浕姹狅細 1.3 V ~ 3.7 V
宸ヤ綔婧害锛� -40°C ~ 85°C
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
灏佽/澶栨锛� 16-SOIC锛�0.295"锛�7.50mm 瀵級
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 16-SOIC W
鍖呰锛� 绠′欢
DS1338 I2C RTC with 56-Byte NV RAM
7 of 16
PIN DESCRIPTION
PIN
NAME
FUNCTION
8
16
1
鈥�
X1
32.768kHz Crystal Connections. The internal oscillator circuitry is designed for
operation with a crystal having a specified load capacitance (CL) of 12.5pF. An
external 32.768kHz oscillator can also drive the DS1338. In this configuration,
the X1 pin is connected to the external oscillator signal and the X2 pin is left
unconnected.
Note: For more information about crystal selection and crystal layout considerations,
refer to Application Note 58: Crystal Considerations with Dallas Real-Time Clocks.
2
鈥�
X2
3
14
VBAT
Backup Supply Input for Lithium Cell or Other Energy Source. Battery voltage
must be held between the minimum and maximum limits for proper operation.
Diodes placed in series between the backup source and the VBAT pin may
prevent proper operation. If a backup supply is not required, VBAT must be
grounded. UL recognized to ensure against reverse charging when used with a
lithium cell. For more information, visit www.maxim-ic.com/qa/info/ul.
4
15
GND
Ground. DC power is provided to the device on these pins. VCC is the primary
power input. When voltage is applied within normal limits, the device is fully
accessible and data can be written and read. When a backup supply is
connected to the device and VCC is below VPF, reads and writes are inhibited.
However, the timekeeping function continues unaffected by the lower input
voltage.
5
16
SDA
Serial Data. Input/output pin for the I2C serial interface. It is an open drain
output and requires an external pullup resistor. The pull up voltage may be up
to 5.5V regardless of the voltage on VCC.
6
1
SCL
Serial Clock. Input pin for the I2C serial interface. Used to synchronize data
movement on the serial interface. The pull up voltage may be up to 5.5V
regardless of the voltage on VCC.
7
2
SQW/OUT
Square-Wave/Output Driver. When enabled and the SQWE bit set to 1, the
SQW/OUT pin outputs one of four square-wave frequencies (1Hz, 4kHz, 8kHz,
32kHz). It is an open drain output and requires an external pullup resistor.
Operates with either VCC or VBAT applied. The pull up voltage may be up to
5.5V regardless of the voltage on VCC. If not used, this pin may be left
unconnected.
8
3
VCC
Primary Power Supply. When voltage is applied within normal limits, the device
is fully accessible and data can be written and read. When a backup supply is
connected to the device and VCC is below VPF, reads and writes are inhibited.
The backup supply maintains the timekeeping function while VCC is absent.
鈥�
4鈥�13
N.C.
No Connection. These pins are not connected internally, but must be grounded
for proper operation.
DETAILED DESCRIPTION
The DS1338 serial RTC is a low-power, full BCD clock/calendar plus 56 bytes of NV SRAM. Address and data are
transferred serially through an I2C interface. The clock/calendar provides seconds, minutes, hours, day, date,
month, and year information. The end of the month date is automatically adjusted for months with fewer than 31
days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM
indicator. The DS1338 has a built-in power-sense circuit that detects power failures and automatically switches to
the VBAT supply.
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
DS1673S-5+T&R IC CTRLR SYSTEM PORT 5V 20-SOIC
DS1806E-010+ IC POT DIG SEXTET 10K 20-TSSOP
MAX5421AEUB+ IC VOLTAGE DIVIDER DGLT 10MSOP
MS3450W22-4S CONN RCPT 4POS WALL MNT W/SCKT
MAX5431AEUB+ IC VOLTAGE DIVIDER PGA 10-UMAX
鐩搁棞(gu膩n)浠g悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉)
鍙冩暩(sh霉)鎻忚堪
DS1338C-18# 鍔熻兘鎻忚堪:瀵�(sh铆)鏅�(sh铆)鏅�(sh铆)閻� I2C Serial RTC w/56 Byte NV RAM RoHS:鍚� 鍒堕€犲晢:Microchip Technology 鍔熻兘:Clock, Calendar. Alarm RTC 绺界窔鎺ュ彛:I2C 鏃ユ湡鏍煎紡:DW:DM:M:Y 鏅�(sh铆)闁撴牸寮�:HH:MM:SS RTC 瀛樺劜(ch菙)瀹归噺:64 B 闆绘簮闆诲-鏈€澶�:5.5 V 闆绘簮闆诲-鏈€灏�:1.8 V 鏈€澶у伐浣滄韩搴�:+ 85 C 鏈€灏忓伐浣滄韩搴�: 瀹夎棰�(f膿ng)鏍�:Through Hole 灏佽 / 绠遍珨:PDIP-8 灏佽:Tube
DS1338C-18+ 鍒堕€犲晢:Maxim Integrated Products 鍔熻兘鎻忚堪:REAL TIME CLOCK SERL 56BYTE 16SOIC - Bulk
DS1338C-3 鍔熻兘鎻忚堪:瀵�(sh铆)鏅�(sh铆)鏅�(sh铆)閻� RoHS:鍚� 鍒堕€犲晢:Microchip Technology 鍔熻兘:Clock, Calendar. Alarm RTC 绺界窔鎺ュ彛:I2C 鏃ユ湡鏍煎紡:DW:DM:M:Y 鏅�(sh铆)闁撴牸寮�:HH:MM:SS RTC 瀛樺劜(ch菙)瀹归噺:64 B 闆绘簮闆诲-鏈€澶�:5.5 V 闆绘簮闆诲-鏈€灏�:1.8 V 鏈€澶у伐浣滄韩搴�:+ 85 C 鏈€灏忓伐浣滄韩搴�: 瀹夎棰�(f膿ng)鏍�:Through Hole 灏佽 / 绠遍珨:PDIP-8 灏佽:Tube
DS1338C-3# 鍔熻兘鎻忚堪:瀵�(sh铆)鏅�(sh铆)鏅�(sh铆)閻� I2C Serial RTC w/56 Byte NV RAM RoHS:鍚� 鍒堕€犲晢:Microchip Technology 鍔熻兘:Clock, Calendar. Alarm RTC 绺界窔鎺ュ彛:I2C 鏃ユ湡鏍煎紡:DW:DM:M:Y 鏅�(sh铆)闁撴牸寮�:HH:MM:SS RTC 瀛樺劜(ch菙)瀹归噺:64 B 闆绘簮闆诲-鏈€澶�:5.5 V 闆绘簮闆诲-鏈€灏�:1.8 V 鏈€澶у伐浣滄韩搴�:+ 85 C 鏈€灏忓伐浣滄韩搴�: 瀹夎棰�(f膿ng)鏍�:Through Hole 灏佽 / 绠遍珨:PDIP-8 灏佽:Tube
DS1338C-3+ 鍒堕€犲晢:Maxim Integrated Products 鍔熻兘鎻忚堪:REAL TIME CLOCK SERL 56BYTE 16SOIC - Bulk