MIC2563A
Micrel
MIC2563A
Dual-Slot PCMCIA/CardBus Power Controller
General Description
Features
The MIC2563A dual-slot PCMCIA (Personal Computer
Memory Card International Association) and CardBus power
controller handles all PC Card slot power supply pins, both
VCC and VPP. The MIC2563A switches between the three
VCC voltages (0V, 3.3V and 5.0V) and the VPP voltages (OFF,
0V, 3.3V, 5V or 12.0V) required by PC Cards. The MIC2563A
switches voltages from the system power supply to VCC and
VPP. Output voltage is selected by two digital inputs each and
output current ranges up to 1A for VCC and 250mA for VPP.
•
•
The MIC2563A provides power management capability controlled by the PC Card logic controller. Voltage rise and fall
times are well controlled. Medium current VPP and high
current VCC output switches are self-biasing: no +12V supply is required for 3.3V or 5V output.
•
•
•
•
•
•
•
•
•
•
•
•
The MIC2563A is designed for efficient operation. In standby
(sleep) mode, the device draws very little quiescent current,
typically 0.3µA. The device and PCMCIA port is protected by
current limiting and overtemperature shutdown. Full crossconduction lockout protects the system power supplies during switching operations.
Single package controls two PC Card slots
High-efficiency, low-resistance switches require no
12V bias supply
No external components required
Output current limit and overtemperature shutdown
Ultra-low power consumption
Complete dual-slot PC Card/CardBus VCC and VPP
switch matrix in a single package
Logic compatible with industry standard PC Card logic
controllers
No voltage shoot-through or switching transients
Break-before-make switching
Digital selection of VCC and VPP voltages
Over 1A VCC output current for each section
Over 250mA VPP output current for each section
Lead-free 28-pin SSOP package
UL recognized, file #179633
Applications
•
•
•
•
•
•
•
•
•
•
The MIC2563A is an improved version of the MIC2563,
offering lower on-resistances and a VCC pull-down clamp in
the OFF mode. It is available in a standard 28-pin SSOP, as
well as an environmentally friendly (lead-free) 28-pin SSOP.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
Dual-slot PC card power supply pin voltage switch
CardBus slot power supply control
Data collection systems
Machine control data input systems
Wireless communications
Bar code data collection systems
Instrumentation configuration/datalogging
Docking stations (portable and desktop)
Power supply management
Power analog switching
Typical Application
5V
(opt)
System
Power 3.3V
Supply
12V
(opt)
VPP IN VCC3 IN VCC5 IN
(opt)
(opt)
A EN0
A EN1
A V CC5_EN
PCMCIA
Card Slot
Controller
VPP1
VPP2 PCMCIA
Card Slot
A
VCC
A V CC3_EN
MIC2563
VPP1
B EN0
B EN1
B V CC5_EN
VPP2 PCMCIA
PCMCIA
Card
Card Slot
Slot
B
VCC
B V CC3_EN
UL Recognized Component
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
March 2004
1
M9999-033004
MIC2563A
Micrel
Ordering Information
Part Number
Temperature Range
Package
Lead-Finish
MIC2563A-0BSM
–40°C to +85°C
28-pin SSOP
Standard
MIC2563A-1BSM
–40°C to +85°C
28-pin SSOP
Standard
MIC2563A-0YSM
–40°C to +85°C
28-pin SSOP
Lead-free
MIC2563A-1YSM
–40°C to +85°C
28-pin SSOP
Lead-free
Note: See “MIC2563A-0 and MIC2563A-1 Control Logic Table“ for a description of the
differences between the logic options.
Pin Configuration
A VCC5 IN 1
28 A VCC OUT
A VCC OUT 2
27 A VCC3 IN
A VCC5 IN 3
26 A VCC OUT
GND 4
25 NC
A VCC5_EN 5
24 A VPP OUT
A VCC3_EN 6
23 A VPP IN
A EN0 7
22 B EN1
A EN1 8
21 B EN0
B VPP IN 9
20 B VCC3_EN
B VPP OUT 10
19 B VCC5_EN
NC 11
18 GND
B VCC OUT 12
17 B VCC5 IN
B VCC3 IN 13
16 B VCC OUT
B VCC OUT 14
15 B VCC5 IN
28-Pin SSOP (SM)
Connect all pins with the same name together for proper operation.
