Intersil HC68T1M2 Cmos serial real-time clock with ram and power sense/control Datasheet

CDP68HC68T1
®
Data Sheet
March 17, 2006
FN1547.7
CMOS Serial Real-Time Clock With RAM
and Power Sense/Control
Features
The CDP68HC68T1 Real-Time Clock provides a
time/calendar function, a 32 byte static RAM, and a 3 wire
Serial Peripheral Interface (SPI Bus). The primary function of
the clock is to divide down a frequency input that can be
supplied by the on-board oscillator in conjunction with an
external crystal or by an external clock source. The internal
oscillator can operate with a 32kHz, 1MHz, 2MHz, or 4MHz
crystal. An external clock source with a 32kHz, 1MHz, 2MHz,
4MHz, 50Hz or 60Hz frequency can be used to drive the
CDP68HC68T1. The time registers hold seconds, minutes,
and hours, while the calendar registers hold day-of-week,
date, month, and year information. The data is stored in BCD
format. In addition, 12 or 24 hour operation can be selected.
In 12 hour mode, an AM/PM indicator is provided. The T1
has a programmable output which can provide one of seven
outputs for use elsewhere in the system.
• Full Clock Features
- Seconds, Minutes, Hours (12/24, AM/PM), Day of
Week, Date, Month, Year (0-99), Automatic Leap Year
Computer handshaking is controlled with a “wired-OR” interrupt
output. The interrupt can be programmed to provide a signal as
the result of: 1) an alarm programmed to occur at a
predetermined combination of seconds, minutes, and hours; 2)
one of 15 periodic interrupts ranging from sub-second to once
per day frequency; 3) a power fail detect. The PSE output and
the VSYS input are used for external power control. The CPUR
output is available to reset the processor under power-down
conditions. CPUR is enabled under software control and can
also be activated via the CDP68HC68T1’s watchdog. If
enabled, the watchdog requires a periodic toggle of the CE pin
without a serial transfer.
• SPI (Serial Peripheral Interface)
• 32 Word x 8-Bit RAM
• Seconds, Minutes, Hours Alarm
• Automatic Power Loss Detection
• Low Minimum Standby (Timekeeping) Voltage . . . . . 2.2V
• Selectable Crystal or 50/60Hz Line Input
• Buffered Clock Output
• Battery Input Pin that Powers Oscillator and also
Connects to VDD Pin When Power Fails
• Three Independent Interrupt Modes
- Alarm
- Periodic
- Power-Down Sense
• Pb-Free Plus Anneal Available (RoHS Compliant)
Pinouts
CDP68HC68T1 (PDIP, SOIC)
TOP VIEW
CLKOUT
1
16 VDD
CPUR
2
15 XTAL OUT
INT
3
CDP68HC68T1 (SOIC)
TOP VIEW
CLK OUT
1
20 VDD
CPUR
2
19 XTAL OUT
14 XTAL IN
INT
3
18 XTAL IN
NC
4
17 NC
SCK
4
13 VBATT
MOSI
5
12 VSYS
SCK
5
16 VBATT
MISO
6
11 LINE
MOSI
6
15 VSYS
CE
7
10 POR
MISO
7
14 NC
VSS
8
9
PSE
CE
8
13 NC
VSS
9
12 LINE
PSE 10
11 POR
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Harris Corporation 1997. Copyright Intersil Americas Inc. 2001, 2004-2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Ordering Information
PART MARKING
TEMP
RANGE
(°C)
CDP68HC68T1E
CDP68HC68T1E
-40 to 85 16 Ld PDIP
CDP68HC68T1EZ
(Note)
CDP68HC68T1EZ -40 to 85 16 Ld PDIP** E16.3
(Pb-free)
CDP68HC68T1M*
68HC68T1M
-40 to 85 20 Ld SOIC
M20.3
CDP68HC68T1MZ*
(Note)
68HC68T1MZ
-40 to 85 20 Ld SOIC
(Pb-free)
M20.3
CDP68HC68T1M2*
HC68T1M2
-40 to 85 16 Ld SOIC
M16.3
-40 to 85 16 Ld SOIC
(Pb-free)
M16.3
PART NUMBER
CDP68HC68T1M2Z* HC68T1M2Z
(Note)
PKG
PACKAGE DWG. #
E16.3
*Add “96” suffix for taoe and reel.
**Pb-free PDIPs can be used for through hole wave solder processing only.
They are not intended for use in Reflow solder processing. applications.
Pin number references throughout this specification refer to the 16 lead
PDIP/SOIC. See pinouts for cross reference.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb
and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the
Pb-free requirements of IPC/JEDEC J STD-020.
2
FN1547.7
March 17, 2006
Absolute Maximum Ratings
Thermal Information
Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . VSS -0.3V to VDD +0.3V
Current Drain Per Input Pin Excluding VDD and VSS, I . . . . . . 10mA
Current Drain Per Output Pin, I . . . . . . . . . . . . . . . . . . . . . . . . 40mA
Thermal Resistance (Typical, Note 1)
Operating Conditions
Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3.0V to +6.0V
Standby (Timekeeping) Voltage . . . . . . . . . . . . . . . . . +2.2V to +6.0V
Temperature Range
CDP68HC68T1E (PDIP Package) . . . . . . . . . . . . . .-40°C to 85°C
CDP68HC68T1M/M2 (SOIC Packages) . . . . . . . . .-40°C to 85°C
Input High Voltage . . . . . . . . . . . . . . . . . . . . . . . .(0.7 x VDD) to VDD
Input Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 0V to (0.3 x VDD)
Serial Clock Frequency (fSCK). . . . . . . . . . . . . . . . . . +3.0V to +6.0V
θJA (°C/W)
16 Ld PDIP* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
16 Ld SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100
20 Ld SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
95
Maximum Junction Temperature (Plastic) . . . . . . . . . . . . . . . . 150°C
Maximum Storage Temperature Range (TSTG). . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C
(SOIC, Lead Tips Only)
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing.
applications.
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Static Electrical Specifications At TA = -40°C to +85°C, VDD = VBATT = 5V ±5%, except as noted.
