ATA6620N-TAQY Atmel, ATA6620N-TAQY Datasheet
ATA6620N-TAQY
Specifications of ATA6620N-TAQY
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ATA6620N-TAQY Summary of contents
Page 1
... The combination of voltage regulator and bus transceiver makes it possible to develop simple, but powerful, slave nodes in LIN Bus systems. ATA6620N is designed to handle the low-speed data com- munication in vehicles (for example, in convenience electronics). Improved slope control at the LIN driver ensures secure data communication kBaud with an RC oscillator for the protocol handling ...
Page 2
... LIN bus line input/output 5 RXD Receive data output 6 TXD Transmit data input, active low output 7 NRES Output undervoltage reset, low at reset 8 VCC Output voltage regulator 5V/50 mA ATA6620N 2 Wake-up Bus Timer TXD Slew Rate Control Timer Sleep Mode Control VCC Unit Switched Off ...
Page 3
... CC , NRES switches to low after tres_f (see thun voltage disconnection. The LIN receiver thresholds are compatible with the LIN proto- Batt ATA6620N , the IC starts with the Pre-normal S thun voltage falls below the under- CC Figure 4-7 on page = 0V the NRES stays low, because it CC ...
Page 4
... Pre-normal mode, even low or unconnected (internal pull-down resistor high, the interface is in Normal mode. A falling edge at EN while TXD is still high forces the device to Silent mode. A falling edge at EN while TXD is low forces the device to Sleep mode. ATA6620N 4 > 4 ms, the DOM ...
Page 5
... This is the normal transmitting and receiving mode of the LIN Interface, in accordance with LIN specification 2.0. The V ance of ±2% and a maximum output current undervoltage condition occurs, NRES is switched to low and the ATA6620N changes state to Pre-normal mode. All features are available. 4850I–AUTO–09/09 ...
Page 6
... The Silent mode voltage is sufficient to run an external microcontroller on the ECU, for example in Power Down mode. The undervoltage reset is V occurs, NRES is switched to low and the ATA6620N changes state to Pre-normal mode. A falling edge at pin LIN followed by a dominant bus level maintained for a certain time period (t ) results in a remote wake-up request ...
Page 7
... RXD VCC Node ln silent mode EN NRES If undervoltage switch to pre-normal mode 4850I–AUTO–09/09 VLIN < 0 High High Bus wake-up filtering time t bus Silent mode Regulator Wake-up Time ATA6620N Normal Mode Pre-normal Mode Low Pre-normal mode Normal mode EN High Undervoltage detection active 7 ...
Page 8
... TXD (see With EN high you can switch directly from Silent to Normal mode. In the application where the ATA6620N supplies the microcontroller, the wake-up from Sleep mode is only possible via pin LIN. If the device is switched into Sleep mode, V reset at pin NRES ...
Page 9
... NRES 4.2.3 Wake Up from Sleep/Silent Mode at an Insufficient Falling Edge at Pin LIN If the ATA6620N is in Sleep mode or Silent mode and the voltage at the LIN Bus falls to a value lower than VLINL < V than 0.6 internal NMOS- transistor connected to the pin TXD is switched on and pulls down the pin TXD to Ground ...
Page 10
... NRES If undervoltage switch to pre-normal mode When designing the complete system it has to be considered, that in this case (only in pre-nor- mal mode) the pin TXD of the ATA6620N works as an output. 4.3 Pre-normal Mode At system power-up the device automatically switches to Pre-normal mode. The voltage regula- ...
Page 11
... V thun NRES t t VCC res 5V , switches the output on again. During LIN hys regulator works independently disconnected. Batt ATA6620N Figure 4-7), the voltage at the VS is higher than the V undervoltage threshold capacitor and the load es_f . Due to the power BUS_LIM and the LIN output is switched off. The chip LINoff or GND ...