MIC2563A-1 Redefined Pin Assignment
Function
VPP_VCC
VPP_PGM
Pin Number
Slot A
Slot B
7
21
8
22
Some pin names for the MIC2563A-1 are different from the
MIC2563A-0. This table shows the differences. All other pin
names are identical to the MIC2563A-0 as shown in the “Pin
Configuration,” above.
M9999-110503
2
March 2004
MIC2563A
Micrel
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage, VPP IN ............................................... +15V
VCC3 IN ................................................................... +7.5V
VCC5 IN ................................................................... +7.5V
Logic Input Voltages ..................................... –0.3V to +10V
Output Current (each output)
VPP OUT ............................... >200mA, Internally Limited
VCC OUT ..................................... >1A, Internally Limited
Power Dissipation (PD), TA ≤ 25°C .......... Internally Limited
SSOP .................................................................. 800mW
Derating Factors (to Ambient)
SSOP ................................................................. 4mW/°C
Lead Temperature (5 sec.) ........................................ 260°C
Storage Temperature (TS) ....................... –65°C to +150°C
Ambient Temperature (TA) ......................... –40°C to +85°C
Operating Temperature (Die) .................................... 125°C
Package Thermal Resistance (θJA)
SSOP .................................................................. 84°C/W
Electrical Characteristics(3)
VCC3 IN = 3.3V, VCC5 IN = 5.0V, VPP IN = 12V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
Digital Inputs
VIH
Logic 1 Input Voltage
2.2
7.5
V
VIL
Logic 0 Input Voltage
–0.3
0.8
V
IIN
Input Current
0V < VIN < 5.5V
±1
µA
IPP OUT
Hi-Z
High Impedance Output
Leakage Current
Shutdown mode
0 ≤ VPP OUT ≤ 12V
10
µA
IPPSC
Short Circuit Current Limit
VPP OUT = 0
RO
Switch Resistance
Select VPP OUT = 5V
Select VPP OUT = 3.3V
IPP OUT = –100mA (Sourcing)
1.8
3.3
2.5
5
Ω
RO
Switch Resistance,
Select VPP OUT = 12V
VPP IN = 12V
IPP OUT = –100 mA (Sourcing)
0.6
1
Ω
RO
Switch Resistance,
Select VPP OUT = 0V
Select VPP OUT = clamped to ground
IPP OUT = 50µA (Sinking)
2500
3900
Ω
VPP OUT = Hi-Z to 10% of 3.3V
5
50
µs
VPP OUT = Hi-Z to 10% of 5V
10
50
µs
VPP OUT = Hi-Z to 10% of 12V
70
250
µs
VPP Output
1
0.2
0.3
A
VPP Switching Time (See Figure 1)
t1
Output Turn-On Delay(4)
t2
t3
VPP OUT = 10% to 90% of 3.3V
100
200
800
µs
VPP OUT = 10% to 90% of 5V
100
300
1000
µs
VPP OUT = 10% to 90% of 12V
100
225
800
µs
VPP OUT = 3.3V to 90% of 12V
100
250
1000
µs
t8
VPP OUT = 5V to 90% of 12V
100
200
800
µs
t9
VPP OUT = 12V to 90% of 3.3V
100
200
800
µs
t10
VPP OUT = 12V to 90% of 5V
100
350
1200
µs
t4
Output Rise
Time(4)
t5
t6
t7
Output Transition
Timing(4)
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating. Devices are ESD sensitive. Handling precautions recommended.