CDP68HC68T1
PARAMETER
CONDITIONS
Quiescent Device CurrentIDD
MIN
(NOTE 2) TYP
MAX
UNITS
-
1
10
µA
V
Output Voltage High LevelVOH
IOH = -1.6mA, VDD = 4.5V
3.7
-
-
Output Voltage Low LevelVOL
IOL = 1.6mA, VDD = 4.5V
-
-
0.4
Output Voltage High LevelVOH
IOH ≤ 10µA, VDD = 4.5V
4.4
-
-
Output Voltage Low LevelVOL
IOL ≤ 10µA, VDD = 4.5V
-
-
0.1
Input Leakage CurrentIIN
-
-
±1
Three-State Output Leakage CurrentIOUT
-
-
±10
32kHz
-
0.08
0.01
1MHz
-
0.5
0.6
2MHz
-
0.7
0.84
4MHz
-
1
1.2
32kHz
-
0.02
0.024
1MHz
-
0.1
0.12
2MHz
-
0.2
0.24
4MHz
-
0.4
0.5
32kHz
-
20
25
1MHz
-
200
250
2MHz
-
300
360
4MHz
-
500
600
Operating Current (Note 3)
(ID + IB) VDD = VB = 5V
Crystal Operation
Pin 14
External Clock (Squarewave) (Note 3)
(ID + IB) VDD = VS = 5V
Standby Current (Note 3)IB
VS = 3V
Crystal Operation
Operating Current (Note 3)
VDD = 5V, VB = 3V
Crystal Operation
3
µA
mA
µA
ID
IB
ID
IS
mA
32kHz
-
25
15
30
20
1MHz
-
0.08
0.15
0.1
0.18
2MHz
-
0.15
0.25
0.18
0.3
4MHz
-
0.3
0.4
0.36
0.5
FN1547.7
March 17, 2006
Static Electrical Specifications At TA = -40°C to +85°C, VDD = VBATT = 5V ±5%, except as noted. (Continued)
CDP68HC68T1
PARAMETER
CONDITIONS
MIN
(NOTE 2) TYP
MAX
UNITS
-
10
12
µA
-
-
2
pF
Maximum Rise and Fall Timestr, tf
(Except XTAL Input and POR Pin 10)
-
-
2
µs
Input Voltage (Line Input Pin Only, Power Sense Mode)
0
10
12
V
VSYS > VBVT
(For VB Not Internally Connected to VDD)
-
1.0
-
V
100
75
-
ns
32kHz
Standby Current (Note 3)IB
VB = 2.2V
Crystal Operation
Input Capacitance CIN
VIN = 0, TA = 25°C
Power-On Reset (POR) Pulse Width
NOTES:
2. Typical values are for TA = 25°C and nominal VDD.
3. Clock out (Pin 1) disabled, outputs open circuited. No serial access cycles.
4
FN1547.7
March 17, 2006
Functional Block Diagram
CE
FREEZE
CIRCUIT
AM - PM AND
HOUR LOGIC
CALENDAR
LOGIC
LINE
50/60Hz
XTAL IN
XTAL OUT
OSCILLATOR
PRESCALE
SECOND
MINUTE
HOUR
DAY/DAY
OF WEEK
MONTH
5
VBATT
PRESCALE
SELECT
CLOCK
OUT
INT
CLOCK
AND
INT
LOGIC
VDD
VSS
CLOCK
SELECT
CLOCK
CONTROL
REGISTER
8-BIT DATA BUS
INTERRUPT
CONTROL
REGISTER
YEAR
COMPARATOR
SECOND
LATCH
MINUTE
LATCH
HOUR
LATCH
LINE
VSYS
POR
POWER
SENSE
CONTROL
INT STATUS
REGISTER
PSE
32 X 8
RAM
CPUR
SCK
MISO
MOSI
SERIAL
INTERFACE
FIGURE 1. REAL TIME CLOCK FUNCTIONAL DIAGRAM
FN1547.7
March 17, 2006
0
$00
32
SECONDS
R, W
$20
33
MINUTES
R, W
$21
34
HOURS
R, W
$22
35
DAY OF WEEK
R, W
$23
36
DATE
R, W
$24
37
MONTH
R, W
$25
$1F
38
YEARS
R, W
$26
$20
39
NOT USED
40
SEC ALARM
W
$28
41
MIN ALARM
W
$29
W
$2A
32 RAM LOCATIONS
31
32
CLOCK/CALENDAR
$27
50
$32
42
HRS ALARM
51
$33
43
NOT USED
$2B
44
NOT USED
$2C
45
NOT USED
$2D
46
NOT USED
$2E
47
NOT USED
48
STATUS REGISTER
$3F
49
$55
50
13 BYTES UNUSED
63
85
R = READABLE
TEST MODE
$2F
R
$30
CONTROL REGISTER
R, W
$31
INTERRUPT CONTROL REGISTER
R, W
$32
W = WRITABLE
FIGURE 2. ADDRESS MAP
TABLE 1. CLOCK/CALENDAR AND ALARM DATA MODES
DECIMAL RANGE
BCD DATA RANGE
(NOTE 4)
BCD DATE EXAMPLE
Seconds
0-59
00-59
18
21
Minutes
0-59
00-59
49
22
Hours
12 Hour Mode
(Note 5)
1-12
81-92 (AM)
A1-B2 (PM)
A3
Hours
24 Hour Mode
0-23
00-23
15
23
Day of the Week
(Sunday = 1)
1-7
01-07
03
24
Day of the Month
(Date)
1-31
01-31
29
25
Month
Jan = 1, Dec = 12
1-12
01-12
10
26
Years
0-99
00-99
85
28
Alarm Seconds
0-59
00-59
18
29
Alarm Minutes
0-59
00-59
49
2A
Alarm Hours (Note 6)
12 Hour Mode
1-12
01-12 (AM)
21-32 (PM)
23
Alarm Hours
24 Hour Mode
0-23
00-23
15
ADDRESS LOCATION (H)
20
FUNCTION
NOTES:
4. Example: 3:49:18, Tuesday. Oct. 29,1985.
5. Most significant Bit, D7, is “0” for 24 hours, and “1” for 12 hour mode. Data Bit D5 is “1” for P.M. and ‘0” for A.M. in 12 hour mode.
6. Alarm hours. Data Bit D5 is “1” for P.M. and “0” for A.M. in 12 hour mode. Data Bits D7 and D6 are DON’T CARE.
6
FN1547.7
March 17, 2006
Programmers Model - Clock Registers
HEX ADDRESS
WRITE/READ REGISTERS
NAME
DB7
DB0
TENS 0-5
UNITS 0-9
SECONDS (00-59)
TENS 0-5
UNITS 0-9
MINUTES (00-59)
UNITS 0-9
DB7, 1 = 12 HR., 0 = 24 HR.
