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 Features
* * * * * * * * * * * *
Supply Voltage up to 40V RDSon Typically 0.8 at 25C, Maximum 1.8 at 200C Up to 1.0A Output Current Three Half-bridge Outputs Formed by Three High-side and Three Low-side Drivers Capable to Switch all Kinds of Loads Such as DC Motors, Bulbs, Resistors, Capacitors and Inductors No Shoot-through Current Outputs Short-circuit Protected Overtemperature Protection for Each Switch and Overtemperature Prewarning Undervoltage Protection Various Diagnostic Functions Such as Shorted Output, Open-load, Overtemperature and Power-supply Fail Detection Serial Data Interface, Daisy Chain Capable, up to 2 MHz Clock Frequency QFN18 Package
1. Description
The ATA6827 is a fully protected driver IC specially designed for high temperature applications. In mechatronic solutions, for example turbo charger or exhaust gas recirculation systems, many flaps have to be controlled by DC motor driver ICs which are located very close to the hot engine or actuator where ambient temperatures up to 150C are usual. Due to the advantages of SOI technology junction temperatures up to 200C are allowed. This enables new cost effective board design possibilities to achieve complex mechatronic solutions. The ATA6827 is a fully protected Triple Half-Bridge to control up to 3 different loads by a microcontroller in automotive and industrial applications. Each of the 3 high-side and 3 low-side drivers is capable to drive currents up to 1.0A. The drivers are internally connected to form 3 half-bridges and can be controlled separately from a standard serial data interface. Therefore, all kinds of loads such as bulbs, resistors, capacitors and inductors can be combined. The IC design especially supports the application of H-bridges to drive DC motors. Protection is guaranteed regarding short-circuit conditions, overtemperature and undervoltage. Various diagnostic functions and a very low quiescent current in standby mode opens a wide range of applications. Automotive qualification gives added value and enhanced quality for exacting requirements of automotive applications.
High Temperature Triple Half-bridge Driver with Serial Input Control ATA6827 Preliminary
4912C-AUTO-10/06
Figure 1-1.
Block Diagram
n. u.
n. u.
O S C
n. u.
n. u.
n. u.
n. u.
n. u.
n. u.
H S 3
L S 3
H S 2
L S 2
H S 1
L S 1
S R R
10 VS 11
Input register Ouput register
Serial interface
Charge pump L S 1 T P
VS
DI 4 CLK 5
P S F
O P L
S C D
n. u.
n. u.
n. u.
n. u.
n. u.
n. H u. S 3
L S 3
H S 2
L S 2
H S 1
CS 3 INH 8 DO 7 Control logic Power on reset 14 GND 17
Fault detector Fault detector Fault detector Fault detector Fault detector Fault detector
UV protection 9 VCC
GND Thermal protection 18 GND 6
1/2 OUT3
12/13 OUT2
15/16 OUT1
GND
2
ATA6827 [Preliminary]
4912C-AUTO-10/06
ATA6827 [Preliminary]
2. Pin Configuration
Figure 2-1. Pinning QFN18
PGND3 PGND1 OUT1S OUT1F PGND2 OUT2S
OUT3S OUT3 CS DI CLK GND 1 2 3 4 5 6 18 17 16 15 14 13 12 11 10 9 8 7 OUT2 VS VS VCC INH DO
Table 2-1.
