ML2036CP View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
ML2036CP
Fairchild Semiconductor
ML2036CP Datasheet PDF : 12 Pages
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ML2036
PRODUCT SPECIFICATION
The crystal must have the following characteristics:
1. Parallel resonant type
2. Frequency: 3MHz to 12.4MHz
3. Maximum equivalent series resistance of 15Ω at a drive
levels of 1µW to 200µW, and 30Ω at drive levels of
10nW to 1µW
4. Typical load capacitance: 18pF
5. Maximum case capacitance: 7pF
The frequency of oscillation will be a function of the crystal
parameters and PC board capacitance. Crystals that meet
these requirements at 12.352000MHz are M-tron 3709-010
12.352 for 0°C to 70°C and 3709-020 12.352 for -40°C to
85°C operation.
The ML2036 has two clock outputs that can be used to drive
other external devices. The CLK OUT 1 output is a buffered
output from the oscillator divided by 2. The CLK OUT 2
output is a buffered output from the oscillator divided by 8.
Serial Digital Interface
The digital interface consists of a shift register and data
latch. The serial 16-bit data word on SID is clocked into a
16-bit shift register on rising edges of the serial shift clock,
SCK. The LSB should be shifted in first and the MSB last as
shown in Figure 4. The data that has been shifted into the
shift register is loaded into a 16-bit data latch on the falling
edge of LATI. To insure that true data is loaded into the data
latch from the shift register, LATI falling edge should occur
when SCK is low, as shown in figure 1. LATI should be low
while shifting data into the shift register to avoid inadvert-
ently entering the power down mode. Note that all data is
entered and latched on the edges, not levels, of SCK and
LATI.
Inhibit and Power Down Modes
The ML2036 has an inhibit mode and a power down mode
which are controlled by the three-level PDN–INH input as
described in Table 1. If a logic “1”, (VI3) is applied to the
PDN–INH pin, the power down mode is entered by entering
all zeros in the shift register and applying a logic “1” to LATI
and holding it high. A zero data detect circuit detects when
all bits in the shift register are zeros. In this state, the power
consumption is reduced to 11.5mW max, and VOUT goes to
0V as shown in Figure 6 and appears as 10kΩ to AGND.
CLK IN can be left active or removed during power down
mode. Also, the ML2036 can be placed in the power down
mode by applying a logic “0” to the PDN–INH pin, regard-
less of the contents of the shift register and the state of LATI.
If VSS to VSS + 0.5V (VI2) is applied to the PDN–INH pin,
the inhibit mode is entered by shifting all zeros into the shift
register and applying a logic “1” to the LATI pin. Once the
inhibit mode is entered VOUT will complete the last half
cycle of the sinewave and then be held at approximately
VOS, such that no voltage step occurs, as shown in Figure 6.
Power Supplies
The analog circuits in ML2036 are powered from VCC to
VSS and are referenced to AGND. The digital circuits in the
device are powered from VCC to DGND. It is recommended
that AGND and DGND be connected together close to the
device, and have a good connection back to the power
source.
It is recommended that the power supplies to the device
should be bypassed by placing decoupling capacitors from
VCC to AGND and VSS to AGND as physically close to the
device as possible.
8
REV. 1.0.2 7/26/01
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