CAN TRANSCEIVER ILA82C251 TECHNICAL DATA

Transcription

1 TECHNICAL DATA CAN TRANSCEIER ILA82C251 The ILA82C251 is the interface between the CAN protocol controller and the physical bus. The device provides differential transmit capability to the bus and differential receive capability to the CAN controller. The IC is intended for automotive electronic applications SOP - 8 Device ORDERING INFORMATION Operating Temperature Range Package ILA82C251D T j = -40 to 125 C SOP-8 Tube Shipping Fig 1 External view of packaged IC ILA82C251DT T j = -40 to 125 C SOP-8 Tape & Reel FEATURES Fully compatible with the ISO standard Thermally protected Short-circuit proof Three mode operation An unpowered node does not disturb the bus lines At least 110 nodes can be connected High speed of data transfer (up to 1 Mbit/s) High immunity against electromagnetic interference. Permissible value of electrostatic potential is The IC is realized in SOP - 8 package (MS-012AA) TXD R S GND CANH CC CANL RXD ref Fig. 2 Pin layout 1

2 Table 1 Pin description Pin number number Pad Description TXD Transmit data input (transmitter) GND Ground CC Supply voltage RXD Receive data output (receiver) ref Reference voltage output CANL LOW-level CAN voltage input/output CANH HIGH-level CAN voltage input/output R S Mode set input Not bonded ILA82C251 CC TXD 01 Input signal block Protection block 03 Driver T1 R S RXD Switch mode block Receiver D CAN HIGH CANL D2 ref 05 Reference voltage T2 02 GND D1, D2 diodes; T1, T2 - transistors Fig. 3 Block diagram 2

3 Table 2 Absolute maximum ratings Parameter Target Min Max CC Supply voltage -0,3 7,0 n 01, 04, 05, 08 pin voltage -0,3 CC + 0,3 tr 06, 07 pin transient voltage T stg Storage temperature o C T j Junction temperature o C * Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Unit Table 3 Recommended operating condition Parameter Min Target Max Unit CC Supply voltage 4,5 5,5 CAN Input/output high and low level voltage of CAN - signal 3

4 Table 4 Electric parameters at -40 T amb +125 C Parameter Measurement mode Target Min Max Unit Supply I 3 Supply current Dominant; - 78 ma 1 = 1,0, CC 5,1 Dominant; = 1,0, CC 5,25 Dominant; = 1,0, CC 5,5 Recessive; = 4,0, R 8 = 47 k Standby mode 1) - 0,315 Standby mode 2) - 0,275 Transmitter IH High-level input voltage Output recessive 0,7 CC CC +0,3 IL Low-level input voltage Output dominant -0,3 0,3 CC I IH High-level input current 4,5 CC 5,5 1 = 4, A I IL 4,5 Low-level input current CC 5, A 1 = 1,0 6,7 4,5 Recessive bus voltage CC 5,5 2,0 3,0 1 = 4,0, no load I LO 4, 5 CC 5,5-2,0 2,0 ma Off-state output leakage 6, 7 ) 7,0-2, 0 ( current 4, 5 CC 5, , 0 ( 6, 7 ) 36 7 CANH output voltage 4,75 СС 5,5 3,0 4,5 1 = 1,0 1 = 1,0 4,5 СС 4,75 2,75 4,5 6 4,5 CANL output voltage CC 5,5 0,5 2,0 1 = 1,0 4

5 Table 4 continued Parameter Measurement mode Target Min Max Unit 6,7 4,5 difference between CC 5,5 1,5 3,0 output 1 = 1,0 voltage at pins 6 and 7 1 = 1,0, R L = 45 1,5-1 = 4,0, no load -0,5 0,05 CANH short-circuit 4,5 CC 5,5 ma I SC7 current 7 = -5, CANL signal shortcircuit 4,5 CC 5,5 ma I SC6 current 6 = 36 3) Receiver (pins 06, 07 are externally controlled, 4 = 4,0, -2,0 ( 6, 7 ) 7,0, unless otherwise specified) DIFF(R) Differential input voltage (recessive mode) DIFF(D) OH OL R I R DIFF Differential input voltage (dominant mode) High-level output voltage (pin 4) Low-level output voltage (pin 4) CANL and CANH input resistance l Differential input resistance 4) 4,5 CC 5,5-7, 0 ( 6, 7 ) 12 4) Reference voltage REF Reference voltage 4,5 CC 5,5 8 = 1,0, I 5 50 мка -1,0 0,5-1,0 0,4-0,9 5,0 4,5 CC 5,5 1,0 5,0-7,0 ( 6, 7 ) 12 5) 0,97 5,0 4,5 CC 5,1 5) 0,91 5,0 4,5 CC 5,5 I 4 = -100 A 0,8 CC CC 4,5 CC 5,5 0 0,2 CC I 4 = 1,0 ma 4,5 CC 5,5 0 1,5 I 4 = 10 ma 4,5 CC 5,5 5,0 25 k 4,5 CC 5, k 4,5 CC 5,5 8 = 4,0, I 5 5,0 A 0,45 CC 0,55 CC 0,4 CC 0,6 CC 5