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Pin Description
Symbol OUT3S OUT3 CS DI CLK GND DO INH VCC VS VS OUT2 OUT2S PGND2 OUT1F OUT1S PGND1 PGND3 PGND1 PGND3 Function Sense OUT3, internal connected to pin 2 via lead Half-bridge output 3 Chip select input; 5-V CMOS logic level input with internal pull up; low = serial communication is enabled, high = disabled Serial data input; 5-V CMOS logic level input with internal pull down; receives serial data from the control device; DI expects a 16-bit control word with LSB being transferred first Serial clock input; 5-V CMOS logic level input with internal pull down; controls serial data input interface and internal shift register (fmax = 2 MHz) Ground; reference potential Serial data output; 5-V CMOS logic level tri-state output for output (status) register data; sends 16-bit status information to the microcontroller (LSB is transferred first); output will remain tri-stated unless device is selected by CS = low, therefore, several ICs can operate on one data output line only. Inhibit input; 5-V logic input with internal pull down; low = standby, high = normal operation Logic supply voltage (5 V) Power supply for output stages OUT1, OUT2 and OUT3, internal supply Power supply for output stages OUT1, OUT2 and OUT3, internal supply Half-bridge output 2 Sense OUT2, internal connected to pin 12 via bond; OUT2 controlled loads have to be connected to pin 12 OUT2F Power Ground OUT2 Half-bridge output 1 Sense OUT1, internal connected to pin 15 via lead Power Ground OUT1 and OUT3 Power Ground OUT1 and OUT3
3
4912C-AUTO-10/06
3. Functional Description
3.1 Serial Interface
Data transfer starts with the falling edge of the CS signal. Data must appear at DI synchronized to CLK and are accepted on the falling edge of the CLK signal. LSB (bit 0, SRR) has to be transferred first. Execution of new input data is enabled on the rising edge of the CS signal. When CS is high, pin DO is in tri-state condition. This output is enabled on the falling edge of CS. Output data will change their state with the rising edge of CLK and stay stable until the next rising edge of CLK appears. LSB (bit 0, TP) is transferred first. Figure 3-1.
CS
Data Transfer
DI
SRR 0
LS1 1
HS1 2
LS2 3
HS2 4
LS3 5
HS3 6
n. u. 7
n. u. 8
n. u. 9
n. u. 10
n. u. 11
n. u. 12
OCS 13
n. u. 14
n. u. 15
CLK
DO
TP
S1L
S1H
S2L
S2H
S3L
S3H
n. u.
n. u.
n. u.
n. u.
n. u.
n. u.
SCD
OPL
PSF
Table 3-1.
Bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Input Data Protocol
Input Register SRR LS1 HS1 LS2 HS2 LS3 HS3 n. u. n. u. n. u. n. u. n. u. n. u. OCS n. u. n. u. Function Status register reset (high = reset; the bits PSF, OPL and SCD in the output data register are set to low) Controls output LS1 (high = switch output LS1 on) Controls output HS1 (high = switch output HS1 on) See LS1 See HS1 See LS1 See HS1 Not used Not used Not used Not used Not used Not used Overcurrent shutdown (high = overcurrent shutdown is active) Not used Not used
4
ATA6827 [Preliminary]
4912C-AUTO-10/06
ATA6827 [Preliminary]
Table 3-2.
Bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13
Output Data Protocol
Output (Status) Register TP Status LS1 Status HS1 Status LS2 Status HS2 Status LS3 Status HS3 n. u. n. u. n. u. n. u. n. u. n. u. SCD Function Temperature prewarning: high = warning High = output is on, low = output is off; not affected by SRR High = output is on, low = output is off; not affected by SRR Description see LS1 Description see HS1 Description see LS1 Description see HS1 Not used Not used Not used Not used Not used Not used Short circuit detected: set high when at least one high-side or low-side switch is switched off by a short-circuit condition. Bits 1 to 6 can be used to detect the shorted switch. Open load detected: set high, when at least one active high-side or low-side switch sinks/sources a current below the open load threshold current. Power-supply fail: undervoltage at pin VS detected
14 15
OPL PSF
After power-on reset, the input register has the following status:
Bit 15 Bit 14 x x Bit 13 (OCS) H Bit 12 x Bit 11 x Bit 10 x Bit 9 x Bit 8 x Bit 7 x Bit 6 (HS3) L Bit 5 (LS3) L Bit 4 (HS2) L Bit 3 (LS2) L Bit 2 Bit 1 (HS1) (LS1) L L Bit 0 (SRR) L
The following patterns are used to enable internal test modes of the IC. It is not recommended to use these patterns during normal operation.
