Intersil CDP68HC68T1M2Z Cmos serial real-time clock with ram and power sense/control Datasheet

CDP68HC68T1
®
Data Sheet
October 29, 2007
FN1547.8
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 to 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:
• SPI (Serial Peripheral Interface)
• 32 Wordx8-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 Available (RoHS Compliant)
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.
Pinouts
CDP68HC68T1
(20 LD SOIC)
TOP VIEW
CDP68HC68T1
(16 LD PDIP, SOIC)
TOP VIEW
CLKOUT
1
16 VDD
CPUR
2
15 XTAL OUT
INT
3
14 XTAL IN
CLK OUT
1
20 VDD
CPUR
2
19 XTAL OUT
INT
3
18 XTAL IN
SCK
4
13 VBATT
NC
4
17 NC
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 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Harris Corporation 1997. Copyright Intersil Americas Inc. 2001, 2004-2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
CDP68HC68T1
Ordering Information
PART NUMBER
PART MARKING
TEMP RANGE (°C)
PACKAGE
PKG DWG. #
CDP68HC68T1E
CDP68HC68T1E
-40 to +85
16 Ld PDIP
E16.3
CDP68HC68T1EZ (Note)
CDP68HC68T1EZ
-40 to +85
16 Ld PDIP**
(Pb-free)
E16.3
CDP68HC68T1M*
68HC68T1M
-40 to +85
20 Ld SOIC
Tape and Reel
M20.3
CDP68HC68T1MZ* (Note)
68HC68T1MZ
-40 to +85
20 Ld SOIC (Pb-free)
Tape and Reel
M20.3
CDP68HC68T1M2*
HC68T1M2
-40 to +85
16 Ld SOIC
Tape and Reel
M16.3
CDP68HC68T1M2Z* (Note)
HC68T1M2Z
-40 to +85
16 Ld SOIC (Pb-free)
Tape and Reel
M16.3
*Add “96” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
**Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and 100%
matte tin plate PLUS ANNEAL - e3 termination finish, which is 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
FN1547.8
October 29, 2007
CDP68HC68T1
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)
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
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
*Pb-free PDIPs can be used for through hole wave solder processing
only. They are not intended for use in Reflow solder processing
applications.
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 Voltage
Input High . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(0.7 x VDD) to VDD
Input Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V to (0.3 x VDD)
Serial Clock Frequency (fSCK). . . . . . . . . . . . . . . . . . +3.0V to +6.0V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
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%, Unless Otherwise Specified.
CDP68HC68T1
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
(Note 2)
MAX
UNITS
-
1
10
µA
Quiescent Device Current
IDD
Output Voltage High Level
VOH
IOH = -1.6mA, VDD = 4.5V
3.7
-
-
V
Output Voltage Low Level
VOL
IOL = 1.6mA, VDD = 4.5V
-
-
0.4
V
Output Voltage High Level
VOH
IOH ≤ 10µA, VDD = 4.5V
4.4
-
-
V
Output Voltage Low Level
VOL
IOL ≤ 10µA, VDD = 4.5V
-
-
0.1
V
IIN
-
-
±1
µA
IOUT
-
-
±10
µA
32kHz
-
0.08
-
mA
1MHz
-
0.5
-
mA
2MHz
-
0.7
-
mA
4MHz
-
1
-
mA
32kHz
-
0.02
0.024
mA
1MHz
-
0.1
0.12
mA
2MHz
-
0.2
0.24
mA
4MHz
-
0.4
0.5
mA
32kHz
-
20
-
µA
1MHz
-
200
-
µA
2MHz
-
300
-
µA
4MHz
-
500
-
µA
Input Leakage Current
Three-State Output Leakage Current
Operating Current (Note 3)
(ID + IB) VDD = VB = 5V
Crystal Operation
XTAL IN Clock (Squarewave) (Note 3)
(ID + IB) VDD = VS = 5V
IB
Standby Current (Note 3)
VS = 3V
Crystal Operation
3
FN1547.8
October 29, 2007
CDP68HC68T1
Static Electrical Specifications At TA = -40°C to +85°C, VDD = VBATT = 5V ±5%, Unless Otherwise Specified. (Continued)
CDP68HC68T1
PARAMETER
SYMBOL
TEST CONDITIONS
Operating Current (Note 3)
VDD = 5V, VB = 3V
Crystal Operation
IB
Standby Current (Note 3)
VB = 2.2V
Crystal Operation
Input Capacitance
CIN
Maximum Rise and Fall Times
(Except XTAL Input and POR Pin 10)
tr, tf
MIN
TYP
(Note 2)
MAX
UNITS
ID
IB
-
mA
32kHz
-
0.025
0.015
-
mA
1MHz
-
0.08
0.15
-
mA
2MHz
-
0.15
0.25
-
mA
4MHz
-
0.3
0.4
-
mA
32kHz
-
10
-
µA
VIN = 0, TA = +25°C
-
-
2
pF
-
-
2
µs
-
-
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
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.