6 Table 4 continued t bit t ontxd t offtxd t onrxd t offrxd t WAKE t drxdl stb I slope slope Parameter Measurement mode Target Min Max Unit Timing parameters (R L = 60, C L = 100 pf, unless otherwise specified) One bit transmitting 4,5 CC 5,5-1,0 s minimum time R 8 = 0 Input data transfer to 4,5 CC 5,5-50 ns active bus delay R 8 = 0 Input data transfer to 4,5 CC 5,5-80 ns inactive bus delay R 8 = 0 Input data transfer to 4,5 CC 5,5-120 ns active receiver delay R 8 = 0 4,5 CC 5,5-550 R 8 = 47 k Input data transfer to 4,5 CC 5,5-190 ns inactive receiver delay R 8 = 0 4,5 CC 5,5-400 R 8 = 47 k Wake-up time from 4, 5 CC 5,5-20 s standby mode (via 08 pin) Bus input data transfer 4,5 CC 5,5-3,0 s delay to low on output 8 = 4,0 of received data Standby mode and low RFI mode Input voltage for 4,5 CC 5,5 0,75 CC - standby mode Input current for low 4,5 CC 5, A RFI mode Input voltage for low 4,5 CC 5,5 0,4 CC 0,6 CC RFI mode 1) I 1 = I 4 = I 5 = 0 ma, 8 = CC 2) I 1 = I 4 = I 5 = 0 ma, 8 = CC, T amb 90 o C. 3) TXD is LOW, Short-circuit protection provided for slew rate up to 5/us for oltage above +20 4) For the receiver in all modes. 5) Standby mode 6

7 Table 5 Typical values of electric parameters Parameter Measurement mode Typical value Unit diff(hys) Differential hysteresis voltage CC from 4,5 to 5,5 150 m SR CANH, CANL slew rate CC from 4,5 to 5,5 ; 7,0 / s R 8 = 47 k I SC7 High level CAN short circuit current CC from 4,5 to 5,5 ; 7 = ma FUNCTIONAL DESCRIPTION The INA82C251 provides differential transmit capability to the bus and differential receive capability to the CAN controller. Data transfer rate is up to 1 Mbit/s. Output stage has good load capacity. It guarantees 2 peak-to-peak output voltage for 60 load. ILA82C251D has thermal and short circuit protection, high immunity to EMI and is fully compatible with the ISO standard. The IC provides three operation modes: high-speed, reduced RFI mode, standby mode. The design of ILA82C251D permits possibility of adjustment of rise and fall slope of output stages (transistors). Pin R S is used to select one of three modes of operation: high-speed, reduced RFI or standby. High level applied to this pin switches the IC to standby mode, low level to high-speed mode. The high-speed mode is selected by connecting pin R S to ground.to reduce RFI, connect pin R S by resistor Rext to ground. The rise and fall slope of output stages (transistors) can be regulated with Rext resistance. To select high-speed dominant mode a low level voltage (~ 1 ) is applied to TXD pin and R S is connected to ground, CANH and CANL pins are connected by 60 resistor. Guaranteed peak-to-peak output voltage (high and low level) will be 1,5 for all operating supply voltage range To select recessive mode a high level voltage (~ 4 ) is applied to TXD pin and R S is connected to ground. In recessive mode bus output voltage 6,7 is about (~ 2.5 ). High level (~ 4) applied to pin R S switches IC to standby mode (with low power consumption); in this mode consumption current doesn`t exceed 270 A. In this mode transmitter is turn off and consumption current of receiver and all circuit is significantly decreased. Reference voltage value REF per 05 output is half of supply voltage. 7

8 Table 6 - Truth table of the transceiver Supply voltage range, CC, TXD pin CANH pin CANL pin Bus state ILA82C251 4,5 5,5 L H L Dominant L RXD output 4,5 5,5 H Floating Floating Recessive H * 4,5 5,5 X Floating, if Rs 0,75 CC Floating, if Rs 0,75 CC Floating H * 0 5,5 Floating Floating Floating Floating X Notes 1 H high level voltage; L low level voltage; X б don t care (H or L). 2 Floating state half of sum of output levels on pins 06 and 07 ( O(CANL) + O(CANH) / 2). * If another bus node is transmitting a dominant bit, then RXD shall be low Table 7 Transceiver mode table R S pin state Mode R S pin resulting voltage or current Rs 0,75 CC Standby - I Rs 10 A 10 A -I Rs 200 A Slope control 0,4 CC Rs 0,6 CC (Reduced RFI) Rs 0,3 CC High speed - I Rs 500 A 8

9 Table 8 - Truth table of the receiver Input differential voltage DIFF *, В DIFF 0,9 0,5 DIFF 0,9 DIFF 0,5 Absent RXD pin * Input difference voltage DIFF, is determined by formula DIFF = 7 6, ( 1 ) 7 CANH output voltage, ; 6 - CANL output voltage, ** Not determined (hysteresis zone) L ** H H U Pin 01 (TXD) U CC 0 U O(D) Pins 06, 07 (CANL, CAN HIGH) 0,9 0,5 U7,6 U O( R) Pin 04 (RXD) U CC 0,3U CC 0,7U CC 0 t ontxd t offtxd t s 0 t offrxd t onrxd Fig. 4 t ontxd, t onrxd, t offtxd, t offrxd parameters measurement timing diagram 9

10 Pin 04 (RXD) U High level Low level Hysteresis 0,5 0,9 U diff Fig. 5 diff(hys) parameter measurement timing diagram U Pin 08 (R S ) U CC 0 Pin 04 (RXD) 0 t WAKE t s Fig. 6 t WAKE parameter measurement timing diagram 10

11 U 1,5 Pins 07,06 (CAN HIGH, CANL) 0 Pin 04 (RXD) 0 t s t drxdl t drxdl 15 s Fig. 7 t drxdl parameter measurement timing diagram 11

12 P8 C592 MCU CTX0 CTX0 CTX1 PX, Y R ext + 5 TXD RXD ref R S ILA82C251D CC GND C1 100nF CAN HIGH CANL R1 120 CAN bus line R2 120 Fig. 8 Application diagramm 12

13 E 1 H ILA82C251 Package Dimensions D hx45 e C A 1 Mounting plane L c 0,25 (0,010) b M C D E1 H b e A A1 c L h mm min max Fig. 9 MS-012AA package dimensions 13