Bit 15 Bit 14 H H H H H H Bit 13 (OCS) H H H Bit 12 H L L Bit 11 H L L Bit 10 L H L Bit 9 L H L Bit 8 L L H Bit 7 L L H Bit 6 (HS3) L L L Bit 5 (LS3) L L L Bit 4 (HS2) L L L Bit 3 (LS2) L L L Bit 2 Bit 1 (HS1) (LS1) L L L L L L Bit 0 (SRR) L L L
5
4912C-AUTO-10/06
3.2
Power-supply Fail
In case of undervoltage at pin VS, the Power-Supply Fail bit (PSF) in the output register is set and all outputs are disabled. To detect an undervoltage, its duration has to be longer than the undervoltage detection delay time tdUV. The outputs are enabled immediately when supply voltage recovers to a normal operating value. The PSF bit stays high until it is reset by the SRR (Status Register Reset) bit in the input register.
3.3
Open-load Detection
If the current through a high-side or low-side switch in the ON-state stays below the open-load detection threshold, the open-load detection bit (OPL) in the output register is set. The OPL bit stays high until it is reset by the SRR bit in the input register. To detect an open load, its duration has to be longer than the open-load detection delay time tdSd.
3.4
Overtemperature Protection
If the junction temperature of one or more output stages exceeds the thermal prewarning threshold, T jPW set , the temperature prewarning bit (TP) in the output register is set. When the temperature falls below the thermal prewarning threshold, TjPW reset, the bit TP is reset. The TP bit can be read without transferring a complete 16-bit data word. The status of TP is available at pin DO with the falling edge of CS. After the microcontroller has read this information, CS is set high and the data transfer is interrupted without affecting the status of input and output registers. If the junction temperature of one or more output stages exceeds the thermal shutdown threshold, Tj switch off, all outputs are disabled and the corresponding bits in the output register are set to low. The outputs can be enabled again when the temperature falls below the thermal shutdown threshold, Tjswitch on and the SRR bit in the input register is set to high. Hysteresis of thermal prewarning and shutdown threshold avoids oscillations.
3.5
Short-circuit Protection
The output currents are limited by a current regulator. Overcurrent detection is activated by writing a high to the OCS (Overcurrent Shutdown) bit in the input register. When the current in an output stage exceeds the overcurrent limitation and shutdown threshold, it is switched off after a delay time (tdSd). The short-circuit detection bit (SCD) is set and the corresponding status bit in the output register is set to low. For OCS = low the overcurrent shutdown is inactive. The SCD bit is also set if the current exceeds the overcurrent limitation and shutdown threshold, but the outputs are not affected. By writing a high to the SRR bit in the input register the SCD bit is reset and the disabled outputs are enabled.
3.6
Inhibit
Applying 0V to pin 8 (INH) inhibits the ATA6827. All output switches are then turned off and switched to tri-state. The data in the output register is deleted. The output switches can be activated again by switching pin 8 (INH) to 5V which initiates an internal power-on reset.
