ata6625-taqy ATMEL Corporation, ata6625-taqy Datasheet

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ata6625-taqy

Manufacturer Part Number
ata6625-taqy
Description
Lin Bus Transceiver With Integrated Vol Tage Regulator
Manufacturer
ATMEL Corporation
Datasheet

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Features
1. Description
ATA6623/ATA6625 is a fully integrated LIN transceiver, designed according to the LIN
specification 2.0, with a low-drop voltage regulator (3.3V/5V/50 mA). The combination
of voltage regulator and bus transceiver makes it possible to develop simple, but pow-
erful, slave nodes in LIN Bus systems. ATA6623/ATA6625 is designed to handle the
low-speed data communication in vehicles (for example, in convenience electronics).
Improved slope control at the LIN driver ensures secure data communication up to
20 kBaud with an RC oscillator for the protocol handling. The bus output is designed
to withstand high voltage. Sleep Mode (voltage regulator switched off) and Silent
Mode (communication off; V
Supply Voltage up to 40V
Operating Voltage V
Typically 10 µA Supply Current During Sleep Mode
Typically 57 µA Supply Current in Silent Mode
Linear Low-drop Voltage Regulator:
V
Voltage Regulator is Short-circuit and Over-temperature Protected
LIN Physical Layer According to LIN Specification Revision 2.0 and SAEJ2602-2
Wake-up Capability via LIN Bus (90 µs Dominant)
TXD Time-out Timer
Bus Pin is Overtemperature and Short-circuit Protected versus GND and Battery
Advanced EMC and ESD Performance
ESD HBM 8 kV at Pins LIN and VS Following STM5.1
Interference and Damage Protection According to ISO/CD7637
Package: SO8
CC
– Normal, Fail-safe, and Silent Mode
– ATA6623: V
– ATA6625: V
– Sleep Mode: V
Undervoltage Detection with Reset Open Drain Output NRES (4 ms Reset Time)
CC
CC
= 3.3V ±2%
= 5.0V ±2%
CC
S
is Switched Off
= 5V to 27V
CC
voltage on) guarantee minimized current consumption.
LIN Bus
Transceiver
with Integrated
Voltage
Regulator
ATA6623
ATA6625
4957F–AUTO–02/08

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ata6625-taqy Summary of contents

Page 1

... The combination of voltage regulator and bus transceiver makes it possible to develop simple, but pow- erful, slave nodes in LIN Bus systems. ATA6623/ATA6625 is designed to handle the low-speed data communication 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

... Ground, heat sink 4 LIN LIN bus line input/output 5 RXD Receive data output 6 TXD Transmit data input 7 NRES Output undervoltage reset, low at reset 8 VCC Output voltage regulator 3.3V/5V/50 mA ATA6623/ATA6625 2 ATA6623/25 Receiver + - Wake-up bus timer Slew rate control TXD Time-out timer Sleep Fail-safe Mode mode Control 3.3V/50 mA/2% ...

Page 3

... V CC (Figure 6-1 on page 11). Even if V voltage disconnection. The LIN receiver thresholds are compatible with the LIN proto- Batt ATA6623/ATA6625 thun = 0V the NRES stays low, because voltage ramps down, NRES stays low until after V Reset ...

Page 4

... Fail-safe 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. ATA6623/ATA6625 4 > 6 ms, the DOM ...

Page 5

... Fail-safe Mode VCC: 3.3V/5V/50 mA with undervoltage monitoring d Communication: OFF silent command TXD = 1 Local wake-up event sleep command TXD = 0 ATA6623/ATA6625 a: V > < Bus wake-up event d: NRES switches to low Silent Mode VCC: 3.3V/5V/50 mA ...

Page 6

... LIN is short-circuited to GND. Only a weak pull-up current (typically 10 µA) between pin LIN and pin VS is present. The Silent Mode can be activated independently from the current level on pin LIN undervoltage condition occurs, NRES is switched to low and the ATA6623/ATA6625 changes its state to Fail-safe Mode. A voltage less than the LIN Pre-wake detection V receiver ...

Page 7

... LIN LIN switches directly to recessive mode LIN Wake-up Waveform Diagram from Silent Mode Bus wake-up filtering time t bus High Silent mode 3.3V/5V/ Undervoltage detection active ATA6623/ATA6625 Silent Mode Mode select window Fail-safe mode Low Fail-safe mode 3.3V/5V/50 mA Normal mode Normal mode EN High 7 ...

Page 8

... EN high can be used to switch directly from Sleep/Silent to Fail-safe Mode still high after VCC ramp up and undervoltage reset time, the IC switches to Normal Mode. Figure 4-4. ATA6623/ATA6625 µA. The V regulator is switched off; NRES and RXD are low. The internal slave ...

Page 9

... LIN communication is switched off. res (V < 4V) during Silent- or Sleep Mode switches the IC into the Fail-safe Batt S Figure 6-1 on page , the IC mode changes from Unpowered Mode to Fail-safe Mode. th Reset ATA6623/ATA6625 Fail-safe Mode Low On state Regulator wake-up time Reset time Microcontroller start-up time delay Figure 6-1 on page 11) ...

