CM2500-05

CM2500-05 CALMIRCO | Alldatasheet

Document overview

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Technical content

Features

Functionally equivalent to a five-diode pair network Up to 60% space saving vs. discrete solution Flexibility in design with "separate" outputs 100kΩ pull-up resistors on outputs Voltage drop of less than 10mV under light loads 16-lead QFN package - 3mm x 3mm, 0.5mm pitch Lead-free version available

Applications

Enables more keys from current keyboard control- ler without extra I/O from chipset Keypad switches in mobile electronics Roller pad or joystick in mobile electronic products Wireless Handsets MP3 Players Digital Cameras Product Description The CM2500-05 is a CMOS multiplexer for keypad switches. The device is functionally equivalent to a five-diode pair network. However, each channel in this network has virtually no voltage drop from input to out- put under light load. All inputs and outputs have an internal pull up to VCC. This device is particularly well suited for portable elec- tronics (e.g. mobile handsets, PDAs, notebook com- puters) because of its small package format. This product is ideal for converting the logic of keypad switches where each switch pulls two sense lines low. The keypad multiplexer channels are set up in series on the keypad sense lines such that it will interface directly to the CPU chipset. The CM2500-05 is available in a space-saving, low- profile 16-lead QFN package. This presents a 60% saving in space when compared with a discrete imple- mentation. The CM2500-05 is available with optional lead-free finishing. Simplified Block Schematic Simplified Module Schematic (One channel pair only) IN IN IN IN IN B B B B B A A A A A GND IN1 IN2 IN3 IN4 IN5 VCC OUTA OUT1 OUT2 OUT3 OUT4 OUT5 OUTB R R R R R R R R R R R R IN GND A B

© 2004 California Micro Devices Corp. All rights reserved. 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 09/21/04 CM2500-05

Ordering Information

Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. PIN DESCRIPTIONS PINS NAME

DESCRIPTION

No internal connection. OUTA Combined "Functional OR" output of IN1, IN2 and IN3. VCC Positive supply voltage. IN1 Input 1 from switch to be multiplexed. IN2 Input 2 from switch to be multiplexed. IN3 Input 3 from switch to be multiplexed. IN4 Input 4 from switch to be multiplexed. IN5 Input 5 from switch to be multiplexed. NC No internal connection. GND Negative supply voltage. OUTB Combined "Functional OR" output of IN4 and IN5. OUT5 Output 5 to keypad interface lines. OUT4 Output 4 to keypad interface lines. OUT3 Output 3 to keypad interface lines. OUT2 Output 2 to keypad interface lines. OUT1 Output 1 to keypad interface lines. PACKAGE / PINOUT DIAGRAM Note: This drawing is not to scale. Bottom View 16-Lead QFN Package IN1 VCC OUTA NC NC GND OUTB OUT5 OUT1 OUT2 OUT3 OUT4 IN2 IN3 IN4 IN5 QFN16

3 X 3

PART NUMBERING INFORMATION Pads Package Standard Finish Lead-free Finish Ordering Part Number1 Part Marking Ordering Part Number1 Part Marking QFN-16 CM2500-05QF CM250005QF CM2500-05QE CM250005QE

© 2004 California Micro Devices Corp. All rights reserved. 09/21/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com CM2500-05 Specifications Note 1: Equivalent to discharging a 100pF capacitor via a 1.5kΩ resistor (Human body model). Note 1: Operating Characteristics are over Standard Operating Conditions unless otherwise specified. ABSOLUTE MAXIMUM RATINGS PARAMETER RATING UNITS ESD Protection (HBM, All Pins, See Note 1) +2000 V VCC [GND - 0.5] to +6.0 V VI (Inputs and Outputs) [GND - 0.5] to [VCC + 0.5] V Storage Temperature Range -65 to +150 Operating Temperature Range - Junction -40 to +150 0.5 W STANDARD (RECOMMENDED) OPERATING CONDITIONS SYMBOL PARAMETER MIN TYP MAX UNITS VCC Supply Voltage 1.5 5.5 V VI DC Input Voltage VCC V TAMB Ambient Operating Temperature Range -40 ELECTRICAL OPERATING CHARACTERISTICS (NOTE 1) Supply Pins (VBUS = 4.1V to 5.5V; VCC = 1.65V to 3.6V) SYM- BOL PARAMETER CONDITIONS MIN TYP MAX UNITS ICC Supply quiescent current All inputs/outputs floating 0.1 10.0 µA ROUT OUTx Pull-up Resistance 100 150 kΩ RIN2.7 INx Pull-up Resistance VCC=2.7V, PIN at GND 100 150 kΩ RIN1.8 INx Pull-up Resistance VCC=1.8V, PIN at GND 100 240 500 kΩ VD Voltage Drop (OUTx to GND) VCC=2.7V, INx = GND 100 mV VIL Maximum Low-level Input Voltage VCC x 0.3 V VIH Minimum High-level Input Voltage VCC x 0.7 V IL OUTx Leakage Current INx floating 1.0 µA CP OUTx / INx Pin Capacitance At 2.5 Volt bias, 1 MHz pF

© 2004 California Micro Devices Corp. All rights reserved. Figure 1. Typical Application for Extended 4X4 Keyboard board setup provided the same methodology is used. the CM2500-05 are open drain.

• If SW17 is closed, row 1 and 2 are pulled low.
• If SW18 is closed, row 1 and 3 are pulled low.
• If SW19 is closed, row 1 and 4 are pulled low.
• If SW20 is closed, row 2 and 3 are pulled low.
• If SW21 is closed, row 2 and 4 are pulled low.
• If SW17-SW21 are not closed, the standard scan routine is in effect (i.e., one row is pulled low) In larger keypad implementations, multiple CM2500-05 can be used to yield more switches. OUTA SW1 SW3 SW4 SW5 SW6 SW7 SW8 SW9 SW10 SW11 SW12 SW13 SW14 SW15 SW16 Row1 Row2 Row3 Row4 Col1 Col2 Col3 Col4 OUT1 OUT2 OUT3 OUT5 OUT4 OUTB IN1 IN2 IN3 IN5 IN4 GND CM2500-05 VCC GPIO Interface Lines SW2 SW17 SW18 SW19 SW20 SW21 VCC

© 2004 California Micro Devices Corp. All rights reserved. 09/21/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com CM2500-05 Mechanical Details QFN-16 Mechanical Specifications Dimensions for CM2500-05 devices supplied in 16- lead QFN packages are presented below. For complete information on the QFN-16 package, see the California Micro Devices QFN Package Information document. * This is an approximate number which may vary. Package Dimensions for 16-Lead QFN PACKAGE DIMENSIONS Package QFN Leads Dim. Millimeters Inches Min Nom Max Min Nom Max A 0.70 0.75 0.80 .028 .030 .031 0.00 0.02 0.05 0.00 .001 .002

0.20 REF

.008 b 0.20 0.25 0.30 .008 .010 .012 D 2.9 3.0 3.1 .114 .118 .122

1.50 REF

.059 REF 1.00 1.10 1.20 .039 .043 .047 E 2.9 3.0 3.1 .114 .118 .122 .059 REF 1.00 1.10 1.20 .039 .043 .047 e 0.50 TYP. .020 TYP. L 0.30 0.40 0.50 .012 .016 .020 # per tape and reel 2500 pieces* Controlling dimension: millimeters Mechanical Package Diagrams 0.10 C 0.08 C A SIDE VIEW D E 0.15 C 0.15 C BOTTOM VIEW TOP VIEW e b L 0.10 C A B M 16X DAP SIZE 1.8 X 1.8 Pin 1 Marking