- 鎮ㄧ従(xi脿n)鍦ㄧ殑浣嶇疆锛�璨疯常IC缍�(w菐ng) > PDF鐩寗1994 > DS3232SN#T&R (Maxim Integrated Products)IC RTC W/TCXO 20-SOIC PDF璩囨枡涓嬭級
鍙冩暩(sh霉)璩囨枡
| 鍨嬭櫉(h脿o)锛� | DS3232SN#T&R |
| 寤犲晢锛� | Maxim Integrated Products |
| 鏂囦欢闋�(y猫)鏁�(sh霉)锛� | 19/19闋�(y猫) |
| 鏂囦欢澶�?銆�?/td> | 0K |
| 鎻忚堪锛� | IC RTC W/TCXO 20-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� | 1,000 |
| 椤炲瀷锛� | 鏅�(sh铆)閻�/鏃ユ |
| 鐗归粸(di菐n)锛� | 璀﹀牨(b脿o)鍣紝闁忓勾锛屾柟娉㈣几鍑�锛孴CXO/鏅堕珨 |
| 瀛樺劜(ch菙)瀹归噺锛� | 236B |
| 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� | 2.3 V ~ 5.5 V |
| 闆诲 - 闆绘簮锛岄浕姹狅細 | 2.3 V ~ 5.5 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� | 20-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 | 20-SOIC W |
| 鍖呰锛� | 甯跺嵎 (TR) |
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Extremely Accurate I2C RTC with
Integrated Crystal and SRAM
Pin Description
PIN
NAME
FUNCTION
1, 2,
7鈥�14, 19
N.C.
No Connection. Not connected internally. Must be connected to ground.
3
32kHz
32kHz Push-Pull Output. If disabled with either EN32kHz = 0 or BB32kHz = 0, the state of the 32kHz pin
will be low.
4
VCC
DC Power Pin for Primary Power Supply. This pin should be decoupled using a 0.1渭F to 1.0渭F capacitor.
5
INT/SQW
Active-Low Interrupt or Square-Wave Output. This open-drain pin requires an external pullup resistor. It can
be left open if not used. This multifunction pin is determined by the state of the INTCN bit in the Control
Register (0Eh). When INTCN is set to logic 0, this pin outputs a square wave and its frequency is
determined by RS2 and RS1 bits. When INTCN is set to logic 1, then a match between the timekeeping
registers and either of the alarm registers activates the
INT/SQW pin (if the alarm is enabled). Because the
INTCN bit is set to logic 1 when power is first applied, the pin defaults to an interrupt output with alarms
disabled. The pullup voltage can be up to 5.5V, regardless of the voltage on VCC. If not used, this pin can
be left unconnected.
6
RST
Active-Low Reset. This pin is an open-drain input/output. It indicates the status of VCC relative to the
VPF specification. As VCC falls below VPF, the
RST pin is driven low. When VCC exceeds VPF, for tRST, the
RST pin is driven high impedance. The active-low, open-drain output is combined with a debounced
pushbutton input function. This pin can be activated by a pushbutton reset request. It has an internal 50k
nominal value pullup resistor to VCC. No external pullup resistors should be connected. If the crystal
oscillator is disabled, tRST is bypassed and
RST immediately goes high.
15
GND
Ground
16
VBAT
Backup Power-Supply Input. When using the device with the VBAT input as the primary power source, this
pin should be decoupled using a 0.1渭F to 1.0渭F low-leakage capacitor. When using the device with the
VBAT input as the backup power source, the capacitor is not required. If VBAT is not used, connect to
ground. The device is UL recognized to ensure against reverse charging when used with a primary lithium
battery. Go to www.maxim-ic.com/qa/info/ul.
17
SDA
Serial-Data Input/Output. This pin is the data input/output for the I2C serial interface. This open-drain pin
requires an external pullup resistor. The pullup voltage can be up to 5.5V, regardless of the voltage on VCC.
18, 20
SCL
Serial-Clock Input. This pin is the clock input for the I2C serial interface and is used to synchronize data
movement on the serial interface. A connection to only one of the pins is required. The other pin must be
connected to the same signal or be left unconnected. Up to 5.5V can be used for this pin, regardless of the
voltage on VCC.
power failures and to automatically switch to the back-
up supply when necessary. The RST pin provides an
external pushbutton function and acts as an indicator of
a power-fail event. Also available are 236 bytes of gen-
eral-purpose battery-backed SRAM.
Operation
The block diagram shows the main elements of the
DS3232. The eight blocks can be grouped into four
functional groups: TCXO, power control, pushbutton
function, and RTC. Their operations are described sep-
arately in the following sections.
32kHz TCXO
The temperature sensor, oscillator, and control logic
form the TCXO. The controller reads the output of the
on-chip temperature sensor and uses a lookup table to
determine the capacitance required, adds the aging
correction in AGE register, and then sets the capaci-
tance selection registers. New values, including
changes to the AGE register, are loaded only when a
change in the temperature value occurs. The tempera-
ture is read on initial application of VCC and once every
64 seconds (default, see the description for CRATE1
and CRATE0 in the control/status register) afterwards.
DS3232
9
Maxim Integrated
鐩搁棞(gu膩n)PDF璩囨枡 |
PDF鎻忚堪 |
|---|---|
| DS3234S# | IC RTC W/TCXO 20-SOIC |
| DS32C35-33#T&R | IC RTC ACCURATE I2C 3.3V 20-SOIC |
| DS3911T+ | IC DAC 10BIT I2C QUAD 14TDFN |
| DS4000KI/WBGA | IC OSC TCXO 19.44MHZ 24-BGA |
| DS4026S+WCN | IC OSC TCXO 25MHZ 16-SOIC |
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 |
|---|---|
| DS3234 | 鍒堕€犲晢:MAXIM 鍒堕€犲晢鍏ㄧū:Maxim Integrated Products 鍔熻兘鎻忚堪:Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
| DS3234_07 | 鍒堕€犲晢:MAXIM 鍒堕€犲晢鍏ㄧū:Maxim Integrated Products 鍔熻兘鎻忚堪:Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
| DS3234_08 | 鍒堕€犲晢:MAXIM 鍒堕€犲晢鍏ㄧū:Maxim Integrated Products 鍔熻兘鎻忚堪:Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
| DS3234_10 | 鍒堕€犲晢:MAXIM 鍒堕€犲晢鍏ㄧū:Maxim Integrated Products 鍔熻兘鎻忚堪:Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
| DS3234_BREAKOUT_ | 鍒堕€犲晢:MCM 鍔熻兘鎻忚堪:DS3234 BREAKOUT BOARD 鍒堕€犲晢:PREMIER FARNELL 鍔熻兘鎻忚堪:DS3234 BREAKOUT BOARD |
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