Dynamic Electrical Specifications
Bus Timing VDD ±10%, VSS = 0VDC, TA = -40°C to +85°C
LIMITS (ALL TYPES)
IDENTIFICATION
NUMBER
VDD = 3.3V
PARAMETER
SYMBOL
VDD = 5V
MIN
MAX
MIN
MAX
UNITS
1
Chip Enable Setup Time
tEVCV
200
-
100
-
ns
2
Chip Enable After Clock Hold Time
tCVEX
250
-
125
-
ns
3
Clock Width High
tWH
400
-
200
-
ns
4
Clock Width Low
tWL
400
-
200
-
ns
5
Data In to Clock Setup Time
tDVCV
200
-
100
-
ns
7
Clock to Data Propagation Delay
tCVDV
-
200
-
100
ns
8
Chip Disable to Output High Z
tEXQZ
-
200
-
100
ns
11
Output Rise Time
tr
-
200
-
100
ns
12
Output Fall Time
tf
-
200
-
100
ns
A
Data in After Clock Hold Time
tCVDX
200
-
100
-
ns
B
Clock to Data Out Active
tCVQX
-
200
-
100
ns
C
Clock Recovery Time
tREC
200
-
200
-
ns
4
FN1547.8
October 29, 2007
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
CLOCK
SELECT
CLOCK
CONTROL
REGISTER
INT
VSS
INTERRUPT
CONTROL
REGISTER
YEAR
COMPARATOR
SECOND
LATCH
MINUTE
LATCH
HOUR
LATCH
LINE
VSYS
POR
POWER
SENSE
CONTROL
INT STATUS
REGISTER
PSE
32x8
RAM
CPUR
SCK
MISO
MOSI
SERIAL
INTERFACE
FN1547.8
October 29, 2007
FIGURE 1. REAL TIME CLOCK FUNCTIONAL DIAGRAM
CDP68HC68T1
CLOCK
AND
INT
LOGIC
VDD
8-BIT DATA BUS
CDP68HC68T1
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
BCD DATE EXAMPLE
(Note 4)
Seconds
0 to 59
00 to 59
18
21
Minutes
0 to 59
00 to 59
49
22
Hours
12 Hour Mode
(Note 5)
1 to 12
81 to 92 (AM)
A1 to B2 (PM)
A3
Hours
24 Hour Mode
0 to 23
00 to 23
15
23
Day of the Week
(Sunday = 1)
1 to 7
01 to 07
03
24
Day of the Month
(Date)
1 to 31
01 to 31
29
25
Month
Jan = 1, Dec = 12
1 to 12
01 to 12
10
26
Years
0 to 99
00 to 99
85
28
Alarm Seconds
0 to 59
00 to 59
18
29
Alarm Minutes
0 to 59
00 to 59
49
2A
Alarm Hours (Note 6)
12 Hour Mode
1 to 12
01 to 12 (AM)
21 to 32 (PM)
23
Alarm Hours
24 Hour Mode
0 to 23
00 to 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 PM and ‘0” for AM in 12 hour mode.