DB = 1 PM, 0 = AM
HOURS (01-12 OR 00-23
20
21
12
HR
24
22
X
23
24
25
26
31
X
PM/AM
TENS 0-2
X
X
X
X
DAY OF WK (01-07) SUNDAY = 1
UNITS 1-7
DATE
DAY OF MONTH
01-28
29
30
31
TENS 0-3
UNITS 0-9
TENS 0-1
UNITS 0-9
MONTH (01-12) JAN = 1
DEC = 12
TENS 0-9
UNITS 0-9
YEARS (00-99)
7
6
5
4
3
2
1
0
CONTROL
7
6
5
4
3
2
1
0
INTERRUPT
32
WRITE ONLY REGISTERS
28
29
X
2A
TENS 0-5
UNITS 0-9
ALARM SECONDS (00-59)
TENS 0-5
UNITS 0-9
ALARM MINUTES (00-59)
UNITS 0-9
ALARM HOURS (01-12 OR 00-23)
PLUS AM/PM IN 12 HR. MODE
PM = 1, AM = 0
X
PM/AM
TENS 0-2
READ ONLY REGISTERS
7
30
6
5
4
7
6
D7
D6
3
2
5
1
BIT
D5
4
D4
0
STATUS
3
2
1
D3
D2
D1
0
D0
RAM DATA BYTE
HEX ADDRESS 00-1F
NOTE: X = Don’t care writes, X = 0 when read.
7
FN1547.7
March 17, 2006
Functional Description
The SPI real-time clock consists of a clock/calendar and a
32 x 8 RAM. Communications is established via the SPI
(Serial Peripheral Interface) bus. In addition to the
clock/calendar data from seconds to years, and system
flexibility provided by the 32-byte RAM, the clock features
computer handshaking with an interrupt output and a
separate squarewave clock output that can be one of 7
different frequencies. An alarm circuit is available that
compares the alarm latches with the seconds, minutes and
hours time counters and activates the interrupt output when
they are equal. The clock is specifically designed to aid in
power-down/up applications and offers several pins to aid
the designer of battery backup systems.
Mode Select
The voltage level that is present at the VSYS input pin at the
end of power-on-reset selects the device to be in the single
supply or battery backup mode.
Single-Supply Mode
If VSYS is a logic high when power-on-reset is completed,
CLK OUT, PSE and CPUR will be enabled and the device
will be completely operational. CPUR will be placed low if the
logic level at the VSYS pin goes low. If the output signals
CLK OUT, PSE and CPUR are disabled due to a powerdown instruction, VSYS brought to a logic low and then to a
logic high will re-enable these outputs. An example of the
single-supply mode is where only one supply is available
and VDD , VBATT and VSYS are tied together to the supply.
years information. Data in the counters is in BCD format.
The hours counter utilizes BCD for hour data plus bits for
12/24 hour and AM/PM. The 7 time counters are accessed
serially at addresses 20H through 26H. (See Table 1).
RAM
The real-time clock also has a static 32 x 8 RAM that is
located at addresses 00-1FH. Transmitting the
address/control word with bit-5 low selects RAM access. Bits
0 through 4 select the RAM location.
Alarm
The alarm is set by accessing the three alarm latches and
loading the required data. The alarm latches consist of
seconds, minutes and hours registers. When their outputs
equal the values in the seconds, minutes and hours time
counters, an interrupt is generated. The interrupt output will
go low if the alarm bit in the Interrupt Control Register is set
high. The alarm interrupt bit in the Status Register is set
when the interrupt occurs (see Pin Functions, INT Pin). To
preclude a false interrupt when loading the time counters,
the alarm interrupt bit should be set low in the Interrupt
Control Register. This procedure is not required when the
alarm time is set.
Watchdog Function (See Figure 6)
When bit 7 in the Interrupt Control Register is set high, the
Clock’s CE (chip enable) pin must be toggled at a regular
interval without a serial data transfer. If the CE is not toggled,
the clock will supply a CPU reset pulse and bit 6 in the Status
Register will be set. Typical service and reset times are listed
below.
Battery Backup Mode
50Hz
60Hz
XTAL
If VSYS is a logic low at the end of power-on-reset, CLK
OUT, PSE and CPUR will be disabled (CLK OUT, PSE and
CPUR low). This condition will be held until VSYS rises to a
threshold (about 1.0V) above VBATT. The outputs CLK OUT,
PSE and CPUR will then be enabled and the device will be
operational. If VSYS falls below a threshold above VBATT the
outputs CLK OUT, PSE and CPUR will be disabled. An
example of battery backup operation occurs if VSYS is tied to
VDD and VDD is not connected to a supply when a battery is
connected to the VBATT pin. (See Pin Functions, VBATT for
Battery Backup Operation.)
Clock Out
Clock/Calendar (See Figures 1 and 2)
Control Registers and Status Registers
The clock/calendar portion of this device consists of a long
string of counters that is toggled by a 1Hz input. The 1Hz
input is generated by a prescaler driven by an on-board
oscillator that utilizes one of four possible external crystals or
that can be driven by an external clock source. The 1Hz
trigger to the counters can also be supplied by a 50Hz or
60Hz input source that is connected to the LINE input pin.
The operation of the Real-Time Clock is controlled by the
Clock Control and Interrupt Control Registers. Both registers
are Read-Write Registers. Another register, the Status
Register, is available to indicate the operating conditions.
The Status Register is a Read only Register.
The time counters offer seconds, minutes and hours data in
12 hour or 24 hour format. An AM/PM indicator is available
that once set, toggles every 12 hours. The calendar counters
consist of day (day of week), date (day of month), month and
8
Service Time
Reset Time
MIN
MAX
MIN
MAX
MIN
MAX
-
10ms
-
8.3ms
-
7.8ms
20
40ms
16.7
33.3ms
15.6
31.3ms
The value in the 3 least significant bits of the Clock Control
Register selects one of seven possible output frequencies.
(See Clock Control Register). This squarewave signal is
available at the CLK OUT pin. When Power-Down operation
is initiated, the output is set low.
Power Control
Power control is composed of two operations, Power Sense
and Power Down/Up. Two pins are involved in power
sensing, the LINE input pin and the INT output pin. Two
additional pins are utilized during power-down/up operation.
