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W83772G Winbond H/W Monitoring IC
Date:
05/22/2006
Revision: 1.0
W83772G
W83772G Data Sheet Revision History
PAGES DATES VERSION VERSION ON WEB MAIN CONTENTS
1 2 3 4 5
n.a.
07/26/05 08/10/05 08/25/05 10/31/05 03/01/06
0.1 0.2 0.31 0.32 0.5
NA
For Winbond internal use only For Winbond internal use only For Winbond internal use only 1. Change part number from W83L772G to W83772G. 2. Modify the top marking Preliminary datasheet. 1. Update Chap 3. 2. Update Chap7.6 and Chap 7.7 description. 3. Add Chap 7.3
6
05/22/06
1.0
4. Add Chap 8: PCB Layout Guide 5. Update Chap 9 6. Update Chap 10.2: DC Characteristic Table for SST, ADDx and D+ pin 7. Add Chap 11: Order Information
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Publication Release Date: May 22, 2006 Version: 1.0
W83772G
Table of Content1. 2. GENERAL DESCRIPTION ......................................................................................................... 1 FEATURES ................................................................................................................................. 1 2.1 2.2 2.3 3. 4. 5. 6. 7. Monitoring Items - Temperature ..............................................................................................1 General .....................................................................................................................................1 Package....................................................................................................................................1
KEY SPECIFICATIONS .............................................................................................................. 2 BLOCK DIAGRAM ...................................................................................................................... 2 PIN CONFIGURATION ............................................................................................................... 3 PIN DESCRIPTION..................................................................................................................... 3 FUNCTIONAL DESCRIPTION.................................................................................................... 4 7.1 7.2 7.3 7.4 7.5 7.6 7.7 General Description..................................................................................................................4 Access Interface.......................................................................................................................4 Power-On Reset.......................................................................................................................4 Measured Temperature Data Format......................................................................................5 Sensor Error Conditions...........................................................................................................5 Conversion Time ......................................................................................................................5 Address Selection ....................................................................................................................5
8. 9. 10.
PCB LAYOUT GUIDE ................................................................................................................. 7 COMMAND SUMMARY.............................................................................................................. 8 ELECTRICAL CHARACTERISTIC ............................................................................................. 9 10.1 10.2 10.3 Absolute Maximum Ratings .....................................................................................................9 DC Characteristics ...................................................................................................................9 AC Characteristics..................................................................................................................10
11. 12. 13.
ORDER INSTRUCTION............................................................................................................ 11 TOP MARKING ......................................................................................................................... 11 PACKAGE SPECIFICATION .................................................................................................... 12
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W83772G
1. GENERAL DESCRIPTION
W83772G is a 2-channel temperature sensor with Simple Serial Transport (SST) interface. W83772G has an on-chip thermal sensor and a remote temperature sensor. The remote temperature sensor input could be connected to thermal diode or transistor such as 2N3904. A 10-bit ADC (Analog-toDigital Converter) is built inside W83772G to convert the monitored temperature value with 0.125C resolution. W83772G is a high precision, low-power consumption IC supporting 1.5V SST interface. The package type is 8-pin, TSSOP, and the operating voltage is 3.3 V 10%.