3. Specification for packaged product only.
4. RL = 100Ω connected to ground.
5. Delay from commanding Hi-Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown conditions.
March 2004
3
M9999-033004
MIC2563A
Symbol
Micrel
Parameter
Condition
Min
Typ
Max
Units
VPP OUT = 3.3V to Hi-Z
200
1000
ns
VPP OUT = 5V to Hi-Z
200
1000
ns
VPP OUT = 12V to Hi-Z
200
1000
ns
VPP OUT = 90% to 10% of 3.3V
50
1000
ns
t12
VPP OUT = 90% to 10% of 5V
50
1000
ns
t13
VPP OUT = 90% to 10% of 12V
300
2000
ns
VPP Switching Time (See Figure 1) continued
t14
Output Turn-Off Delay Time(4, 5)
t15
t16
t11
Output Turn-Off Fall
Time(4)
VCC Output
ICCSC
Short Circuit Current Limit
VCC OUT = 0
1
1.5
A
RO
Switch Resistance
Select VCC OUT = 3.3V
ICC OUT = –1A (Sourcing)
100
150
mΩ
Select VCC OUT = 5V
ICC OUT = –1A (Sourcing)
70
100
mΩ
Select VCC OUT = clamped to ground
ICC OUT = 0.1mA (Sinking)
500
3900
Ω
VCC OUT = 0V to 10% of 3.3V
300
1500
µs
VCC OUT = 0V to 10% of 5.0V
750
3000
µs
VCC Switching Time (See Figure 2)
t1
Output Turn-On Delay Time(6)
t2
t3
Output Rise Time(6)
t4
t7
Output Turn-Off Delay(6, 7)
t8
t5
Output Fall
Time(6)
t6
VCC OUT = 10% to 90% of 3.3V
200
700
2500
µs
VCC OUT = 10% to 90% of 5V
200
1500
6000
µs
VCC OUT = 3.3V
2.4
8
ms
VCC OUT = 5V
2.8
8
ms
VCC OUT = 90% to 10% of 3.3V
100
240
1000
µs
VCC OUT = 90% to 10% of 5.0V
100
600
2000
µs
8
50
µA
VCC OUT = 0V (Sleep Mode)
0.2
10
µA
VCC OUT = 5V or 3.3V, ICC OUT = 0
40
100
µA
VCC OUT = 0V (Sleep Mode)
0.1
10
µA
VPP OUT = 3.3V or 5V, IPP OUT = 0
0.3
4
µA
VPP OUT = Hi-Z, 0 or VPP
0.3
4
µA
VCC5 IN not required for operation
5.0
6
V
3.3
6
V
12.0
14.5
V
Power Supply
ICC5
ICC3
IPP IN
VCC5
VCC3
VPP IN
VCC5 IN Supply Current (5V)
VCC3 IN Supply Current (3.3V)(8)
VPP IN Supply Current (12V)(9)
Operating Input Voltage (5V)
Operating Input Voltage
VCC OUT = 5V or 3.3V, ICC OUT = 0
(3.3V)(8)
Operating Input Voltage (12V)
3.0
VPP IN not required for
operation(10)
Thermal Shutdown
TSD
Thermal Shutdown Temperature
130
°C
Notes:
4. RL = 100Ω connected to ground.
5. Delay from commanding Hi-Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown conditions.
6. RL = 10Ω connected to ground.
7. Delay from commanding Hi-Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown conditions.
8. The MIC2563A uses VCC3 IN for operation. For single 5V supply systems, connect 5V to both VCC3 IN and VCC5 IN. See “Applications Information”
section for further details.
9. VPP IN is not required for operation.
10. VPP IN must be either high impedance or greater than or approximately equal to the highest voltage VCC in the system. For example, if both 3.3V
and 5V are connected to the MIC2563A, VPP IN must be either 5V, 12V, or high impedance.
M9999-110503
4
March 2004
MIC2563A
Micrel
A
VPP
Enable
B
VPP to 3.3V
C
VPP to 12V
D
VPP to 3.3V
E
F
VPP to 5V
VPP
OFF
G
VPP to 12V
H
VPP to 5V
J
VPP OFF
K
VPP to 12V
VPP OFF
0
t13
t7
t10
t8
t9
t6
t16
12V
t3
VPP
Output
t2
t4
t15
t1
t11
t5
t12
5V
t14
3.3V
0
Figure 1. MIC2563A VPP Timing Diagram
VPP Enable is shown generically: refer to “MIC2563A-0 and MIC2563A-1 Control Logic Tables.” At time “A,” VPP = 3.3V is
selected. At “B,” VPP is set to 12V. At “C,” VPP = 3.3V (from 12V). At “D,” VPP is disabled. At “E,” VPP is programmed to 5V.
At “F,” VPP is set to 12V. At “G,” VPP is programmed to 5V. At “H,” VPP is disabled. At “J,” VPP is set to 12V. And at “K,” VPP
is again disabled. RL = 100Ω for all measurements. Load capacitance is negligible.
A
VCC
Enable
B
C
VCC to 3.3V
D
VCC OFF
VCC to 5V
VCC OFF
0
t2
t1
t8
t4
5V
t3
t6
t7
t5
3.3V
VCC
Output
0
Figure 2. MIC2563A VCC Timing Diagram
VCC Enable is shown generically: refer to “MIC2563A-0 and MIC2563A-1 Control Logic Tables” for specific control logic input.