They are the PSE (Power Supply Enable) output pin and
VSYS input pin.
FN1547.7
March 17, 2006
XTAL IN
INT
INT
XTAL OUT
VDD
0V
LINE
VDD
CPU
CDP68HC05C16B
REAL-TIME CLOCK
CDP68HC68T1
I
STATUS REGISTER
FIGURE 3. POWER-SENSING FUNCTIONAL DIAGRAM
FROM SYSTEM
POWER
TO SYSTEM
POWER CONTROL
POWER
UP
PSE
PSE
VSYS
I
INTERRUPT
CONTROL
REGISTER
CLK
OUT
OSC
RESET
CPUR
MISO
SERIAL
INTERFACE
POWER
SENSE
OR
ALARM
CIRCUIT
CPUR
PERIODIC
INTERRUPT
SIGNAL
MOSI
REAL-TIME CLOCK
CDP68HC68T1
CLK
OUT
INT
MISO
CPU
CDP68HC05C4B
FIGURE 4. POWER-DOWN FUNCTIONAL DIAGRAM
SERIAL
INTERFACE
MOSI
REAL-TIME CLOCK
CDP68HC68T1
FIGURE 5. POWER-UP FUNCTIONAL DIAGRAM (INITIATED
BY INTERRUPT SIGNAL
Power Sensing (See Figure 3)
Power Down (See Figure 4)
When Power Sensing is enabled (Bit 5 = 1 in Interrupt
Control Register), AC transitions are sensed at the LINE input
pin. Threshold detectors determine when transitions cease.
After a delay of 2.68ms to 4.64ms, plus the external input
circuit RC time constant, an interrupt is generated and a bit is
set in the Status Register. This bit can then be sampled to see
if system power has turned back on. See PIN FUNCTIONS,
LINE PIN. The power-sense circuitry operates by sensing the
level of the voltage presented at the line input pin. This voltage
is centered around VDD and as long as it is either plus or
minus a threshold (about 1V) from VDD a power-sense failure
will not be indicated. With an AC signal present, remaining in
this VDD window longer than a minimum of 2.68ms will
activate the power-sense circuit. The larger the amplitude of
the AC signal, the less time it spends in the VDD window, and
the less likely a power failure will be detected. A 60Hz, 10VP-P
sinewave voltage is an applicable signal to present at the
LINE input pin to setup the power sense function.
Power down is a processor-directed operation. A bit is set in
the Interrupt Control Register to initiate operation. 3 pins are
affected. The PSE (Power Supply Enable) output, normally
high, is placed low. The CLK OUT is placed low. The CPUR
output, connected to the processors reset input is also
placed low. In addition, the Serial Interface is disabled.
9
Power Up (See Figures 5 and 6)
Two conditions will terminate the Power-Down mode. The
first condition (See Figure 5) requires an interrupt. The
interrupt can be generated by the alarm circuit, the
programmable periodic interrupt signal, or the power sense
circuit.
The second condition that releases Power Down occurs
when the level on the VSYS pin rises about 1.0V above the
level at the VBATT input, after previously falling to the level of
VBATT (See Figure 6) in the Battery Backup Mode or VSYS
falls to logic low and returns high in the Single Supply Mode.
FN1547.7
March 17, 2006
CE
VBATT
A positive chip-enable input. A low level at this input holds
the serial interface logic in a reset state. This pin is also used
for the watchdog function.
PSE
VSYS
VSS
CPUR
The negative power-supply pin that is connected to ground.
PSE
CLK
OUT
MISO
SERIAL
INTERFACE
MOSI
REAL-TIME CLOCK
CDP68HC68T1
FIGURE 6. POWER-UP FUNCTIONAL DIAGRAM (INITIATED
BY A RISE IN VOLTAGE ON THE “VSYS” PIN)
CLK OUT
Power-supply enable output pin. This pin is used to control
power to the system. The pin is set high when:
1. VSYS rises above the VBATT voltage after VSYS was
placed low by a system failure.
2. 2An interrupt occurs.
3. A power-on reset (if VSYS is a logic high).
The PSE pin is set low by writing a high into bit 6 (powerdown bit) in the Interrupt Control Register.
Clock output pin. One of seven frequencies can be selected
(or this output can be set low) by the levels of the three
LSB’s in the Clock-Control Register. If a frequency is
selected, it will toggle with a 50% duty cycle except 2Hz in
the 50Hz time base mode. (Ex, if 1Hz is selected, the output
will be high for 500ms and low for the same period). During
power-down operation (bit 6 in Interrupt Control Register set
to “1”), the clock-output pin will be set low.
POR
CPUR
LINE
CPU reset output pin. This pin functions as an N-Channel
only, open-drain output and requires an external pull-up
resistor.
This input is used for two functions. When not used it
should be connected to VDD via a 10kΩ resistor. The first
function utilizes the input signal as the frequency source for
the timekeeping counters. This function is selected by
setting bit 6 in the Clock Control Register. The second
function enables the line input to sense a power failure.
Threshold detectors operating above and below VDD sense
an AC voltage loss. Bit 5 must be set to “1” in the Interrupt
Control Register and crystal or external clock source
operation is required. Bit 6 in the Clock Control Register
must be low to select XTAL operation.
INT
Interrupt output pin. This output is driven from a single NFET
pulldown transistor and must be tied to an external pull-up
resistor. The output is activated to a low level when:
1. Power-sense operation is selected (B5 = 1 in Interrupt
Control Register) and a power failure occurs.
2. A previously set alarm time occurs. The alarm bit in the
Status Register and interrupt-out signal are delayed
30.5µs when 32kHz operation is selected and 15.3µs for
2MHz and 7.6µs for 4MHz.
3. A previously selected periodic interrupt signal activates.
The Status Register must be read to set the Interrupt output
high after the selected periodic interval occurs. This is also
true when conditions 1 and 2 activate the interrupt. If power
down had been previously selected, the interrupt will also
reset the power-down functions.
Power-on reset. A Schmitt-trigger input that generates a
power-on internal reset signal using an external R-C
network. Both control registers and frequency dividers for
the oscillator and line input are reset. The Status Register
is reset except for the first time up bit (B4), which is set.
Single supply or battery backup operation is selected at the
end of POR.
Oscillator Circuit
The CDP68HC68T1 has an on-board 150K resistor that is
switched in series with its internal inverter when 32kHz is
selected via the Clock Control Register. Note: When first
powered up the series resistor is not part of the oscillator
circuit. (The CDP68HC68T1 sets up for a 4MHz oscillator).
