MICREL MIC2558BM Datasheet

MIC2558 Micrel

MIC2558

PCMCIA Dual Card Socket VPP Switching Matrix

General Description

The MIC2558 Dual VPP Matrix switches the four voltages
required by PCMCIA (Personal Computer Memory Card
International Association) card V

PP1

and V

Pins. The

PP2

MIC2558 provides selectable 0V, 3.3V, 5.0V, or 12.0V (±5%)
from the system power supply to V

PP1

and V

. Output

PP2

voltage is selected by two digital inputs per VPP pin. Output
current ranges up to 120mA. Four output states, VPP, VCC,
high impedance, and active logic low are available, and V
is independent of V

. An auxiliary control input determines

PP2

PP1

whether the high impedance (open) state or low logic state is
asserted.

In standby mode or full operation, the device draws very little
quiescent current, typically less than 1µA.

The MIC2558 is available in a 14-pin SOIC and a 14-pin
plastic DIP.

Applications

• PCMCIA VPP Pin Voltage Switch

• Power Supply Management

Features

• Complete PCMCIA VPP Switch Matrix in a Single IC

• Dual Matrix allows independent V

PP1

and V

PP2

• Digital Selection of 0V, VCC, VPP, or High
Impedance Output

• No V

PPOUT

Overshoot or Switching Transients

• Break-Before-Make Switching

• Ultra Low Power Consumption

• 120mA VPP (12V) Output Current

• Optional Active Source Clamp for Zero Volt Condition

• 3.3V or 5V Supply Operation

• 14-Pin SOIC Package

Ordering Information

Part Number Temperature Range Package

MIC2558BM –40°C to +85°C 14-pin SOIC
MIC2558BM T&R –40°C to +85°C 14-SO Tape & Reel*
* 2,500 Parts per reel.

Typical Application

V

PP IN

+12V

V

PP OUT 1

V

PP OUT 2

0.1µF

0.1µF

1µF 1µF

V

CC

+3.3V or +5V

2
3

MIC2558

4
5
6
7

Pin Configuration

V

DD

+5V

0.1µF

14
13
12
11
10

9
8

Hi-Z/ Low 1 Control
EN0

1

EN1

1

Hi-Z/ Low 2 Control
EN0

2

EN1

2

V

V

PP

PP

OUT1

+V

CC1

V

PP

+V

CC2

GND

OUT2

NC

IN

2
3

MIC2558

4
5
6

7

EN1 EN0 Hi-Z/Low V

0 0 0 0V, (Sink current)
0 0 1 Hi-Z (No Connect)
01 x VCC (3.3V or 5.0V)
10 x V
1 1 x Hi-Z (No Connect)

14
13

12
11
10

9
8

PP OUT

PP

V

DD
Hi-Z/Low1
EN0

1

EN1

1

Hi-Z/Low2
EN0

2

EN1

2

2-10 1997

MIC2558 Micrel

Absolute Maximum Ratings (Notes 1 and 2)

Power Dissipation, T

SOIC 800 mW

Derating Factors (To Ambient)

SOIC 4 mW/°C
Storage Temperature –65°C to +150°C
Operating Temperature (Die) 125°C
Operating Temperature (Ambient) –40°C to +85°C
Lead Temperature (5 sec) 260°C

AMBIENT

≤ 25°C

Supply Voltage, V

V

CC

V

DD

Logic Input Voltages –0.3V toV
Output Current (each Output)

V

PP OUT

V

PP OUT

PP IN

= 12V 600mA
= V

CC

15V

7.5V

7.5V

DD

250mA

Logic Block Diagram

V

DD

EN1

EN0

HiZ/
LOW

V

14

PP IN

4

2

1

11

V

CC1

V

DD

V

DD

1

12

V

DD

13

1

V

DD

V

DD

V

PP IN

3

V

PP OUT1

1

EN1

2

8

V

PP IN

EN0

V

DD

V

DD

2

9

V

DD

V

DD

HiZ/
LOW

1997 2-11

10

2

5

6

V

PP IN

V

CC2

GND

7

V

PP OUT2