2. FEATURES
2.1
* * *
Monitoring Items - Temperature
Measure temperature with high accuracy One on-chip thermal sensor One remote temperature sensor
2.2
* * * *
General
3.3V10% VCC operation 16-bit two's complement data format, 0.125C resolution Two address selection pins Support Simple Serial Transport interface
2.3
*
Package
8-pin TSSOP
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Publication Release Date: May 22, 2006 Version: 1.0
W83772G
3. KEY SPECIFICATIONS
* On-die temperature range and accuracy 0C to 70C 3C (over entire range) 1C (40C to 70C) Remote temperature range and accuracy -30C to +127.875C 3C (over entire range) 1C (40C to 90C) Supply voltage 3.3V 10% Operating supply current 5.6 mA typ. ADC resolution 10 Bits Operating Temperature Range 0C to 70C
*
* * * *
4. BLOCK DIAGRAM
VCC
xI
Control Logic
Command Coder / Decoder
SST SST
SW
D+ DSenso r Circuit ADC
Local / Remote BANK Temperature Registers Configuration Registers Status Registers Address Selector
ADD0 ADD1
Internal Thermal Diode
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W83772G
5. PIN CONFIGURATION
VCC GND D+ D-
1 2 3 W83772G 4
8 7 6 5
SST ADD0 RES ADD1
6. PIN DESCRIPTION
PIN NAME NO PIN TYPE DESCRIPTION
VCC GND D+ DADD1 RES ADD0
1 2 3 4 5 6 7
POWER GROUND AIN AIN IO
DC Power Supply Voltage Input 3.3V10%. Power Supply Ground Connect to Thermal Diode Anode Connect to Thermal Diode Cathode For Address select Reserved
IO
For Address select
SST
8
IO
Simple Serial Transport (SST) Interface
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Publication Release Date: May 22, 2006 Version: 1.0
W83772G
7. FUNCTIONAL DESCRIPTION
7.1 General Description
The W83772G provides one remote temperature sensor input which could be connected to 2N3904 transistors, or CPU/GPU thermal diode, and one local on-die thermal sensor to detect ambient temperature. The data format of monitored temperature is 16-bit 2's complement with 1-wire SST access interface.
7.2
Access Interface
The W83772G provides SST interface to read/write internal registers, and the SST address is xxxxxxxxb, respectively. Please refer to 7.7 Address Selection.
7.3
Power-On Reset
The power-on reset threshold is 2.7V (typical). When Vcc crosses this threshold, the internal reset signal will be asserted for 4mS. During this time period, W83772G is in the reset state. When the internal reset signal is de-asserted, W83772G is in the operating state. In the operating state, if Vcc drops below 2.4V and then rises above 2.7, the internal reset signal will be asserted immediately. Fig 1 illustrates the reset mechanism. .
3.3V VCC 2.7V 2.4V
0 3.3V Internal Reset Signal 2.7V 4ms 4ms
Figure 1.
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W83772G
7.4 Measured Temperature Data Format
The W83772G temperature data format of both remote and local temperature are 16-bit two's complement format. Table 1 shows temperature data with 16-bit two's complement data format.
TEMPERATURE 16-BIT DIGITAL OUTPUT
+80C +79.875C +1C +0C -1C - 5C
0001 0100 0000 0000 0001 0011 1111 1000 0000 0000 0100 0000 0000 0000 0000 0000 1111 1111 1100 0000 1111 1110 1100 0000
Table 1. Temperature Data Format
7.5
Sensor Error Conditions
When the external diode is opened or shorted, the W83772G will return 0x8001 in response to either the SST command GetExtTemp() or GetAllTemp() command. It will also return 0x8002/0x8003 when detecting temperature below -128C /above +128C.
7.6
Conversion Time
W83772G provide 250mS conversion time for monitoring all temperature readings. The conversion time is related to the internal self-generated clock. The internal clock frequency is dependent on the temperature. There is 10% frequency deviation in the operating temperature range of 0C and 70C.
7.7
Address Selection
W83772G has two address pins. These pins may be either tied to Vcc, ground or left open. After the internal reset ends, W83772G pin ADD0/ADD1 will start to drive and sink current to detect the pin status - HIGH, LOW or FLOATING and then decide the SST address of W83772G. The address will be retained as long as the VCC of W83772G is maintained. The recommended pull-up or pull-down resistor value is 330. (Please refer to the DC specification for the source and sink current.) The pullup power plane must be the same as the VCC power of W83772G.
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Publication Release Date: May 22, 2006 Version: 1.0
W83772G
VCC
VCC
R=330 VCC GND ADDx VCC GND W83772G R=330 ADDx
W83772G
VCC
VCC GND
ADDx
NC(Floating)
W83772G
Figure 2.
The address mapping is shown in the following table.