SCK, MOSI, MISO
See Serial Peripheral Interface (SPI) section in this data sheet.
10
FN1547.7
March 17, 2006
R (NOTE 8)
22M
T1
XTAL
OUT
C2
CRYSTAL
5 - 30pF
XTAL
IN
C1
10 - 40pF
NOTES:
7. All frequencies recommended oscillator circuit. C1, C2 values
crystal dependent.
8. R used for 32KHz operation only. 100K - 300K range as specified
by crystal manufacturer.
FIGURE 7. OSCILLATOR CIRCUIT
LlNE-XTAL
When this bit is set high, clock operation will use the 50 or
60-cycle input present at the LINE input pin. When the bit is
low, the crystal input will generate the 1Hz time update.
XTAL Select
One of 4 possible crystals is selected by value in these two
bits:
0 = 4.194304MHz
2 = 1.048576MHz
1 = 2.097152MHz
3 = 32,768Hz
50-60Hz
50Hz is selected as the line input frequency when this bit is
set high. A low will select 60Hz. The power-sense bit in the
Interrupt Control Register must be set low for line frequency
operation.
VSYS
Clock Out
This input is connected to the system voltage. After the CPU
initiates power down by setting bit 6 in the Interrupt Control
Register to “1”, the level on this pin will terminate power
down if it rises about 1.0V above the level at the VBATT input
pin after previously falling below VBATT +1.0V. When power
down is terminated, the PSE pin will return high and the
Clock Output will be enabled. The CPUR output pin will also
return high. The logic level present at this pin at the end of
POR determines the CDP68HC68T1’s operating mode.
The three bits specify one of the 7 frequencies to be used as
the squarewave clock output:
VBATT
The oscillator power source. The positive terminal of the
battery should be connected to this pin. When the level on
the VSYS pin falls below VBATT +1.0V, the VBATT pin will be
internally connected to the VDD pin. When the voltage on
VSYS rises a threshold above (1.0V) the voltage on VBATT,
the connection from VBATT to the VDD pin is opened. When
the “LINE” input is used as the frequency source, VBATT
may be tied to VDD or VSS . The “XTAL IN” pin must be at
VSS if VBATT is at VSS . If VBATT is connected to VDD , the
“XTAL IN” pin can be tied to VSS or VDD .
XTAL IN, XTAL OUT
These pins are connected to a 32,768Hz. 1.048576MHz,
2.097152MHz or 4.194304MHz crystal. If an external clock
is used, it should be connected to “XTAL IN” with ‘XTAL
OUT” left open.
VDD
The positive power-supply pin.
Clock Control Register
START-STOP
A high written into this bit will enable the counter stages of
the clock circuitry. A low will hold all bits reset in the divider
chain from 32Hz to 1Hz. A clock out selected by bits 0, 1 and
2 will not be affected by the stop function except the 1Hz and
2Hz outputs.
11
0 = XTAL
1 = XTAL/2
2 = XTAL/4
3 = XTAL/8
4 = Disable (low output)
5 = 1Hz
6 = 2Hz
7 = 50Hz or 60Hz
XTAL Operation = 64Hz
All bits are reset by a power-on reset. Therefore, the XTAL is
selected as the clock output at this time.
Interrupt Control Register
Watchdog
When this bit is set high, the watchdog operation will be
enabled. This function requires the CPU to toggle the CE pin
periodically without a serial-transfer requirement. In the
event this does not occur, a CPU reset will be issued. Status
Register must be read before re-enabling watchdog.
Power Down
A high in this location will initiate a power down. A CPU reset
will occur, the CLK OUT and PSE output pins will be set low
and the serial interface will be disabled.
Power Sense
This bit is used to enable the line input pin to sense a power
failure. It is set high for this function. When power sense is
selected, the input to the 50Hz to 60Hz prescaler is
disconnected. Therefore, crystal operation is required when
power sense is enabled. An interrupt is generated when a
power failure is sensed and the power sense and Interrupt
True bit in the Status Register are set. When power sense is
activated, a “0” must be written to this location followed by a
“1” to re-enable power sense.
FN1547.7
March 17, 2006
Alarm
The output of the alarm comparator is enabled when this bit
is set high. When a comparison occurs between the
seconds, minutes and hours time and alarm counters, the
interrupt output is activated. When loading the time counters,
this bit should be set low to avoid a false interrupt. This is not
required when loading the alarm counters. See Pin
Functions, INT for explanation of alarm delay.
Periodic Select
The value in these 4 bits will select the frequency of the
periodic output. (See Table 2).
CLOCK CONTROL REGISTER (Write/Read) - Address 31H
D7
D6
D5
D4
D3
D2
D1
D0
START
LINE
XTAL
XTAL
50Hz
CLK OUT
CLK OUT
CLK OUT
SEL
SEL
1
0
60Hz
2
1
0
D3
D2
D1
D0
STOP
XTAL
INTERRUPT CONTROL REGISTER (Write/Read) - Address 32H
D7
D6
D5
D4
WATCHDOG
POWER
DOWN
POWER
SENSE
ALARM
PERIODIC SELECT
NOTE: All bits are reset by power-on reset.
TABLE 2. PERIODIC INTERRUPT OUTPUT
FREQUENCY TIME BASE
D0 - D3 VALUE
PERIODIC INTERRUPT
OUTPUT FREQUENCY
0
Disable
1
2048Hz
X
2
1024Hz
X
3
512Hz
X
4
256Hz
X
5
128Hz
X
6
64Hz
X
XTAL
50 or 60Hz
LINE
X
7
32Hz
X
8
16Hz
X
9
8Hz
X
10
4Hz
X
11
2Hz
X
X
12
1Hz
X
X
13
Minute
X
X
14
Hour
X
X
15
Day
X
X
12
FN1547.7
March 17, 2006
STATUS REGISTER (Read Only) - Address 30H
D7
D6
D5
D4
D3
D2
D1
D0
0
WATCHDOG
TEST
MODE
FIRST
TIME
UP
INTERRUPT
TRUE
POWER
SENSE
INTERRUPT
ALARM
INTERRUPT
CLOCK
INTERRUPT
TRUTH TABLE
SIGNAL
MODE
CE
SCK (Note 9)
MOSI
MISO
DISABLE
RESET
L
INPUT DISABLED
INPUT DISABLED
HIGH Z
WRITE
H
CPOL = 1
DATA BIT LATCH
HIGH Z
X
NEXT DATA BIT
SHIFTED OUT
(Note 10)
CPOL = 0
READ
H
CPOL = 1
CPOL = 0
NOTES:
9. When interfacing to CDP68HC05 microcontrollers, serial clock phase bit, CPHA, must be set = 1 in the microcomputer’s Control Register.