6
ATA6827 [Preliminary]
4912C-AUTO-10/06
ATA6827 [Preliminary]
4. Absolute Maximum Ratings
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. All values refer to GND pins. Parameters Supply voltage Supply voltage t < 0.5s; IS > -2A Logic supply voltage Logic input voltage Logic output voltage Input current Output current Output current Output voltage Reverse conducting current (tpulse = 150 s) Junction temperature range Storage temperature range Ambient temperature range Pin 10, 11 10, 11 9 3, 4, 5, 8 7 3, 4, 5, 8 7 2, 12, 15 2, 12, 15 2, 12, 15 Symbol VVS VVS VVCC VCS,VDI, VCLK, VINH VDO ICS, IDI, ICLK, IINH IDO IOut3, IOut2, IOut1 IOut3, IOut2, IOut1 IOut3, IOut2, IOut1 Tj TSTG Ta Value -0.3 to +40 -1 -0.3 to +7 -0.3 to VVCC + 0.3 -0.3 to VVCC + 0.3 -10 to +10 -10 to +10 Internally limited, see output specification -0.3 to +40 17 -40 to +200 -55 to +200 -40 to +150 V A C C C Unit V V V V V mA mA
5. Thermal Resistance
Parameters Junction case Junction ambient Notes:
(1)
Test Conditions
Symbol Rthjc RthJA
Value maximum 15 40
Unit K/W K/W
1. Depends on PCB board design
6. Operating Range
Parameters Supply voltage Logic supply voltage Logic input voltage Serial interface clock frequency Junction temperature range Note: Threshold for undervoltage detection Symbol VVS VVCC VCS,VDI, VCLK, VINH fCLK Tj Value VUV
(2)
Unit V V V MHz C
to 40
4.75 to 5.25 -0.3 to VVCC 2 -40 to +200
7
4912C-AUTO-10/06
7. Noise and Surge Immunity
Parameters Conducted interferences Interference suppression ESD (Human Body Model) CDM (Charged Device Model) Note: Test pulse 5: Vsmax = 40V Test Conditions ISO 7637-1 VDE 0879 Part 2 ESD S 5.1 ESD STM 5.3.1-1999 all pins Value Level 4(1) Level 5 2 kV 500V
8. Electrical Characteristics
7.5V < VVS < 40V; 4.75V < VVCC < 5.25 V; INH = High; -40C Tj 200 C; Ta 150C; unless otherwise specified, all values refer to GND pins. No. 1 1.1 1.2 1.3 1.4 1.5 1.6 2 2.1 2.2 2.3 2.4 2.5 3 3.1 3.2 3.3 3.4 3.5 Parameters Current Consumption Quiescent current VS VVS < 20V, INH = low 10, 11 9 IVS IVCC IVS IVCC IVS IVS 0.5 2.0 1 15 4 350 60 40 6 500 5.5 10 A A mA A mA mA A A A A A A 4.75 V < VVCC < 5.25V, Quiescent current VCC INH = low Supply current VS Supply current VCC Discharge current VS Discharge current VS Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
VVS < 20V normal 10, 11 operating, all outputs off 4.75V < VVCC < 5.25V, normal operating VVS = 32.5V, INH = low VVS = 40V, INH = low 9 10, 11 10, 11
Undervoltage Detection, Power-on Reset Power-on reset threshold Power-on reset delay time After switching on VCC 10, 11 10, 11 9 VVCC tdPor VUv VUv tdUV 10 3.1 30 5.5 0.6 40 3.9 95 4.5 190 7.1 V s V V s A A A A A
Undervoltage-detection VCC = 5V threshold Undervoltage-detection VCC = 5V hysteresis Undervoltage-detection delay time Thermal Prewarning and Shutdown Thermal prewarning set Thermal prewarning reset Thermal prewarning hysteresis Thermal shutdown off Thermal shutdown on
TjPW set TjPW reset TjPW Tj switch off Tj switch on
170 155
195 180 15
220 205
C C C
B B B B B
200 185
225 210
250 235
C C
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Delay time between rising edge of the input signal at pin CS after data transmission and switch on output stages to 90% of final level. Device not in standby for t > 1 ms
8
ATA6827 [Preliminary]
4912C-AUTO-10/06
ATA6827 [Preliminary]
8. Electrical Characteristics (Continued)
7.5V < VVS < 40V; 4.75V < VVCC < 5.25 V; INH = High; -40C Tj 200 C; Ta 150C; unless otherwise specified, all values refer to GND pins. No. 3.6 Parameters Thermal shutdown hysteresis Ratio thermal shutdown off/thermal prewarning set Ratio thermal shutdown on/thermal prewarning reset Output Specification (OUT1-OUT3) IOut 1-3 = -0.9A On resistance 4.2 4.3 4.4 High-side output leakage current Low-side output leakage current High-side switch reverse diode forward voltage IOut 1-3 = +0.9A VOut 1-3 = 0V, output stages off VOut 1-3 = VVS, output stages off IOut 1-3 = 1.5A 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 2, 12, 15 RDSOn1-3 RDSOn1-3 IOut1-3 IOut1-3 VOut1-3 - VVS VOut 1-3 IOut1-3 -2 -60 300 1.8 1.8 A A A A A A Test Conditions Pin Symbol Tj switch off Tj switch off/ TjPW set Tj switch on/ TjPW reset 1.05 Min. Typ. 15 Max. Unit C Type* B
