Mitsubishi M66235FP Datasheet
MITSUBISHI 〈DIGITAL ASSP〉
MITSUBISHI 〈DIGITAL ASSP〉
DESCRIPTION
M66235 is produced using the silicon gate CMOS process. It
is able to output clock input signal in sync with optional external trigger input signal.
It features excellent synchronizing precision (jitter) over a
wide frequency band range.
FEATURES
• 5V single power supply (5V ±5%)
• Frequency band: 25 ~ 52MHz
• Synchronizing precision (jitter): ±3ns
• Output types
(1) Output of the same frequency as input clock, and its in-
version
(2) 1/2 divider clock output and its inversion
(3) One-shot pulse output
(4) Continuous clock output
• Noise in the positive direction to trigger input is removed by
built-in noise killer circuit
M66235FP
STANDARD CLOCK GENERATOR
STANDARD CLOCK GENERATOR
PIN CONFIGURATION (TOP VIEW)
→
OUTPUT
CLK IN
TEST1
TEST2
PULSE
CKO/2
CKO/2
GND
GND
1
→
←
←
←
←
2
3
4
5
6
7
8
M66235FP
Outline 16P2N-A
Note: Keep test pins (TEST 1 to 3) open.
16
15
14
13
12
11
10
9
CLOCK INPUT
TEST INPUT
TEST OUTPUT
ONE-SHOT PULSE
1/2 DIVIDER SYNC CLOCK
INVERTED OUTPUT
1/2 DIVIDER SYNC
CLOCK OUTPUT
M66235FP
VCC
TEST3
→
←
→
→
→
TEST OUTPUT
GND
TR
TRIGGER INPUT
VCC
CKO
SYNC CLOCK OUTPUT
SYNC CLOCK
CKO
INVERTED OUTPUT
CONTINUOUS
CNTCK
CLOCK OUTPUT
APPLICATION
Clock phase control for horizontal synchronization
BLOCK DIAGRAM
SYNC CLOCK SELECTOR CIRCUIT
CLOCK
INPUT
CLK IN
1
DELAY CLOCK
GENERATION CIRCUIT
V
CCVCC
12 16
SYNC CLOCK GENERATION CIRCUIT
11
10
7
6
9
4
SYNC CLOCK
CKO
OUTPUT
SYNC CLOCK
CKO
INVERTED OUTPUT
1/2 DIVIDER SYNC
CKO/2
CLOCK OUTPUT
1/2 DIVIDER SYNC
CKO/2
CLOCK INVERTED OUTPUT
CONTINUOUS
CNTCK
CLOCK OUTPUT
ONE-SHOT
PULSE
PULSE OUTPUT
TRIGGER
INPUT
TEST
INPUT
TR
TEST1
13
2
PHASE DETECTION CIRCUIT
3
TEST2 TEST OUTPUT
15
TEST3 TEST OUTPUT
85
14
GNDGND
GND
1
MITSUBISHI 〈DIGITAL ASSP〉
M66235FP
STANDARD CLOCK GENERATOR
FUNCTION
M66235 standard clock generator outputs clock input signal,
which is input to CLK IN, synchronously with optional trigger
signal, which is input to TR.
Sync clock output timing is determined by trigger input signal
fall edge. Time-lag between trigger input signal fall edge and
sync clock output equals the sum of clock input signal “L”
pulse width and M66235 internal delay. Variation in this lag
(∆t) is ±3ns, ensuring excellent synchronizing accuracy.
There are six types of outputs: synchronous clock output
(CKO), synchronous clock inverted output (CKO), 1/2 divider
synchronous clock output (CKO/2), 1/2 divider synchronous
clock inverted output (CKO/2), one-shot pulse output
(PULSE) and continuous clock output (CNTCK).
From synchronous clock output (CKO), sync clock of the
same frequency as clock input signal is output. From synchronous clock inverted output (CKO), inverted signal of sync
1/f
IN
CLK IN
t
w(TR)
TR
t
sp(CKO)
CKO
t
sp(CKO)
CKO
t
sp(CKO/2)
CKO/2
t
sp(CKO/2)
CKO/2
PULSE
CNTCK
t
CH
clock output from CKO is output. From 1/2 divider synchronous clock output (CKO/2), 1/2 divider signal of sync clock
output from CKO is output. From 1/2 divider synchronous
clock inverted output (CKO/2), inverted signal of that output
from CKO/2 is output.
From one-shot pulse output (PULSE), one-shot pulse which
is almost equal to two cycles of clock input signal is output
after trigger input signal falls. From continuous clock output
(CNTCK), sync clock is output when trigger input signal is on
“L” level; when trigger input signal is on “H” level, clock input
signal, which is input to CLK IN, is output.
All these outputs but continuous clock output are suspended
when trigger input signal is on “H” level: Synchronous clock
output, 1/2 divider synchronous clock output and one-shot
pulse output stay on “L” level, and synchronous clock inverted
output and 1/2 divider synchronous clock inverted output stay
on “H” level.
V
0V
3V
0V
∆t
t
t
t
t
t
t
CL
ss(CKO)
ss(CKO)
ss(CKO/2)
ss(CKO/2)
ss(PULSE)
∆t
∆t
∆t
∆t
t
w(PULSE)
∆t
t
ss(CNTCK)
V
V
V
V
V
V
V
V
V
V
V
V
CC
OH
OL
OH
OL
OH
OL
OH
OL
OH
OL
OH
OL
Note 1:tSS (CKO, CKO, CKO/2, CKO/2 and PULSE) equals the sum of input clock “L” width and α . Value α refers to internal delay in M66235. Under envi-
ronment where temperature and V
chronizing precision (jitter)].
Note 2:Outputs (CKO, CKO, CKO/2, CKO/2 PULSE and CNTCK) are unknown until trigger input TR reaches “H” level for the first time after power-on.
CC do not change, value α and tss are kept constant. Dispersion of tss under such conditions is defined as ∆t [syn-
2
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