6. Alarm hours. Data Bit D5 is “1” for PM and “0” for AM in 12 hour mode. Data Bits D7 and D6 are DON’T CARE.
6
FN1547.8
October 29, 2007
CDP68HC68T1
Programmers Model - Clock Registers
HEX ADDRESS
WRITE/READ REGISTERS
NAME
DB7
DB0
TENS 0 TO 5
UNITS 0 TO 9
SECONDS (00 TO 59)
TENS 0 TO 5
UNITS 0 TO 9
MINUTES (00 TO 59)
UNITS 0 TO 9
DB7, 1 = 12 HR, 0 = 24 HR
DB = 1 PM, 0 = AM
HOURS (01 TO 12 OR 00 TO 23
20
21
12
HR
24
22
X
23
PM/AM
TENS 0 TO 2
X
X
X
X
X
UNITS 1 TO 7
DAY OF WK (01 TO 07) SUNDAY = 1
DATE
DAY OF MONTH
01 TO 28
29
30
31
TENS 0 TO 3
UNITS 0 TO 9
TENS 0 TO 1
UNITS 0 TO 9
MONTH (01 TO 12) JAN = 1
DEC = 12
TENS 0 TO 9
UNITS 0 TO 9
YEARS (00 TO 99)
24
25
26
7
6
5
4
3
2
1
0
CONTROL
7
6
5
4
3
2
1
0
INTERRUPT
31
32
WRITE ONLY REGISTERS
28
29
X
2A
TENS 0 TO 5
UNITS 0 TO 9
ALARM SECONDS (00 TO 59)
TENS 0 TO 5
UNITS 0 TO 9
ALARM MINUTES (00 TO 59)
UNITS 0 TO 9
ALARM HOURS (01 TO 12 OR 00 TO 23)
PLUS AM/PM IN 12 HR MODE
PM = 1, AM = 0
X
PM/AM
TENS 0 TO 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
FN1547.8
October 29, 2007
CDP68HC68T1
Functional Description
The SPI real-time clock consists of a clock/calendar and a
32x8 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 seven
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/power-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 power-down instruction,
VSYS brought to a logic low and then to a logic high will reenable 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 seven time counters are accessed serially at
addresses 20H through 26H. See Table 1.
RAM
The real-time clock also has a static 32x8 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 "Functional Description", INT Pin on
page 10). 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 in
Table 2.
TABLE 2.
Battery Backup Mode
50Hz
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 "Functional Description",
VBATT for Battery Backup Operation on page 11.)
Clock/Calendar (See Figures 1 and 2)
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 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
60Hz
XTAL
MIN
MAX
MIN
MAX
MIN
MAX
-
10ms
-
8.3ms
-
7.8ms
20
40ms
16.7
33.3ms
15.6
31.3ms
Clock Out
The value in the three least significant bits of the Clock Control
Register selects one of seven possible output frequencies.
(See “Clock Control Register” on page 11). This squarewave
signal is available at the CLK OUT pin. When power-down
operation is initiated, the output is set low.
Control Registers and Status Registers
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.
Power Control
Power control is composed of two operations, Power Sense
and Power-Down/Power-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/power-up
operation. They are the PSE (Power Supply Enable) output
pin and VSYS input pin.
FN1547.8
October 29, 2007
CDP68HC68T1
XTAL IN
INT
INT
XTAL OUT
VDD
0V
LINE
CPU
CDP68HC05C16B
VDD
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
SERIAL
INTERFACE
MOSI
REAL-TIME CLOCK
CDP68HC68T1
FIGURE 4. POWER-DOWN FUNCTIONAL DIAGRAM
Power Sensing (See Figure 3)
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 "Functional
Description", Line pin on page 10. 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
9
FIGURE 5. POWER-UP FUNCTIONAL DIAGRAM (INITIATED
BY INTERRUPT SIGNAL
signal to present at the LINE input pin to setup the power
sense function.
Power-Down (See Figure 4)
Power-down is a processor-directed operation. A bit is set in
the Interrupt Control Register to initiate operation. Three 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.
Power-Up (See Figures 5 and 6)
Two conditions will terminate the Power-Down mode.
1. 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.
FN1547.8
October 29, 2007
CDP68HC68T1
2. 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.
SCK, MOSI, MISO
See “Serial Peripheral Interface (SPI)” on page 8.
CE
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.
VSS
VBATT
The negative power-supply pin that is connected to ground.