3.7
1.15
B
3.8 4 4.1
1.05
1.15
B
4.5
2
V
A
4.6
Low-side switch reverse IOut 1-3 = -1.5A diode forward voltage High-side overcurrent limitation and shutdown 7.5V < VS < 20V threshold Low-side overcurrent limitation and shutdown 7.5V < VS < 20V threshold High-side overcurrent limitation and shutdown 20V < VS < 40V threshold Low-side overcurrent limitation and shutdown 20V < VS < 40V threshold Overcurrent shutdown delay time High-side open-load detection threshold Low-side open-load detection threshold Open-load detection delay time
V
A
4.7
1.0
1.3
1.7
AA
A
4.8
IOut1-3
-1.7
-1.3
-1.0
A
A
4.18
IOut1-3
1.0
1.3
2.0
AA
A
4.19
IOut1-3 tdSd IOut1-3 IOut1-3 tdSd
-2.0
-1.3
-1.0
A
A
4.9 4.10 4.11 4.12
10 -55 5 200 -30 30
40 -5 55 600
s mA mA s
A A A A
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Delay time between rising edge of the input signal at pin CS after data transmission and switch on output stages to 90% of final level. Device not in standby for t > 1 ms
9
4912C-AUTO-10/06
8. Electrical Characteristics (Continued)
7.5V < VVS < 40V; 4.75V < VVCC < 5.25 V; INH = High; -40C Tj 200 C; Ta 150C; unless otherwise specified, all values refer to GND pins. No. 4.13 4.14 4.15 4.16 Parameters Test Conditions Pin Symbol tdon tdon tdoff tdoff tdon - tdoff 1 Min. Typ. Max. 20 20 20 3 Unit s s s s Type* A A A A High-side output switch VVS = 13V RLoad = 30 on delay(1) Low-side output switch VVS = 13V on delay(1) RLoad = 30 High-side output switch VVS = 13V off delay(1) RLoad = 30 Low-side output switch VVS = 13V off delay(1) RLoad = 30 Dead time between corresponding highand low-side switches Input voltage low-level threshold Input voltage high-level threshold Hysteresis of input voltage Pull-down current pin DI, CLK, INH Pull-up current Pin CS VDI, VCLK, VINH = VCC VCS = 0V VVS = 13V RLoad = 30
4.17 5 5.1 5.2 5.3 5.4 5.5 6 6.1 6.2 6.3 7 7.1
s
A
Logic Inputs DI, CLK, CS, INH 3, 4, 5, 8 3, 4, 5, 8 3, 4, 5, 8 4, 5, 8 3 VIL VIH VI IPD IPU 50 5 -70 0.3 x VVCC 0.7 x VVCC 700 70 -5 V V mV A A A A B A A
Serial Interface - Logic Output DO Output-voltage low level IDOL = 2 mA Output-voltage high level Leakage current (tri-state) Inhibit Input - Timing Delay time from standby to normal operation tdINH 100 s A IDOL = -2 mA VCS = VCC 0V < VDO < VVCC 7 7 7 VDOL VDOH IDO VVCC -0.7V -15 +15 0.4 V V A A A A
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Delay time between rising edge of the input signal at pin CS after data transmission and switch on output stages to 90% of final level. Device not in standby for t > 1 ms
10
ATA6827 [Preliminary]
4912C-AUTO-10/06
ATA6827 [Preliminary]
9. Serial Interface - Timing
No. 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 Parameters Test Conditions Pin 7 7 7 7 7 3 3 3 5 5 5 5 5 4 4 Timing Chart No.(1) 1 2 10 4 8 9 5 6 7 3 11 12 Symbol tENDO tDISDO tDOf tDOr tDOVal tCSSethl tCSSetlh tCSh tCLKh tCLKl tCLKp tCLKSethl tCLKSetlh tDIset tDIHold 225 225 500 225 225 500 225 225 40 40 Min. Typ. Max. 200 200 100 100 200 Unit ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Type* D D D D D D D D D D D D D D D DO enable after CS CDO = 100 pF falling edge DO disable after CS CDO = 100 pF rising edge DO fall time DO rise time DO valid time CS setup time CS setup time CS high time CLK high time CDO = 100 pF CDO = 100 pF CDO = 100 pF
8.10 CLK low time 8.11 CLK period time 8.12 CLK setup time 8.13 CLK setup time 8.14 DI setup time 8.15 DI hold time
*) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Serial Interface Timing with Chart Numbers
11
4912C-AUTO-10/06
Figure 9-1.
