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PDF 33996 Data sheet ( Hoja de datos )
| Número de pieza | 33996 | |
| Descripción | 16-Output Switch | |
| Fabricantes | Freescale Semiconductor | |
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Freescale Semiconductor
Advance Information
Document Number: MC33996
Rev. 6.0, 6/2007
16-Output Switch with SPI
Control
33996
The 33996 is a 16-output low-side switch with a 24-bit serial input
control. It is designed for a variety of applications including inductive,
incandescent, and LED loads. The Serial Peripheral Interface (SPI)
provides both input control and diagnostic readout. A Pulse Width
Modulation (PWM) control input is provided for pulse width
modulation of multiple outputs at the same duty cycle. A dedicated
reset input provides the ability to clear all internal registers and turn
all outputs off.
The 33996 directly interfaces with micro controllers and is
compatible with both 3.3 V and 5.0 V CMOS logic levels. The 33996,
in effect, serves as a bus expander and buffer with fault management
features that reduce the MCU’s fault management burden.
Features
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Designed to Operate 5.0 V < VPWR < 27 V
24-Bit SPI for Control and Fault Reporting, 3.3 V/5.0 V Compatible
Outputs Are Current Limited (0.9 A to 2.5 A) to Drive Incandescent
Lamps
Output Voltage Clamp of +50 V During Inductive Switching
On/Off Control of Open Load Detect Current (LED Application)
VPWR Standby Current < 10 µA
RDS(ON) of 0.55 Ω at 25°C Typical
Independent Overtemperature Protection
Output Selectable for PWM Control
Output ON Short-to-VBAT and OFF Short-to-Ground/Open
Detection
Pb-Free Packaging Designated by Suffix Code EK
LOW SIDE SWITCH
EK SUFFIX (PB-FREE)
98ARL10543D
32-PIN SOICW EXPOSED PAD
ORDERING INFORMATION
Device
MC33996EK/R2
MCZ33996EK/R2
Temperature
Range (TA)
Package
-40°C to 125°C 32 SOICW-EP
Vdd
3.3 V/5.0 V
33996
VPWR
VBAT
VDD
MCU
SCLK
CS
MISO
MOSI
PWM
RST
SOPWR
VPWR
SCLK
CS
SI
SO
PWM
RST
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
OUT15
GND
Solenoid/Relay
LED
/8 Lamp
Figure 1. 33996 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.
1 page  
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. STATIC ELECTRICAL CHARACTERISTICS
Characteristics noted under conditions 3.1 V ≤ SOPWR ≤ 5.5 V, 5.0 V ≤ VPWR ≤ 18 V, -40°C ≤ TA ≤ 125°C unless otherwise
noted. Where applicable, typical values noted reflect the parameter ‘s approximate value with VPWR = 13 V, TA = 25°C.
Characteristic
Symbol
Min
Typ
Max Unit
POWER SUPPLY (VPWR)
Supply Voltage Range
Fully Operational
VPWR (FO)
V
5.0 – 27
Supply Current
All Outputs ON, IOUT = 0.3 A
IPWR (ON)
–
mA
4.0 8.0
Sleep State Supply Current at RST ≤ 0.8 and/or
SOPWR ≤ 1.5 V
IPWR (SS)
Overvoltage Shutdown
VOV
Overvoltage Shutdown Hysteresis
VOV (HYS)
VPWR Undervoltage Shutdown
VPWR (UV)
SPI Interface Logic Supply Voltage
SOPWR
SPI Interface Logic Supply Current (RST Pin High)
ISOPWR(RSTH)
SPI Interface Logic Supply Current (RST Pin Low)
ISOPWR(RSTL)
SPI Interface Logic Supply Undervoltage Lockout Threshold SOPWR(UNVOL)
POWER OUTPUT (VPWR)
_
27.5
0.6
–
3.1
100
-10
1.5
1.0
31.5
1.4
3.2
–
–
–
2.5
10 µA
35 V
2.3 V
4.0 V
5.5 V
500 µA
10 µA
3.0 V
Drain-to-Source ON Resistance (IOUT = 0.35 A, VPWR =
13 V)
TJ = 125°C
TJ = 25°C
TJ = -40°C
RDS(ON)
–
–
–
Ω
0.75 1.1
0.55 –
0.45 –
Output Self-Limiting Current
Outputs Programmed ON
I OUT (lim)
A
0.9 1.2 2.5
Output Fault Detect Threshold (10)
Outputs Programmed OFF
VOUTth (F)
V
2.5 3.0 3.5
Output Off Open Load Detect Current (11)
Outputs Programmed OFF (VPWR = 5.0 V, 13 V, 18 V)
I OCO
25
µA
50 100
Output Clamp Voltage
IOUT = 20 ≤ mA
VCL V
45 50 55
Output Leakage Current
SOPWR ≤ 1.5 V, VOUT 1-16 = 18.0 V
IOUT(lkg)
µA
-10 2.0 10
Overtemperature Shutdown (Outputs OFF) (12)
Overtemperature Shutdown Hysteresis (12)
TLIM 155 165 180 °C
TLIM (hys)
5.0
10
20 °C
Notes
10. Output Fault Detect Thresholds with outputs programmed OFF. Output Fault Detect Thresholds are the same for output open and
shorts.