At time “A,” VCC is programmed to 3.3V. At “B,” VCC is disabled. At “C,” VCC is programmed to 5V. And at “D,” VCC is disabled.
RL = 10Ω.
March 2004
5
M9999-033004
MIC2563A
Micrel
MIC2563A-0 Control Logic Table
VCC5_EN
VCC3_EN
EN1
EN0
VCC OUT
VPP OUT
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Clamped to Ground
Clamped to Ground
Clamped to Ground
Clamped to Ground
3.3
3.3
3.3
3.3
5
5
5
5
3.3
3.3
3.3
3.3
High-Z
High-Z
High-Z
Clamped to Ground
High-Z
3.3
12
Clamped to Ground
High-Z
5
12
Clamped to Ground
High-Z
3.3
5
Clamped to Ground
MIC2563A-1 Control Logic Table (compatible with Cirrus Logic CL-PD6710 & PD672x-series Controllers)
VCC5_EN
VCC3_EN
VPP_PGM
VPP_VCC
VCC OUT
VPP OUT
0
0
0
0
0
0
0
0
1
0
1
0
Clamped to Ground
Clamped to Ground
Clamped to Ground
Clamped to Ground
High-Z
High-Z
0
0
0
1
1
0
1
0
Clamped to Ground
5
High-Z
Clamped to Ground
0
0
0
1
1
1
0
1
1
1
0
1
5
5
5
5
12
High-Z
1
1
0
0
0
0
0
1
3.3
3.3
Clamped to Ground
3.3
1
1
0
0
1
1
0
1
3.3
3.3
12
High-Z
1
1
1
1
1
1
0
0
1
0
1
0
Clamped to Ground
Clamped to Ground
Clamped to Ground
Clamped to Ground
High-Z
High-Z
1
1
1
1
Clamped to Ground
High-Z
M9999-110503
6
March 2004
MIC2563A
Micrel
Logic Block Diagram
A V PP IN
(optional)
A EN1
A V PP OUT
A EN0
A V CC5_EN
MIC2563
Section A
Control
Logic
A V CC OUT
A V CC3_EN
A V CC3 IN
A V CC5 IN
ILIMIT / Thermal
Shutdown
Gate Drive
Generator
B V PP IN
(optional)
B EN1
B V PP OUT
B EN0
B V CC5_EN
MIC2563
Section B
Control
Logic
B V CC OUT
B V CC3_EN
VCC3 IN
VCC5 IN
ILIMIT / Thermal
Shutdown
Gate Drive
Generator
March 2004
GND
7
M9999-033004
MIC2563A
Micrel
Applications Information
PC Card power control for two sockets is easily accomplished
using the MIC2563A PC Card/CardBus slot VCC and VPP
power controller IC. Four control bits per socket determine
VCC OUT and VPP OUT voltage and standby/operate mode
condition. VCC outputs of 3.3V and 5V at the maximum
allowable PC Card current are supported. VPP OUT output
voltages of VCC (3.3V or 5V), VPP, 0V, or a high impedance
state are available. When the VCC clamped to ground condition is selected, the device switches into “sleep” mode and
draws only nanoamperes of leakage current. Full protection
from hot switching is provided which prevents feedback from
the VCC OUT (from 5V to 3.3V, for example) by locking out the
low-voltage switch until the initial switch’s gate voltage drops
below the desired lower VCC.
If no card is inserted or the system is in sleep mode, the slot
logic controller outputs a (VCC3 IN, VCC5 IN) = (0,0) to the
MIC2563A, which shuts down VCC. This also places the
switch into a high impedance output shutdown (sleep) mode,
where current consumption drops to nearly zero, with only
tiny CMOS leakage currents flowing.
Internal device control logic, MOSFET drive and bias voltage
is powered from VCC3 IN. The high voltage bias is generated
by an internal charge pump quadrupler. Systems without
3.3V may connect VCC3 IN to 5V. Input logic threshold
voltages are compatible with common PC Card logic controllers using either 3.3V or 5V supplies.