Page 12
... For programming purposes of the microcontroller it is potentially necessary to supply the VCC output via an external power supply while the VS pin of the system basis chip is disconnected. This behavior is no problem for the system basis chip. ATA6620N 12 shows the safe operating area of the ATA6620N. Save Operating Area versus V ent Ambient Temperatures with R 60.00 50.00 40 ...
Page 13
... Min. V –0 –0.3 I –2 NRES –40 –150 –0.3 –6 –3 –1000 T – – – thja R thja T 150 VCCoff T 150 LINoff T hys ATA6620N Typ. Max. Unit +40 + +60 +100 +6 +1000 +150 +150 +125 145 K/W 80 K/W 160 170 160 170 °C °C ° ...
Page 14
... Low level voltage input 4.2 High level voltage input 4.3 Pull-down resistor V EN 4.4 Low level input current Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATA6620N 14 Pin Symbol VS V > V – 0.5V Batt VS I VSsleep < 14V < ...
Page 15
... VCC V hysthun > 5.5V > 0V VCC I VCCs Min. Typ. Max. 4.5 0.2 0.14 0 4.9 5 5.1 – 250 D 500 D 200 D –50 –200 –130 1.8 2.2 load 4.4 4.8 30 300 4.65 5. 5.1 – 200 D 3.9 4.4 40 –200 –130 ATA6620N Unit Type µ µ µ ...
Page 16
... V BUS_CNT 9.1 threshold (V 9.2 Receiver dominant state V EN 9.3 Receiver recessive state V EN Receiver input 9.4 V hys hysteresis *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATA6620N 16 Pin Symbol = RXD LIN V BUSrec = 7V LIN V _LoSUP = 500 = 18V LIN V _HiSUP ...
Page 17
... V ; Rec(min 0.284 V ; Dom(min 7.0V to 18V 50ms /( bus_rec(max) Bit t SLOPE_fall t SLOPE_rise t s_n ): 20 pF 2.4 k RXD pull-up = max rx_pdr rx_pdf rx_pd = t – rx_pdr rx_pdf rx_sym ATA6620N Min. Typ. Max. Unit V – 0. –27 V – 3. 150 µ µ µ 0.396 0.581 3.5 22.5 µ µs 6 µ ...
Page 18
... Figure 8-1. Definition of Bus Timing Characteristics TXD (Input to transmitting Node) THRec(max) THDom(max) VS (Transceiver supply of transmitting node) THRec(min) THDom(min) RXD (Output of receiving Node1) RXD (Output of receiving Node2) ATA6620N 18 t Bit t Bus_dom(max) LIN Bus Signal t Bus_dom(min) t rx_pdf(1) t rx_pdr( Bit Bit t Bus_rec(min) Thresholds of receiving node 1 ...
Page 19
... Slew Rate Control Time-out Timer Normal Mode Voltage Regulator Sleep 5V/50 mA/2% Control Mode Unit VCC Undervoltage Reset Switched Silent Mode Off Voltage Regulator 5V/50 mA/7% ATA6620N 1 Normal VS and 100 nF Pre-normal Mode LIN 4 Filter 220 pF Short-circuit and Overtemperature Protection VCC 8 NRES 7 10 µ ...
Page 20
... Ordering Information Extended Type Number ATA6620N-TAQY 10. Package Information Package Dimensions in mm 0.4 1.27 Drawing-No.: 6.541-5031.01-4 Issue: 1; 15.08.06 ATA6620N 20 Package Remarks SO8 LIN system basis chip, Pb-free, 4k, taped and reeled 4.9 ±0.1 3. ±0.2 3.7 ±0.1 3.8 ±0.1 6 ±0.2 technical drawings according to DIN specifications 4850I– ...
Page 21
... Section 8 “Electrical Characteristics” numbers 5.2, 5.3 and 6.8 on page 15 changed Put datasheet in a new template ATA6620 in ATA6620N renamed Figure 1-1 “Block Diagram” on page 2 changed Table 2-1 “Pin Description” on page 2 changed Section 4-2 “Modes of Reduced Current Consumption” on page 6 changed Figure 4-3 “ ...
Page 22
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