11. Output OFF Open Load Detect Current is the current required to flow through the load for the purpose of detecting the existence of an
open load condition when the specific output is commanded to be OFF.
12. This parameter is guaranteed by design; however, it is not production tested.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33996
5
5 Page 
FUNCTIONAL DESCRIPTION
OPERATIONAL MODES
OPERATIONAL MODES
On each SPI communication, a 24-bit command word is
sent to the 33996 and 24-bit fault word is received from the
33996. The Most Significant Bit (MSB) is sent and received
first.
Command Register Definition:
0 = Output Command Off
1 = Output Command On
SO Definition:
0 = No fault
1 = Fault
Table 5. Fault Operation
Overtemperature
Overcurrent
Output “ON’ Open Load Fault
Output “OFF’” Open Load Fault
Device Shutdowns
Overvoltage
Overtemperature
Overcurrent
Serial Output (SO) Pins Reports
Fault reported by Serial Output (SO) pin.
SO pin reports short to battery/supply or overcurrent condition.
Not reported.
SO pin reports output “OFF’” open load condition.
Total device shutdown at VPWR = 27.5 V to 35 V. Resumes normal operation with proper voltage.
Upon recovery all outputs assume previous state or OFF based on the Overvoltage bit in the Global
Shutdown/Retry Control Register.
Only the output experiencing an overtemperature fault shuts down. Output may auto-retry or remain
off according to the control bits in the Global Shutdown/Retry Control Register.
Output will remain in current limit 0.9 A to 2.5 A until thermal limit is reached. When thermal limit is
reached, device will enter overtemperature shutdown. Output will operate as programmed in the
Global Shutdown/Retry Control Register. Fault flag in SO Response word will be set.
MCU INTERFACE DESCRIPTION
In operation the 33996 functions as a 16-output serial
switch serving as a microcontroller (MCU) bus expander and
buffer with fault management and fault reporting features. In
doing so, the device directly relieves the MCU of the fault
management functions.
The 33996 directly interfaces to an MCU and operates at
system clock serial frequencies up to 6.0 MHz using a Serial
Peripheral Interface (SPI) for control and diagnostic readout.
Figure 9 shows the basic SPI configuration between an
MCU and one 33996.
MC68HCXX
Microcontroller
Shift Register
MOSI
MISO
33996
SI
24-Bit Shift Register
SO
Receive
Buffer
Parallel
Ports
SCLK
RST
CS
PWM
To Logic
Analog Integrated Circuit Device Data
Freescale Semiconductor
Figure 9. 33996 SPI Interface with Microcontroller
All inputs are compatible with 3.3 V/5.0 V CMOS logic
levels and incorporate positive logic. An input that is
programmed to a logic low state (< 0.8 V) will have the
corresponding output OFF. Conversely, an input
programmed to a logic high state (> 2.2 V) will have the
33996
11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet 33996.PDF ] | |
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