The PC Card specification defines two VPP supply pins per
card slot. The two VPP supply pins may be programmed to
different voltages. VPP is primarily used for programming
Flash memory cards. Implementing two independent VPP
voltages is easily accomplished with the MIC2563A and a
MIC2557 PCMCIA VPP switching matrix. Figure 3 shows this
full configuration, supporting independent VPP and both 5.0V
and 3.3V VCC operation. However, few logic controllers
support multiple VPP — most systems connect VPP1 to VPP2
and the MIC2557 is not required. This circuit is shown in
Figure 4.
The MIC2563A operates from the computer system’s main
power supply. Device logic and internal MOSFET drive is
generated internally by charge pump voltage multipliers
powered from VCC3 IN. Switching speeds are carefully controlled to prevent damage to sensitive loads and meet all PC
Card Specification timing requirements.
Supply Bypassing
External capacitors are not required for operation. The
MIC2563A is a switch and has no stability problems. For best
results however, bypass VCC3 IN, VCC5 IN, and VPP IN inputs
with 1µF capacitors to improve output ripple. As all internal
device logic and comparison functions are powered from the
VCC3 IN line, the power supply quality of this line is the most
important, and a bypass capacitor may be necessary for
some layouts. Both VCC OUT and VPP OUT pins may use
0.01µF to 0.1µF capacitors for noise reduction and electrostatic discharge (ESD) damage prevention.
During flash memory programming with standard (+12V)
flash memories, the PC Card slot logic controller outputs a
(0, 1) to the EN0, EN1 control pins of the MIC2563A, which
connects VPP IN (nominally +12V) to VPP OUT. The low ON
resistance of the MIC2563A switch allows using a small
bypass capacitor on the VPP OUT pins, with the main filtering
action performed by a large filter capacitor on VPP IN (usually
the main power supply filter capacitor is sufficient). Using a
small-value capacitor such as 0.1µF on the output causes
little or no timing delays. The VPP OUT transition from VCC to
12.0V typically takes 250µs. After programming is completed, the controller outputs a (EN1, EN0) = (0,1) to the
MIC2563A, which then reduces VPP OUT to the VCC level.
Break-before-make switching action and controlled rise times
reduces switching transients and lowers maximum current
spikes through the switch.
PC Card Slot Implementation
The MIC2563A is designed for full compatibility with the
PCMCIA PC Card Specification, (March 1995), including the
CardBus option.
When a memory card is initially inserted, it should receive
VCC (either 3.3V ± 0.3V or 5.0V ±5%). The initial voltage is
determined by a combination of mechanical socket “keys”
and voltage sense pins. The card sends a handshaking data
stream to the controller, which then determines whether or
not this card requires VPP and if the card is designed for dual
VCC. If the card is compatible with and desires a different VCC
level, the controller commands this change by disabling VCC,
waiting at least 100ms, and then re-enabling the other VCC
voltage.
Figure 5 shows MIC2563A configuration for situations where
only a single +5V VCC is available.
Output Current and Protection
MIC2563A output switches are capable of passing the maximum current needed by any PC Card. The MIC2563A meets
or exceeds all PCMCIA specifications. For system and card
protection, output currents are internally limited. For full
system protection, long term (millisecond or longer) output
short circuits invoke overtemperature shutdown, protecting
the MIC2563A, the system power supplies, the card socket
pins, and the PC Card.
VCC switches are turned ON and OFF slowly. If commanded
to immediately switch from one VCC to the other (without
turning OFF and waiting 100ms first), enhancement of the
second switch begins after the first is OFF, realizing breakbefore-make protection. VPP switches are turned ON slowly
and OFF quickly, which also prevents cross conduction.
M9999-110503
8
March 2004
MIC2563A
Micrel
5V
(opt)
System
Power 3.3V
Supply
12V
(opt)
VPP1
VPP IN VCC3 IN VCC5 IN
(opt)
EN0
VPP2 PCMCIA
Card Slot
A
VCC
EN1
VCC5_EN
VCC3_EN
MIC2563
VPP1
PCMCIA
Card Slot
Controller
EN0
PCMCIA
VPP2 PCMCIA
Card Slot
Slot
Card
B
VCC
EN1
VCC5_EN
VCC3_EN
EN0
EN1
MIC2558
EN0
EN1
Figure 3. PC Card Slot Power Control Application
with Dual VCC (5.0V or 3.3V) and Separate VPP1 and VPP2
5V
(opt)
System
Power 3.3V
Supply
12V
(opt)
VPP IN VCC3 IN VCC5 IN
(opt)
(opt)
A EN0
A EN1
A V CC5_EN
PCMCIA
Card Slot
Controller
VPP1
VPP2 PCMCIA
Card Slot
A
VCC
A V CC3_EN
MIC2563
VPP1
B EN0
B EN1
B V CC5_EN
VPP2 PCMCIA
PCMCIA
Card
Card Slot
Slot
B
VCC
B V CC3_EN
Figure 4. Typical PC Card Slot Power Control Application
with Dual VCC (5.0V or 3.3V)
Note: VPP1 and VPP2 are driven together.