PSE
VSYS
PSE
CPUR
Power-supply enable output pin. This pin is used to control
power to the system. The pin is set high when:
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
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. (e.g. 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 is
set to “1”), the clock-output pin will be set low.
CPUR
CPU reset output pin. This pin functions as an N-Channel
only, open-drain output and requires an external pull-up
resistor.
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.
1. VSYS rises above the VBATT voltage after VSYS was
placed low by a system failure.
2. An 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
(power-down bit) in the Interrupt Control Register.
POR
Power-on reset. A Schmitt-trigger input that generates a
power-on internal reset signal using an external RC
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.
LINE
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.
Oscillator Circuit
The CDP68HC68T1 has an on-board 150kΩ 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).
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.
10
FN1547.8
October 29, 2007
CDP68HC68T1
R (NOTE 8)
22M
T1
XTAL
OUT
CRYSTAL
5pF TO 30pF
XTAL
IN
C1
10pF TO 40pF
C2
NOTES:
7. All frequencies recommended oscillator circuit. C1, C2 values
crystal dependent.
8. R is used for 32KHz operation only. 100k to 300k range as
specified by crystal manufacturer.
FIGURE 7. OSCILLATOR CIRCUIT
VSYS
Line-XTAL
When this bit is set high, clock operation will use the
50-cycle 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
50Hz to 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.
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.
Clock Out
VBATT
All bits are reset by a power-on reset. Therefore, the XTAL is
selected as the clock output at this time.
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 Bit 0, Bit 1
and Bit 2 will not be affected by the stop function except the
1Hz and 2Hz outputs.
11
The three bits specify one of the 7 frequencies to be used as
the squarewave clock output:
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
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.
FN1547.8
October 29, 2007
CDP68HC68T1
Alarm
Periodic Select
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 "Functional
Description", INT for explanation of alarm delay on page 10.
The value in these 4 bits will select the frequency of the
periodic output. (See Table 3).
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 3. 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
50Hz 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
FN1547.8
October 29, 2007
CDP68HC68T1
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
FN1547.8
October 29, 2007
CDP68HC68T1
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 - (see 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
INTERNAL
STROBE
CPOL = 0
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 through 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
FN1547.8
October 29, 2007
CDP68HC68T1
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
FN1547.8
October 29, 2007
CDP68HC68T1
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
FN1547.8
October 29, 2007
CDP68HC68T1
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
CPUR
CE
SCK
MOSI
MISO
VDD
CDP68HC05C8B
RESET
PORT
SCK
MOSI
MISO
XTAL IN
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
17
FN1547.8
October 29, 2007
CDP68HC68T1
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.
18
FN1547.8
October 29, 2007
CDP68HC68T1
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
PORT
SPI
SPI
3
VSS
FIGURE 18. EXAMPLE OF A SYSTEM WITH A BATTERY BACKUP
19
FN1547.8
October 29, 2007
CDP68HC68T1
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 "Functional Description", INT on page 10.) In addition, reading the Status
Register before delayed alarm activates will disable alarm signal.
FIGURE 19. AUTOMOTIVE SYSTEM DIAGRAM
20
FN1547.8
October 29, 2007
CDP68HC68T1
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-
SEATING
PLANE
A2
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).
21
FN1547.8
October 29, 2007
CDP68HC68T1
Small Outline Plastic Packages (SOIC)
M16.3 (JEDEC MS-013-AA ISSUE C)
N
16 LEAD WIDE BODY SMALL OUTLINE PLASTIC PACKAGE
INDEX
AREA
H
0.25(0.010) M
B M
INCHES
E
-B1
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.
22
FN1547.8
October 29, 2007
CDP68HC68T1
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
MILLIMETERS
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
-B1
2
3
L
SEATING PLANE
-A-
A
D
h x 45°
-C-
e
α
e
A1
B
C
0.10(0.004)
0.25(0.010) M
C A M
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
20
0°
20
8°
0°
7
8°
NOTES:
Rev. 2 6/05
1. Symbols are defined in the “MO Series Symbol List” in Section
2.2 of Publication Number 95.
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.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
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23
FN1547.8
October 29, 2007