Rainbow-electronics ATA6670 User Manual

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Features
Operating Range from 5V to 27V
Baud Rate up to 20Kbaud
LIN Physical Layer According to LIN Specification 2.0, 2.1 and SAEJ2602-2
Fully Compatible with 3.3V and 5V Devices
TXD Dominant Timeout Timer
Normal and Sleep Mode
Wake-up Capability via LIN Bus (90µs Dominant)
Very Low Standby Current During Sleep Mode (10µA)
Bus Pin is Overtemperature and Short-circuit Protected Versus GND and Battery
LIN Input Current < 2µA if VBAT Is Disconnected
Overtemperature Protection
High EMC Level
Interference and Damage Protection According to ISO/CD 7637
Fulfills the OEM Hardware Requirements for LIN in Automotive Applications Rev. 1.1
Transceiver 2: Additional INH High Side Switch Output and High Voltage WAKE Input
1. Description
The Atmel
®
ATA6670 is a fully integrated Dual-LIN transceiver complying with the LIN
specification 2.0, 2.1, and SAEJ2602-2. There are two completely independent and
separated LIN transceivers integrated in one package (only the GND pins GND1 and
GND2 are internally connected). Each of them interfaces with the LIN protocol handler
and the physical layer.
The two LIN transceivers are nearly identical, the only difference is an additional wake
input and an INH output at transceiver 2.
The device is designed to handle the low-speed data communication in vehicles, for
example, in convenience electronics. Improved slope control at the LIN bus ensures
secure data communication of up to 20Kbaud with an RC oscillator for protocol han-
dling. Sleep mode guarantees minimal current consumption for each transceiver even
in the case of a floating bus line or a short-circuit on the LIN bus to GND. The Atmel
ATA6670 features advanced EMI and ESD performance.
Dual LIN
Transceiver
Atmel ATA6670
Preliminary
9204C–AUTO–09/11
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Summary of Contents

Page 1 - Preliminary

Features• Operating Range from 5V to 27V• Baud Rate up to 20Kbaud• LIN Physical Layer According to LIN Specification 2.0, 2.1 and SAEJ2602-2• Fully Co

Page 2

109204C–AUTO–09/11Atmel ATA6670 [Preliminary] 3.14 Wake- up Source Recognition (Only available at Transceiver 2) Transceiver 2 can distinguish between

Page 3

119204C–AUTO–09/11Atmel ATA6670 [Preliminary]4. Absolute Maximum RatingsStresses beyond those listed under “Absolute Maximum Ratings” may cause perman

Page 4

129204C–AUTO–09/11Atmel ATA6670 [Preliminary] 6. Electrical Characteristics5V < VS < 27V, Tj = –40°C to +150°C; the values below are valid for e

Page 5

139204C–AUTO–09/11Atmel ATA6670 [Preliminary]5 INH 2 Output Pin (Only Available at Transceiver 2)5.1 High-level voltageNormal or fail-safe modeIINH2 =

Page 6

149204C–AUTO–09/11Atmel ATA6670 [Preliminary] 7.12Leakage current at loss of battery, node has to sustain the current that can flow under this conditi

Page 7

159204C–AUTO–09/11Atmel ATA6670 [Preliminary]10LIN Bus Driver AC Parameter with Different Bus LoadsLoad 1 (small): 1nF, 1kΩ; Load 2 (large): 10nF, 500

Page 8

169204C–AUTO–09/11Atmel ATA6670 [Preliminary] Figure 6-1. Definition of Bus Timing Parameter TXD(Input to transmitting node)VS(Transceiver supplyof tr

Page 9

179204C–AUTO–09/11Atmel ATA6670 [Preliminary]Figure 6-2. Typical Application Circuit Figure 6-3. Application with Minimum External Devices: INH2 Outpu

Page 10 - Atmel ATA6670 [Preliminary]

189204C–AUTO–09/11Atmel ATA6670 [Preliminary] 8. Package InformationFigure 8-1. DFN14 7. Ordering InformationExtended Type Number Package RemarksATA66

Page 11

199204C–AUTO–09/11Atmel ATA6670 [Preliminary]9. Revision HistoryPlease note that the following page numbers referred to in this section refer to the s

Page 12

29204C–AUTO–09/11Atmel ATA6670 [Preliminary] Figure 1-1. Block Diagram Receiver+-Wake up bustimerSlew rate controlControl unitFilterShort circuitand o

Page 13

Atmel Corporation2325 Orchard ParkwaySan Jose, CA 95131USATel: (+1)(408) 441-0311Fax: (+1)(408) 487-2600Atmel Asia LimitedUnit 01-5 & 16, 19/FBEA

Page 14

39204C–AUTO–09/11Atmel ATA6670 [Preliminary]2. Pin ConfigurationFigure 2-1. Pinning DFN14 RXD1EN1TXD1RXD2EN2WAKE2TXD2VS1LIN1GND1INH2VS2AtmelATA6670LIN

Page 15

49204C–AUTO–09/11Atmel ATA6670 [Preliminary] 3. Functional DescriptionThe functions described in the following text apply to each LIN transceiver. The

Page 16

59204C–AUTO–09/11Atmel ATA6670 [Preliminary]3.7 Output Pin (RXD) This pin reports the state of the LIN bus to the microcontroller. LIN high (recessive

Page 17

69204C–AUTO–09/11Atmel ATA6670 [Preliminary] 3.11 Operation Modes1. Normal modeThis is the normal transmitting and receiving mode. All features are av

Page 18

79204C–AUTO–09/11Atmel ATA6670 [Preliminary]3.12 Remote Wake-up via Dominant Bus StateA voltage lower than the LIN pre-wake detection VLINL at pin LIN

Page 19

89204C–AUTO–09/11Atmel ATA6670 [Preliminary] Figure 3-3. Floating LIN Bus During Sleep Mode If the Atmel® ATA6670 is in sleep mode and the voltage lev

Page 20

99204C–AUTO–09/11Atmel ATA6670 [Preliminary]3.13 Local WAKE-up via Pin WAKE2 (Only Available at Transceiver 2) A falling edge at pin WAKE2 followed by

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