March 2004
9
M9999-033004
MIC2563A
Micrel
5V
System
Power
Supply
12V
(opt)
VPP IN VCC3 IN VCC5 IN
(opt)
A EN0
VPP2 PCMCIA
Card Slot
A
VCC
A EN1
A V CC5_EN
PCMCIA
Card Slot
Controller
VPP1
A V CC3_EN
MIC2563
VPP1
B EN0
VPP2 PCMCIA
PCMCIA
Card
Card Slot
Slot
B
VCC
B EN1
B V CC5_EN
B V CC3_EN
Figure 5. PC Card Slot Power Control Application
without a 3.3V VCC Supply
Note: VCC3 IN and VCC5 IN lines are driven together. The MIC2563A is powered from the VCC3 IN line. In this configuration,
VCC OUT will be 5V when either VCC3 or VCC5 is enabled.
RST#
VCC
SER_DATA
2
3
4
5
6
7
8
9
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
74x175
1 CLR
20
19
4
18
5
17
12
16
13
15
4
14
5
13
12
12
13
9 CLK
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
D
Q
2
7
10
15
2
7
10
15
A_VPP_PGM (Pin 8)
A_VPP_VCC (Pin 7)
A_VCC5_EN (Pin 5)
A_VCC3_EN (Pin 6)
B_VPP_PGM (Pin 22)
B_VPP_VCC (Pin 21)
B_VCC3_EN (Pin 19)
B_VCC5_EN (Pin 20)
10
SER_CLK
11
74x574
1 CLR
1
9 CLK
74x175
SER_LATCH
Figure 6. Interfacing the MIC2563A with a Serial-Output Data Controller
Pinouts shown are for the MIC2563A-1 and a three-wire serial controller.
M9999-110503
10
March 2004
MIC2563A
Micrel
Serial Control
Figure 6 shows conversion from a three-wire serial interface,
such as used by the Cirrus Logic CL-PD6730, to the standard
eight-line parallel interface used by the MIC2563A-1. This
interface requires three common, low cost 7400-series logic
ICs:
Serial Control Adapter PC Board Layout
• 74x574 Octal D Flip-Flop
• 74x175 Quad Flip-Flop with Latches (two needed)
Either 3.3V or 5V logic devices may be used, depending upon
the control voltage employed by the slot logic controller. Pin
numbers in parenthesis refer to the MIC2563A-1BSM. Gerber
files for this PC board layout are available to Micrel customers. Please contact Micrel directly.
Another serial-to-parallel solution for this application is the
74HC594, 8-bit shift register with output registers. This device contains the eight D flip-flops plus has latched outputs
suitable for this purpose.
Component Key
U1 .................... MIC2563
U2, U3 ............. 74x175
U4 .................... 74x574
March 2004
11
M9999-033004
MIC2563A
Micrel
Package Information
5.40 (0.213)
5.20 (0.205)
7.90 (0.311)
7.65 (0.301)
DIMENSIONS:
MM (INCH)
0.875 (0.034) REF
10.33 (0.407)
10.07 (0.396)
2.00 (0.079)
1.73 (0.068)
0.38 (0.015)
0.25 (0.010)
0.65 (0.0260) BSC
0.21 (0.008)
0.05 (0.002)
COPLANARITY:
0.10 (0.004) MAX
10°
4°
0.22 (0.009)
0.13 (0.005)
1.25 (0.049) REF
0°
–8°
0.95 (0.037)
0.55 (0.022)
28-Pin SSOP (SM)
MICREL, INC.
TEL
1849 FORTUNE DRIVE SAN JOSE, CA 95131
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
USA
http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2004 Micrel, Incorporated.
M9999-110503
12
March 2004
工商网监
湘ICP备2023018690号
