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PDF ATA6625 Data sheet ( Hoja de datos )
| Número de pieza | ATA6625 | |
| Descripción | (ATA6623 / ATA6625) LIN Bus Transceiver | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ATA6625 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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Features
• SuppwlywwVo.DltaatagSehueept4tUo.c4o0mV
• Operating Voltage VS = 5V to 27V
• Typically 10 µA Supply Current During Sleep Mode
• Typically 57 µA Supply Current in Silent Mode
• Linear Low-drop Voltage Regulator:
– Normal, Fail-safe, and Silent Mode
– ATA6623: VCC = 3.3V ±2%
– ATA6625: VCC = 5.0V ±2%
– Sleep Mode: VCC is Switched Off
• VCC Undervoltage Detection with Reset Open Drain Output NRES (4 ms Reset Time)
• 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
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; VCC voltage on) guarantee minimized current consumption.
LIN Bus
Transceiver
with Integrated
Voltage
Regulator
ATA6623
ATA6625
4957F–AUTO–02/08
1 page  
ATA6623/ATA6625
4. Mode of Operation
www.DataSheet4U.com
Figure 4-1. Mode of Operation
Unpowered Mode
VBatt = 0V
ba
a: VS > 5V
b: VS < 4V
c: Bus wake-up event
d: NRES switches to low
b
d
Fail-safe Mode
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
c+d
b
EN = 1
Normal Mode
VCC: 3.3V/5V/50 mA
with undervoltage
monitoring
Communication: ON
EN = 0
TXD = 1
EN = 1
EN = 0
TXD = 0
Go to silent command
Local wake-up event
Go to sleep command
EN = 1
c
b
Silent Mode
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
Sleep Mode
VCC: switched off
Communication: OFF
4957F–AUTO–02/08
5
5 Page 
ATA6623/ATA6625
6. Voltage Regulator
www.DataSheet4U.com
Figure 6-1. VCC Voltage Regulator: Ramp Up and Undervoltage
VS
12V
5.5V/3.8V
VCC
5V/3.3V
Vthun
NRES
5V/3.3V
tVCC
tReset
tres_f
The voltage regulator needs an external capacitor for compensation and to smooth the distur-
bances from the microcontroller. It is recommended to use an electrolythic capacitor with
C > 10 µF and a ceramic capacitor with C = 100 nF. The values of these capacitors can be var-
ied by the customer, depending on the application.
With this special SO8 package (fused lead frame to pin3) an Rthja of 80 K/W is achieved.
Therefore, it is recommended to connect pin 3 with a wide GND plate on the printed board to get
a good heat sink.
The main power dissipation of the IC is created from the VCC output current IVCC, which is
needed for the application.
Figure 6-2 shows the safe operating area of the ATA6623/ATA6625.
4957F–AUTO–02/08
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet ATA6625.PDF ] | |
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