Serial Interface Timing with Chart Numbers
1 2
CS
DO
9
CS
4 7
CLK
5 3 6 8
DI
11
CLK
10
12
DO
Inputs DI, CLK, CS: High level = 0.7 x VCC, low level = 0.3 x VCC Output DO: High level = 0.8 x VCC, low level = 0.2 x VCC
12
ATA6827 [Preliminary]
4912C-AUTO-10/06
ATA6827 [Preliminary]
10. Application Circuit
Figure 10-1. Application Circuit
VCC
U5021M Watchdog
Enable
n. u. n. u.
VS O S C n. u. n. u. n. u. n. u. n. u. H n. S u. 3 L S 3 H S 2 L S 2 H S 1 L S 1 S R R 10 11 Serial interface Charge pump L S 1 T P VS VS BYT41D VBatt Input register Ouput register 13V
Reset
Trigger
+
DI 4 CLK 5
P S F
O P L
S C D
n. u.
n. u.
n. u.
n. u.
n. u.
n. H u. S 3
L S 3
H S 2
L S 2
H S 1
CS 3
Microcontroller
INH 8 DO 7
Fault detector
Fault detector
Fault detector
UV protection 9 Control logic VCC Power on reset 14 GND
VCC VCC 5V
+
Fault detector
Fault detector
Fault detector
17 GND Thermal protection 18 GND 6 GND OUT1
VCC 2 OUT3 12 OUT2 15
M
M
11. Application Notes
It is strongly recommended to connect the blocking capacitors at VCC and VS as close as possible to the power supply and GND pins. Recommended value for capacitors at VS: Electrolytic capacitor C > 22 F in parallel with a ceramic capacitor C = 100 nF. The value for electrolytic capacitor depends on external loads, conducted interferences and reverse conducting current IOut1,2,3 (see Section 4. "Absolute Maximum Ratings" on page 7). Recommended value for capacitors at VCC: Electrolytic capacitor C > 10 F in parallel with a ceramic capacitor C = 100 nF. To reduce thermal resistance it is recommended to place cooling areas on the PCB as close as possible to the GND pins and to the die pad.
13
4912C-AUTO-10/06
12. Ordering Information
Extended Type Number ATA6827-PIQW Package QFN18, 4 mm x 4 mm Remarks Taped and reeled, Pb-free
13. Package Information
Package: VQFN_4 x 4_18L Exposed pad 2.5 x 3.125 Dimensions in mm Not indicated tolerances 0.05 Top 18 Pin 1 identification 3.1250.15 1 12 13 Z
Bottom 2.5 0.5 nom. 18 1 2.5 7 6 2.60.15
technical drawings according to DIN specifications
4912C-AUTO-10/06
6
4
0.2 0.90.1
Z 10:1
Drawing-No.: 6.543-5133.01-4 Issue: preliminary copy; 06.10.06
0.230.07
14
ATA6827 [Preliminary]
0.450.1
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4912C-AUTO-10/06


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