ADD0 ADD1 ADDRESS
Ground Open Vcc Ground Open Vcc Ground Open Vcc
Ground Ground Ground open open open Vcc Vcc Vcc
0x48 0x49 0x4a 0x4b 0x4c 0x4d 0x4e 0x4f 0x50
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W83772G
8. PCB LAYOUT GUIDE
Pin 3 & Pin 4 are typically connected to a thermal diode. Here are some recommendations for optimal operation: a) Place remote diode as close as possible to W83772G. b) Route D+ and D- lines away from clock generators, memory buses, or any high frequency buses. c) Place shield traces, which are connecting to board ground, flanking D+/D- to shield the noise. d) It is recommended that the bypass capacitor with 2200pF should be placed close to W83772G to filter the noise from motherboard digital signals. e) Place a 0.1uF bypass capacitor close to the VCC pin. The connection diagram is shown as the following.
W83772G D+
GND 2200pf DGND
Figure 3.
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Publication Release Date: May 22, 2006 Version: 1.0
W83772G
9. COMMAND SUMMARY
The following table shows the supported SST commands. Contact Winbond for details of the commands. NDA may be required to furnish the information.
COMMAND DESCRIPTION
Ping() ResetDevice() GetIntTemp() GetExtTemp() GetAllTemps()
Returns a non-zero FCS over the header W83772G will perform a functional reset similar to power-on reset Returns the temperature of W83772G internal thermal sensor Returns the temperature of W83772G external thermal diode Returns a 4-byte block of data (internal plus external temperatures)
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W83772G
10. ELECTRICAL CHARACTERISTIC
10.1 Absolute Maximum Ratings
PARAMETER RATING UNIT
Power Supply Voltage Operating Temperature Storage Temperature
3.63 70 -30 to +127.875
V C C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
10.2 DC Characteristics
(Ta = 0 C to 70 C, Vcc = 3.3V 10%, GND = 0V)
PARAMETER SYM. MIN. TYP. MAX. UNIT CONDITIONS
SST - This set of DC electrical specifications is used with devices normally operating from a +1.5V interface supply voltage. The following voltage and current requirements refer to the SST electrical model. For the purpose of bus capacitance, the electrical model is a two-node circuit. One node is counted for each client and one node for the system host. VSSTIO is the internally generated +1.5V supply voltage for the SST interface. IO pad power supply Input Voltage range Input Low Threshold Voltage Input High Threshold Voltage Hysteresis Output source current Input High Leakage Input Low Leakage VSSTIO Vin Vt0.40 1.40 1.50 1.60 VSSTIO +0.3 0.65 V VSSTIO = 1.4V (MIN) VSSTIO = 1.6V (MAX) Vt+ 0.8 1.10 V VSSTIO = 1.4V (MIN) VSSTIO = 1.6V (MAX) VTH Isource ILIH ILIL 0.15 -6.0 +10 -10 V mA A A Voh=1.1V, VSSTIO =1.4V VSST = VSSTIO VSST = 0V
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Publication Release Date: May 22, 2006 Version: 1.0
W83772G
DC Characteristics, continued
PARAMETER
SYM.
MIN.
TYP.
MAX.
UNIT
CONDITIONS
ADDx Power Supply Voltage Input Voltage range Input High Voltage Input Low Voltage Output source current Output sink current D+ Ouput Current I1 Output Current I2 I1 I2 15 165 uA uA Vcc = 3.3 V Vcc = 3.3 V Isource Isink -0.7 0.7 Vcc Vin Vth 2.97 -0.3 1.95 1.35 -3 2 3.30 3.63 Vcc+0.3 V V V V mA mA Voh=2.4V, Vcc=2.97V Vol=0.4V, Vcc=2.97V
10.3 AC Characteristics
Refer to the specification of Simple Serial Transport (SST).
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W83772G
11. ORDER INSTRUCTION
PART NO. PACKAGE REMARKS
W83772G
TSSOP8
Pb-free Package
12. TOP MARKING
The top marking of W83772G
772W LUA 540A
1st line: type number: 772G 2nd line: assembly house ID + internal code L UA L: Lingsen 3rd line: Tracking code 540 G 540: packages made in '05, week 40 A: IC revision
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Publication Release Date: May 22, 2006 Version: 1.0
W83772G
13. PACKAGE SPECIFICATION
TSSOP 8L 3mm X 3mm
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W83772G
Important Notice
Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
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Publication Release Date: May 22, 2006 Version: 1.0

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