10. MISO remains at a high Z until 8-bits of data are ready to be shifted out during a READ. It remains at a high Z during the entire WRITE cycle.
WATCHDOG
Pin Signal Description
If this bit is set high, the watchdog circuit has detected a
CPU failure.
SCK (Serial Clock Input, Note 11)
TEST MODE
When this bit is set high, the device is in the TEST MODE.
FIRST-TIME UP
Power-on reset sets this bit high. This signifies that data in
the RAM and Clock is not valid and should be initialized.
INTERRUPT TRUE
A high in this bit signifies that one of the three interrupts
(Power Sense, Alarm, and Clock) is valid.
POWER-SENSE INTERRUPT
This input causes serial data to be latched from the MOSI
input and shifted out on the MISO output.
MOSI (Master Out/Slave In, Note 11)
Data bytes are shifted in at this pin, most significant bit
(MSB) first.
MISO (Master In/Slave Out)
Data bytes are shifted out at this pin, most significant bit
(MSB) first.
CE (Chip Enable, Note 12)
This bit set high signifies that the power-sense circuit has
generated an interrupt.
A positive chip-enable input. A low level at this input holds
the serial interface logic in a reset state, and disables the
output driver at the MISO pin.
ALARM INTERRUPT
NOTES:
When the seconds, minutes and hours time and alarm
counter are equal, this bit will be set high. Status Register
must be read before loading Interrupt Control Register for
valid alarm indication after alarm activates.
11. These inputs will retain their previous state if the line driving them
goes into a High-Z state.
12. The CE input has as internal pull down device, if the input is in a
low state before going to High Z, the input can be left in a High Z.
CLOCK INTERRUPT
A periodic interrupt will set this bit high.
All bits are reset by a power-on reset except the “FIRSTTIME UP” which is set. All bits except the power-sense bit
are reset after a read of this register.
13
FN1547.7
March 17, 2006
Functional Description
Address And Data Format
The Serial Peripheral Interface (SPI) utilized by the
CDP68HC68T1 is a serial synchronous bus for address and
data transfers. The clock, which is generated by the
microcomputer is active only during address and data
transfers. In systems using the CDP68HC05C4 or
CDP68HC05D2, the inactive clock polarity is determined by
the CPOL bit in the microcomputer’s Control Register. A
unique feature of the CDP68HC68T1 is that it automatically
determines the level of the inactive clock by sampling SCK
when CE becomes active (see Figure 8). Input data (MOSI)
is latched internally on the internal strobe edge and output
data (MISO) is shifted out on the shift edge, as defined by
Figure 8. There is one clock for each data bit transferred
(address, as well as data bits are transferred in groups of 8).
There are three types of serial transfer:
1. Address Control - Figure 9.
2. READ or WRITE Data - Figure 10.
3. Watchdog Reset (actually a non-transfer) Figure 11.
The Address/Control and Data bytes are shifted MSB first,
Into the serial data input (MOSI) and out of the serial data
output (MISO).
Any transfer of data requires an Address/Control byte to
specify a Write or Read operation and to select a Clock or
RAM location, followed by one or more bytes of data.
Data is transferred out of MISO for a Read and into MOSI for
a Write operation.
Address/Control Byte - Figure 9
INTERNAL
SHIFT STROBE
CE
It is always the first byte received after CE goes true. To
transmit a new address, CE must first go false and then true
again. Bit 5 is used to select between Clock and RAM
locations.
CPOL = 1
SCK
CE
SHIFT
CPOL = 0
INTERNAL
STROBE
SCK
MOSI
MSB
MSB -1
NOTE: “CPOL” is a bit that is set in the microcomputer’s Control
Register.
FIGURE 8. SERIAL RAM CLOCK (SCK) AS A FUNCTION OF
MCU CLOCK POLARITY (CPOL)
BIT
7
6
5
4
3
2
1
0
W/R
0
CLK RAM
A4
A3
A2
A1
A0
04
A0-A4
5
CLK RAM
6
0
7
W/R
Selects 5-Bit HEX Address of RAM or specifies Clock Register. Most Significant Address
Bit. If equal to “1”, A0 through A4 selects a Clock Register. If equal to “0”, A0 through A4
selects one of 32 RAM locations. Must be set to ”0” when not in Test Mode 7W/R W/R = “1”
initiates one or more WRITE cycles.W/R = “0”, initiates one or more READ cycles.
CE
SCK (NOTE)
MOSI
W/R
0
CLOCK
RAM
A4
A3
A2
A1
A0
NOTE: SCK can be either polarity.
FIGURE 9. ADDRESS/CONTROL BYTE-TRANSFER WAVEFORMS
14
FN1547.7
March 17, 2006
Read/Write Data (See Figure 10)
Read/Write data follows the Address/Control byte.
BIT
7
6
5
4
3
2
1
0
D7
D6
D5
D4
D3
D2
D1
D0
CE
SCK (NOTE)
MOSI
D7
D6
D5
D4
D3
D2
D1
D0
MISO
D7
D6
D5
D4
D3
D2
D1
D0
NOTE: SCK can be either polarity.
FIGURE 10. READ/WRITE DATA TRANSFER WAVEFORMS
Watchdog Reset (See Figure 11)
Address And Data
When watchdog operation is selected, CE must be toggled
periodically or a CPU reset will be outputted.
Data transfers can occur one byte at a time (Figure 12) or in
a multibyte burst mode (Figure 13). After the Real-Time
Clock enabled, an Address/Control word is sent to set the
CLOCK or RAM and select the type of operation (i.e., Read
or Write). For a single-byte Read or Write, one byte is
transferred to or from the Clock Register or RAM location
specified in the Address/Control byte and the Real-Time
Clock is then disabled. Write cycle causes the latched Clock
Register or RAM address to automatically increment.
Incrementing continues after each transfer until the device is
disabled. After incrementing to 1FH the address will “wrap”
to 00H and continue. Therefore, when the RAM is selected
the address will “wrap” to 00H and when the clock is
selected the address will “wrap” 20H.