Page 10

... Pin TXD provides a pull-up resistor to force the transceiver into Recessive Mode if TXD is disconnected. • If TXD is short-circuited to GND possible to switch to Sleep Mode via ENABLE after tdom > 20 ms. ATA6623/ATA6625 10 , the output limits the output current to I Battery and the LIN output is switched off. ...

Page 11

... The main power dissipation of the IC is created from the V needed for the application. Figure 6-2 4957F–AUTO–02/08 V Voltage Regulator: Ramp Up and Undervoltage CC VS 12V 5.5V/3.8V VCC 5V/3.3V V thun t t VCC Reset NRES 5V/3.3V shows the safe operating area of the ATA6623/ATA6625. ATA6623/ATA6625 t res_f of 80 K/W is achieved. thja output current I , which is CC VCC 11 ...

Page 12

... Figure 6-2. For programming purposes of the microcontroller it is potentially neccessary to supply the V output via an external power supply while the V This behavior is no problem for the system basis chip. ATA6623/ATA6625 12 Power Dissipation: Save Operating Area versus V Voltage V at Different Ambient Temperatures Due ...

Page 13

... –0.3 I NRES –27 –0.3 ±6 ±8 ±3 ±750 T – – thja R thja T 150 VCCoff T 150 LINoff T hys ATA6623/ATA6625 Typ. Max. Unit +40 + +40 +5 +150 °C +150 °C 145 K/W 80 K/W 160 170 °C 160 170 °C 10 °C ...

Page 14

... EN Input Pin 4.1 Low level voltage input 4.2 High level voltage input 4.3 Pull-down resistor V 4.4 Low level input current V *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATA6623/ATA6625 14 Pin VS > V – 0.5V VS LIN S < 14V (T = 25° > V – 0.5V ...

Page 15

... VCC undervoltage Referred to VCC 6.10 threshold VS > 4V Hysteresis of Referred to VCC 6.11 undervoltage threshold VS > 4V Ramp up time VS > 6.12 to VCC = 3.3V I load 7 VCC Voltage Regulator ATA6625 5.5V < VS < 18V 7.1 Output voltage mA) Output voltage 7.2 4V < VS < 5.5V low V S 7.3 Regulator drop voltage VS > 4V, I 7.4 Regulator drop voltage VS > ...

Page 16

... Node has to sustain the current that can flow V 8.11 under this condition. Bus V must remain operational 0V < V under this condition. *) Type means 100% tested 100% correlation tested Characterized on samples Design parameter ATA6623/ATA6625 16 Pin < VCC VCC VCC VCC VCC VCC = 2.2 µF ...

Page 17

... V Rec(max 0.616 V Dom(max 7.0V to 18V µs /( bus_rec(min) Bit = 0.389 V Rec(min 0.251 V Dom(min 7.6V to 18V µs /( bus_rec(max) Bit ATA6623/ATA6625 Symbol Min. Typ. Max. 0.475 0.5 0.525 V BUS_CNT –27 0.4 BUSdom V 0 BUSrec S 0.028 0.175 V 0 BUShys S V ...

Page 18

... Definition of Bus Timing Characteristics TXD (Input to transmitting node) TH Rec(max Dom(max) (Transceiver supply of transmitting node) TH Rec(min) TH Dom(min) RXD (Output of receiving node1) t rx_pdf(1) RXD (Output of receiving node2) ATA6623/ATA6625 18 Pin = 7.0V to 18V RXD = 7.0V to 18V S = max rx_pdr rx_pdf = 7.0V to 18V – t rx_pdr rx_pdf ...

Page 19

... Normal and Fail-safe + - Wake-up bus timer Slew rate control Normal Mode Sleep and mode Silent mode Control VCC 3.3V/50 mA/2% unit switched 5V/50 mA/2% off Undervoltage reset ATA6623/ATA6625 1 VS 100 nF Mode 4 LIN RF filter Short circuit and overtemperature protection 8 VCC NRES 100 nF V BAT + 22 µ ...

Page 20

... Ordering Information Extended Type Number ATA6623-TAPY ATA6625-TAPY ATA6623-TAQY ATA6625-TAQY 10. Package Information Package Dimensions in mm 0.4 1.27 Drawing-No.: 6.541-5031.01-4 Issue: 1; 15.08.06 ATA6623/ATA6625 20 Package Remarks SO8 3.3V LIN system basis chip, Pb-free, 1k, taped and reeled SO8 5V LIN system basis chip, Pb-free, 1k, taped and reeled SO8 3.3V LIN system basis chip, Pb-free, 4k, taped and reeled ...

Page 21

... Revision No. 4957F-AUTO-02/08 4957E-AUTO-10/07 4957D-AUTO-07/07 4957C-AUTO-02/07 4957F–AUTO–02/08 ATA6623/ATA6625 History “Pre-normal Mode” in “Fail-safe Mode” changed Section 7 “Absolute Maximum Ratings” on page 13 changed Section 8 “Electrical Characteristics” numbers 10.5 to 10.10 on pages changed Section 9 “Ordering Information” on page 20 changed ...

Page 22

... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © 2008 Atmel Corporation. All rights reserved. Atmel Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. International Atmel Asia ...

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