Datasheet > ADM9240ARUZ-REEL

ADM9240ARUZ-REEL

更新时间： 2024-02-06 04:59:51

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管
页数	文件大小	规格书
22页	280K
描述
IC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO24, TSSOP-24, Power Management Circuit

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ADM9240ARUZ-REEL 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Transferred	零件包装代码：	TSSOP
包装说明：	TSSOP-24	针数：	24
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.15
可调阈值：	NO	模拟集成电路 - 其他类型：	POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：	R-PDSO-G24	JESD-609代码：	e3
长度：	7.8 mm	信道数量：	1
功能数量：	1	端子数量：	24
最高工作温度：	125 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	1.1 mm	最大供电电压 (Vsup)：	5.75 V
最小供电电压 (Vsup)：	2.85 V	标称供电电压 (Vsup)：	5 V
表面贴装：	YES	温度等级：	AUTOMOTIVE
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	4.4 mm
Base Number Matches：	1

ADM9240ARUZ-REEL 数据手册

ADM9240

GENERAL D ESCRIP TIO N

INTERNAL REGISTERS O F TH E AD M9240

T he ADM9240 is a complete system hardware monitor for

microprocessor-based systems. T he device communicates with

the system via a serial System Management Bus. T he serial bus

controller has two hardwired address lines for device selection

(Pin 1 and Pin 2), a serial data line for reading and writing

addresses and data (Pin 3), and an input line for the serial clock

(Pin 4). All control and programming functions of the ADM9240

are performed over the serial bus.

A brief description of the ADM9240’s principal internal regis-

ters is given below. More detailed information on the function

of each register is given in T ables V to XVII.

Configur ation Register : Provides control and configuration.

Ser ial Addr ess Register : Stores the serial bus address of the

ADM9240.

Addr ess P ointer Register : Contains the address that selects

one of the other internal registers. When writing to the ADM9240,

the first byte of data is always a register address, which is written

to the Address Pointer Register.

An on-chip analog-to-digital converter with six multiplexed

analog inputs measures power supply voltages (+12 V, +5 V,

+3.3 V, +2.5 V—Pins 15 to 18) and processor core voltages

(+V_CCP1and +V_CCP2—Pins 19 and 14). T he ADC also accepts

input from an on-chip bandgap temperature sensor that moni-

tors system ambient temperature.

Inter r upt (INT) Status Register s: T wo registers to provide

status of each Interrupt event.

Inter r upt (INT) Mask Register s: Allow masking of indi-

T wo count inputs (Pins 5 and 6) are provided for monitoring

the speed of fans with tachometer outputs. T o accommodate

fans with different speeds and different tacho outputs, a divisor

of 1, 2, 4 or 8 can be programmed into the counter.

vidual Interrupt sources.

Tem per atur e Configur ation Register : T he configuration of

the temperature interrupt is controlled by the lower three bits of

this register.

Five digital inputs (VID4 to VID0—Pins 20 to 24) read the

processor Voltage ID code, while a chassis intrusion input

(Pin 7) is provided to detect unauthorized tampering with the

equipment.

VID /Fan D ivisor Register s: T he status of the VID0 to VID4

pins of the processor can be written to and read from these

registers. Divisor values for fan-speed measurement are also

stored in one of these registers.

When the ADM9240 monitoring sequence is started, it cycles

sequentially through the measurement of analog inputs and the

temperature sensor, while at the same time the fan speed inputs

are independently monitored. Measured values from these in-

puts are stored in value registers. T hese can be read out over the

serial bus, or can be compared with programmed limits stored

in the limit registers. T he results of out-of-limit comparisons are

stored in the interrupt status registers and will generate an inter-

rupt on the INT line (Pin 10).

Value and Lim it Register s: T he results of analog voltage

inputs, temperature and fan speed measurements are stored in

these registers, along with their limit values.

Analog O utput Register : T he code controlling the analog

output DAC is stored in this register.

Chassis Intr usion Clear Register : A signal latched on the

chassis intrusion pin can be cleared by writing to this register.

Any or all of the Interrupt Status Bits can be masked by appro-

priate programming of the Interrupt Mask Register.

A RESET input/output (Pin 12) is provided. Pulling this pin

low will reset all ADM9240 internal registers to default values.

T he ADM9240 can also be programmed to give a low-going

20 ms reset pulse at this pin.

T he ADM9240 contains an on-chip, 8-bit digital-to-analog

converter with an output range of zero to 1.25 V (Pin 11). T his

is typically used to implement a temperature-controlled fan by

controlling the speed of a fan dependent upon the temperature

measured by the on-chip temperature sensor.

T esting of board level connectivity is simplified by providing a

NAND tree test function. T he AOUT (Pin 11) also doubles as

a NAND test input, while Pin 1 doubles as a NAND tree output.

–6–

REV. 0

1...3 4 567 8 9...22

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