SERVICE
TIME
SERVICE
TIME
CE
SCK
CPUR
FIGURE 11. WATCHDOG OPERATION WAVEFORMS
15
FN1547.7
March 17, 2006
CE
SCK
WRITE
MOSI
ADDRESS BYTE
MOSI
WRITE DATA
ADDRESS BYTE
READ
READ DATA
MISO
FIGURE 12. SINGLE-BYTE TRANSFER WAVEFORMS
CE
SCK
WRITE
MOSI
ADDRESS BYTE
MOSI
ADDRESS BYTE
DATA BYTE
DATA BYTE
DATA BYTE
READ
MISO
DATA BYTE
DATA BYTE
DATA BYTE
DATA BYTE
W/R ADDRESS
DATA BYTE +1
DATA BYTE + (n-1)
FIGURE 13. MULTIPLE-BYTE TRANSFER WAVEFORMS
16
FN1547.7
March 17, 2006
Dynamic Electrical Specifications
Bus Timing VDD ±10%, VSS = 0VDC, TA = 40°C to 85°C
LIMITS (ALL TYPES)
VDD = 3.3V
IDENT. NO
PARAMETER
VDD = 5V
MIN
MAX
MIN
MAX
UNITS
1
Chip Enable Setup TimetEVCV
200
-
100
-
ns
2
Chip Enable After Clock Hold TimetCVEX
250
-
125
-
ns
3
Clock Width HightWH
400
-
200
-
ns
4
Clock Width LowtWL
400
-
200
-
ns
5
Data In to Clock Setup TimetDVCV
200
-
100
-
ns
7
Clock to Data Propagation DelaytCVDV
-
200
-
100
ns
8
Chip Disable to Output High ZtEXQZ
-
200
-
100
ns
11
Output Rise Timetr
-
200
-
100
ns
12
Output Fall Timetf
-
200
-
100
ns
A
Data in After Clock Hold TimetCVDX
200
-
100
-
ns
B
Clock to Data Out ActivetCVQX
-
200
-
100
ns
C
Clock Recovery TimetREC
200
-
200
-
ns
17
FN1547.7
March 17, 2006
Timing Diagrams
5
MOSI
A
A0
A6
W/R
5
D7O
D6O
D1N
DON
CE
I
C
2
SCK
4
3
FIGURE 14. WRITE-CYCLE TIMING WAVEFORMS
5
A
W/R
MOSI
A6
A0
8
11 12
D7O
MISO
D6O
DIN
DON
7
8
CE
I
C
2
SCK
4
3
FIGURE 15. READ-CYCLE TIMING WAVEFORMS
System Diagrams
AC
LINE
BRIDGE
REGULATOR
VDD
VDD POR
IRQ
INT
VSYS
LINE
CDP68HC68T1
VBATT
XTAL IN
CPUR
CE
SCK
MOSI
MISO
VDD
CDP68HC05C8B
RESET
PORT
SCK
MOSI
MISO
NOTE: Example of a system in which power is always on. Clock circuit driven by line input frequency.
FIGURE 16. POWER-ON ALWAYS SYSTEM DIAGRAM
18
FN1547.7
March 17, 2006
System Diagrams
(Continued)
BRIDGE
GENERATOR
AC
LINE
VBATT
INT
CDP68HC68T1
LINE
VDD
VDD
POR
VSYS
VDD
CPUR
CLK OUT
CE
MISO
VDD
IRQ
CDP68HC05C8B
RESET
OSC 1
PORT (e.g., PCO)
MISO
MOSI
MOSI
SCK
SCK
NOTE: Example of a system in which the power is controlled by an external source. The LINE input pin can sense when the switch opens by use
of the POWER-SENSE INTERRUPT. The CDP68HC68T1 crystal drives the clock input to the CPU using the CLK OUT pin. On power down when
VSYS < VBATT + 1.0V. VBATT will power the CDP68HC68T1. A threshold detect activates a P-Channel switch, connecting VBATT to VDD . VBATT
always supplies power to the oscillator, keeping voltage frequency variation to a minimum.
FIGURE 17. EXTERNALLY CONTROLLED POWER SYSTEM DIAGRAM
A Procedure for Power-Down Operation might consist of the following:
1. Set power sense operation by writing bit 5 high in the Interrupt Control Register.
2. When an interrupt occurs, the CPU reads the Status Register to determine the interrupt source.
3. Sensing a power failure, the CPU does the necessary housekeeping to prepare for shutdown.
4. The CPU reads the Status Register again after several milliseconds to determine validity of power failure.
5. The CPU sets power-down bit 6 and disables all interrupts in the Interrupt Control Register when power down is verified.
This causes the CPU reset and clock out to be held low and disconnects the serial interface.
6. When power returns and VSYS rises above VBATT, power down is terminated. The CPU reset is released and serial
communication is established.
19
FN1547.7
March 17, 2006
System Diagrams
AC
LINE
(Continued)
(EPS)
ENABLED
POWER
SUPPLY
REGULATOR
NC
0.1
R
CHARGE
0.047
100k
POR
VBATT
VDD
VSYS
VDD
1k
22M
PSE
XTAL
RESET
CPUR
VDD
LINE
CDP68HC05C4B
IRQ
INT
CLK
OUT
20k
OSC1
CE
RTC
VDD
VSS
SPI
PORT
3
SPI
VSS
FIGURE 18. EXAMPLE OF A SYSTEM WITH A BATTERY BACKUP
20
FN1547.7
March 17, 2006
System Diagrams
(Continued)
ENABLED POWER
CLOCK BUTTON
IGNITION
5V
REG
12V
+
-
LINE
VBATT
VDD
VSYS
VDD
POR
PORT
PSE
XTAL
2MHz
CPUR
RESET
T1
CDP68HC05C4B
CLK OUT
OSC1
INT
SPI
VSS
IRQ
3
CE
SPI
PORT
VSS
Example of an automotive system. The VSYS and LINE inputs can be used to sense the ignition turning on and off. An
external switch is included to activate the system without turning on the ignition. Also, the CMOS CPU is not powered down
with the system VDD , but is held in a low power reset mode during power down. When restoring power the CDP68HC68T1
will enable the CLK OUT pin and set the PSE and CPUR high.
