MAX1601 Maxim, MAX1601 Datasheet
MAX1601
Manufacturer Part Number
MAX1601
Description
Dual-Channel CardBus and PCMCIA Power Switches with SMBus Serial Interface
Manufacturer
Maxim
Datasheet
1.MAX1601.pdf
(16 pages)
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The MAX1601/MAX1604 DC power-switching ICs con-
tain a network of low-resistance MOSFET switches that
deliver selectable VCC and VPP voltages to two
CardBus or PC Card host sockets. Key features include
ultra-low-resistance switches, small packaging, soft-
switching action, and compliance with PCMCIA specifi-
cations for 3V/5V switching. 3.3V-only power switching
for fast, 32-bit CardBus applications is supported in two
ways: stiff, low-resistance 3.3V switches allow high 3.3V
load currents (up to 1A); and completely independent
internal charge pumps let the 3.3V switch operate nor-
mally, even if the +5V and +12V supplies are discon-
nected or turned off to conserve power. The internal
charge pumps are regulating types that draw reduced
input current when the VCC switches are static. Also,
power consumption is automatically reduced to 10µA
max when the switches are programmed to high-Z or
GND states over the serial interface, unlike other solu-
tions that may require a separate shutdown-control
input.
Other key features include guaranteed specifications for
output current limit level, and guaranteed specifications
for output rise/fall times (in compliance with PCMCIA
specifications). Reliability is enhanced by thermal-over-
load protection, accurate current limiting, an overcur-
rent-fault flag output, undervoltage lockout, and extra
ESD protection at the VCC/VPP outputs. The SMBus ser-
ial interface is flexible, and can tolerate logic input levels
in excess of the positive supply rail.
The MAX1604 and MAX1601 are identical, except
for the MAX1604’s VY switch, which has roughly three-
times the on-resistance (typically 140m Ω).The
MAX1601/MAX1604 fit two complete CardBus/PCMCIA
switches into a space-saving, narrow (0.2in. or 5mm
wide) SSOP package.
________________________Applications
19-1085; Rev 1; 10/96
________________General Description
Pin Configuration appears on last page.
SMBus is a trademark of Intel Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Desktop Computers
Notebook Computers
Docking Stations
Handy-Terminals
Power Switches with SMBus™ Serial Interface
________________________________________________________________ Maxim Integrated Products
Data Loggers
Digital Cameras
Printers
PCMCIA Read/Write Drives
Dual-Channel CardBus and PCMCIA
____________________________Features
_______________Ordering Information
__________Simplified Block Diagram
MAX1601EAI
MAX1604EAI
Supports Two CardBus Sockets
1A, 0.08Ω Max VY VCC Switch (MAX1601 only)
1A, 0.14Ω Max VX VCC Switch
Soft Switching for Low Inrush Surge Current
Overcurrent Protection
Overcurrent/Thermal-Fault Flag Output
Thermal Shutdown at T
Independent Internal Charge Pumps
Break-Before-Make Switching Action
10µA Max Standby Supply Current
5V and 12V Not Required for Low-R
Switching
Complies with PCMCIA 3V/5V Switching
Specifications
Super-Small, 28-Pin SSOP Package
(0.2in. or 5mm wide)
System Management Bus (SMBus) Serial
Interface
SMBDATA
SMBSUS
PART
SMBCLK
12IN
12IN
GND
VY
VY
VX
VX
VL
VY
VX
ADDRESS
DECODE
SELECT
LOGIC
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
VDD
MAX1601/MAX1604
j
= +150°C
OVERCURRENT
SHUTDOWN
THERMAL
AND
28 SSOP
28 SSOP
PIN-PACKAGE
DS(ON)
VPPA
VCCA
VCCA
VCCA
SMBALERT
ADR
VPPB
VCCB
VCCB
VCCB
3.3V
1
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