PCZ33742 Datasheet PDF - Freescale Semiconductor
| Part Number | PCZ33742 | |
| Description | System Basis Chip | |
| Manufacturers | Freescale Semiconductor | |
| Logo |  |
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www.DFaretaeSshceeatl4eUS.ceommiconductor
Advance Information
Document Number: MC33742
Rev. 10.0, 5/2007
System Basis Chip (SBC) with
Enhanced High-Speed CAN
Transceiver
33742
33742S
The 33742 and the 33742S are SPI-controlled System Basis Chips
(SBCs) combining many frequently used functions along with a CAN 2.0-
compliant transceiver, used in many automotive electronic control units
(ECUs). The 33742 SBC has a fully protected fixed 5.0 V low dropout
internal regulator with current limiting, overtemperature pre-warning, and
reset. A second 5.0 V regulator can be implemented using external pass
PNP bipolar junction pass transistor driven by the SBC’s external V2
sense input and V2 output drive pins.
The SBC has four main operating modes: Normal, Standby, Stop, and
Sleep mode. Additionally there is an internally switched high-side power
supply output, four wake-up inputs pins, a programmable window
watchdog, interrupt, reset, and a SPI module for communication and
control. The high-speed CAN A and B transceiver is available for inter-
module communication.
SYSTEM BASIS CHIP
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42345B
28-PIN SOICW
EP SUFFIX
(PB-FREE)
98ARH99048A
48-PIN QFN
Features
• 1.0 Mbps CAN Transceiver Bus Interface with Bus Diagnostic
Capability
• SPI Control at Frequencies up to 4.0 Mhz
• 5.0 V Low Dropout Voltage Regulator with Current Limiting,
Overtemperature Pre-Warning, and Output Monitoring and Reset
• A Second 5.0 V Regulator Capability using an External Series Pass
Transistor
• Normal, Standby, Stop, and Sleep Modes of Operation with Low Sleep
and Stop Mode Current
• A High-Side (HS) Switch Output Driver for Controlling External
Circuitry.
• Pb-Free Packaging Designated by Suffix Code EG and EP
ORDERING INFORMATION
Device
MC33742DW/R2
Temperature
Range (TA)
MCZ33742EG/R2
MC33742SDW/R2 -40°C to 125°C
MCZ33742SEG/R2
Package
28 SOICW
PCZ33742EP/R2
48 QFN
VPWR
33742
5.0 V
VDD VSUP
V2
MCU
RST V2CTRL
V2
VPWR
CS
SCLK
MOSI
MISO
CS L0
SPI
SCLK
MOSI
L1
L2
MISO
L3
WDOG
INT HS
Safe Circuitry
ECU Local
Supply
TXD CANH
RXD CANL
Twisted CAN Bus
Pair
GND GND
Figure 1. 33742 Simplified Application Diagram
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2007. All rights reserved.
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PIN CONNECTIONS
NC 1
SCLK 2
MISO 3
MOSI 4
CS 5
WDOG 6
RXD 7
TXD 8
VDD 9
RST 10
INT 11
NC 12
36 NC
35 CANL
34 CANH
33 L3
32 L2
31 L1
30 L0
29 HS
28 VSUP
27 V2 CTRL
26 V2
25 NC
Figure 4. 33742 48-Pin Connections
Table 3. 33742 48-Pin Definitions
A functional description of each pin can be found in the Functional Pin description section beginning on page 22.
Pin Pin Name
Formal Name
Definition
1, 12-16,
21-25,
36-40,
45-48
2
3
NC
SCLK
MISO
No Connect
No connection.
Serial Data Clock
Master In Slave Out
Clock input pin for the Serial Peripheral Interface (SPI).
SPI data sent to the MCU by the 33742. When CS is HIGH, the pin is in the high-
impedance state.
4
MOSI
Master Out Slave In
SPI data received by the 33742.
5
6
7
8
9
10
11
17-20
41-44
CS
WDOG
RXD
TXD
VDD
RST
INT
GND
Chip Select
(Active LOW)
Watchdog Output
(Active LOW)
Receive Data
Transmit Data
Voltage Digital Drain
Reset Output
(Active LOW)
Interrupt Output
(Active LOW)
Ground
The CS input pin is used with the SPI bus to select the 33742. When the CS is asserted
LOW, the 33742 is the selected device of the SPI bus.
The WDOG output pin is asserted LOW if the software watchdog is not correctly
triggered.
CAN bus receive data output pin.
CAN bus transmit data input pin.
5.0 V regulator output pin. Supply pin for the MCU.
This is the device reset output pin whose main function is to reset the MCU. This pin has
an internal pullup current source to VDD.
This output is asserted LOW when an enabled interrupt condition occurs. The output is
a push-pull structure.
These device ground pins are internally connected to the package lead frame to provide
a 33742-to-PCB thermal path.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33742
5
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| Information | Total 30 Pages | |
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