Important Application Note: Those units with a code of 6PG have delayed alarm interrupts of 8.3ms regardless of
CDP68HC68T1’s operating frequency. (See Pin Functions, INT.) In addition, reading the Status Register before delayed
alarm activates will disable alarm signal.
FIGURE 19. AUTOMOTIVE SYSTEM DIAGRAM
21
FN1547.7
March 17, 2006
Dual-In-Line Plastic Packages (PDIP)
N
E16.3 (JEDEC MS-001-BB ISSUE D)
E1
INDEX
AREA
1 2 3
16 LEAD DUAL-IN-LINE PLASTIC PACKAGE
N/2
INCHES
-B-
SYMBOL
-AE
D
BASE
PLANE
-C-
A2
SEATING
PLANE
A
L
D1
e
B1
D1
eA
A1
eC
B
0.010 (0.25) M
C
L
C A B S
C
eB
NOTES:
1. Controlling Dimensions: INCH. In case of conflict between English and
Metric dimensions, the inch dimensions control.
MILLIMETERS
MIN
MAX
MIN
MAX
NOTES
A
-
0.210
-
5.33
4
A1
0.015
-
0.39
-
4
A2
0.115
0.195
2.93
4.95
-
B
0.014
0.022
0.356
0.558
-
B1
0.045
0.070
1.15
1.77
8, 10
C
0.008
0.014
0.204
0.355
-
D
0.735
0.775
18.66
19.68
5
D1
0.005
-
0.13
-
5
E
0.300
0.325
7.62
8.25
6
E1
0.240
0.280
6.10
7.11
5
e
0.100 BSC
2.54 BSC
-
3. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of
Publication No. 95.
eA
0.300 BSC
7.62 BSC
6
eB
-
0.430
-
10.92
7
4. Dimensions A, A1 and L are measured with the package seated in JEDEC seating plane gauge GS-3.
L
0.115
0.150
2.93
3.81
4
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
5. D, D1, and E1 dimensions do not include mold flash or protrusions.
Mold flash or protrusions shall not exceed 0.010 inch (0.25mm).
6. E and eA are measured with the leads constrained to be perpendicular to datum -C- .
N
16
16
9
Rev. 0 12/93
7. eB and eC are measured at the lead tips with the leads unconstrained.
eC must be zero or greater.
8. B1 maximum dimensions do not include dambar protrusions. Dambar
protrusions shall not exceed 0.010 inch (0.25mm).
9. N is the maximum number of terminal positions.
10. Corner leads (1, N, N/2 and N/2 + 1) for E8.3, E16.3, E18.3, E28.3,
E42.6 will have a B1 dimension of 0.030 - 0.045 inch (0.76 - 1.14mm).
22
FN1547.7
March 17, 2006
Small Outline Plastic Packages (SOIC)
M16.3 (JEDEC MS-013-AA ISSUE C)
N
INDEX
AREA
16 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE
H
0.25(0.010) M
B M
INCHES
E
-B-
1
2
3
L
SEATING PLANE
-A-
A
D
h x 45°
-C-
e
A1
B
0.25(0.010) M
C
0.10(0.004)
C A M
SYMBOL
MIN
MAX
MIN
MAX
NOTES
A
0.0926
0.1043
2.35
2.65
-
A1
0.0040
0.0118
0.10
0.30
-
B
0.013
0.0200
0.33
0.51
9
C
0.0091
0.0125
0.23
0.32
-
D
0.3977
0.4133
10.10
10.50
3
E
0.2914
0.2992
7.40
7.60
4
e
α
B S
1. Symbols are defined in the “MO Series Symbol List” in Section 2.2 of
Publication Number 95.
0.050 BSC
1.27 BSC
-
H
0.394
0.419
10.00
10.65
-
h
0.010
0.029
0.25
0.75
5
L
0.016
0.050
0.40
1.27
6
N
α
NOTES:
MILLIMETERS
16
0°
16
8°
0°
7
8°
Rev. 1 6/05
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006
inch) per side.
4. Dimension “E” does not include interlead flash or protrusions. Interlead
flash and protrusions shall not exceed 0.25mm (0.010 inch) per side.
5. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater above
the seating plane, shall not exceed a maximum value of 0.61mm (0.024
inch)
10. Controlling dimension: MILLIMETER. Converted inch dimensions are
not necessarily exact.
23
FN1547.7
March 17, 2006
Small Outline Plastic Packages (SOIC)
M20.3 (JEDEC MS-013-AC ISSUE C)
20 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE
N
INDEX
AREA
H
0.25(0.010) M
B M
INCHES
E
-B-
1
2
3
L
SEATING PLANE
-A-
A
D
h x 45°
-C-
e
A1
B
C
0.10(0.004)
0.25(0.010) M
C A M
SYMBOL
MIN
MAX
MIN
MAX
NOTES
A
0.0926
0.1043
2.35
2.65
-
A1
0.0040
0.0118
0.10
0.30
-
B
0.014
0.019
0.35
0.49
9
C
0.0091
0.0125
0.23
0.32
-
D
0.4961
0.5118
12.60
13.00
3
E
0.2914
0.2992
7.40
7.60
4
e
α
B S
0.050 BSC
1.27 BSC
-
H
0.394
0.419
10.00
10.65
-
h
0.010
0.029
0.25
0.75
5
L
0.016
0.050
0.40
1.27
6
N
α
NOTES:
MILLIMETERS
20
0°
20
8°
0°
7
8°
1. Symbols are defined in the “MO Series Symbol List” in Section
2.2 of Publication Number 95.
Rev. 2 6/05
2. Dimensioning and tolerancing per ANSI Y14.5M-1982.
3. Dimension “D” does not include mold flash, protrusions or gate
burrs. Mold flash, protrusion and gate burrs shall not exceed
0.15mm (0.006 inch) per side.
4. Dimension “E” does not include interlead flash or protrusions.
Interlead flash and protrusions shall not exceed 0.25mm (0.010
inch) per side.
5. The chamfer on the body is optional. If it is not present, a visual
index feature must be located within the crosshatched area.
6. “L” is the length of terminal for soldering to a substrate.
7. “N” is the number of terminal positions.
8. Terminal numbers are shown for reference only.
9. The lead width “B”, as measured 0.36mm (0.014 inch) or greater
above the seating plane, shall not exceed a maximum value of
0.61mm (0.024 inch)
10. Controlling dimension: MILLIMETER. Converted inch
dimensions are not necessarily exact.
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24
FN1547.7
March 17, 2006