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MITSUMI
IC for XO MM1424, MM1624
IC for XO
Monolithic IC MM1424, MM1624 Series
Outline
This is a low current consumption, low operating voltage XO IC with Colpitz oscillation circuit. Smaller size is achieved by the on-chip bias circuit and Colpitz oscillation capacitor.
Features
1. Low current consumption. 1.5mA max. (Vcc = 2.8V) 2. Low power supply operating voltage. Vcc = 2.3 to 3.3V 3. On-chip Colpitz oscillation capacitor * On-chip bias resistor. 4. Low phase noise. -140dBc (@1kHz) 5. Ultra-small package type.
Package
SC-82 (MM1424CUXX) MCSP-4A (MM1424CCXX) WLCSP-4A (MM1624CLXX)
Applications
1. Crystal oscillators 2. VCXO 3. TCXO
Pin Assignment
MM1424CUXX MM1424CCXX MM1624CLXX
4
3
1
4
1
4
1
2
2
3
2
3
SC-82 (TOP VIEW) 1 2 3 4 X'tal GND VOUT VCC 1 2 3 4
MCSP-4A (TOP VIEW) GND X'tal VCC VOUT 1 2 3 4
WLCSP-4A (TOP VIEW) X'tal GND VOUT VCC
MITSUMI
IC for XO MM1424, MM1624
Equivalent Circuit Diagram
MM1424CUXX
VCC VOUT
4
3
47k
830
130k
36p
73p
73p
250
1
X'tal
2
GND
MM1424CCXX
VCC VOUT
3
4
47k
830
130k
36p
73p
73p
250
2
X'tal
1
GND
Note : The component values in the schematic circuit diagram are typical.
MITSUMI
IC for XO MM1424, MM1624
Pin Description
Pin No MM1424CUXX MM1424CCXX MM1624CLXX 1 2 3 4 2 1 4 3 1 2 3 4 (Ta=25C) Symbol TSTG TOPR VCC max. VIN max. Pd Ratings -40~+125 -30~+80 5.5 0 < VIN < VCC = = 150(MM1424CUXX) Power dissipation 180(MM1424CCXX) Unit C C V V mW Pin name X'tal GND VOUT VCC X'tal pin GND Output pin Supply voltage Functions
Absolute Maximum Ratings
Item Storage temperature Operating temperature Supply voltage Input voltage
* 220(MM1624CLXX) *
Note : Assembled on PC board. Pc board dimensions : 80 20mm, t=0.8mm, (MM1424CCXX) Material : Glass epoxy 110 40mm, t=0.8mm, 4 stratum (MM1624CLXX)
*
Recommended Operating Conditions
Item Operating temperature Supply voltage Operating frequency Symbol TOPR VOP FOPR Ratings -30~+80 2.3~3.3 10~26 Unit C V mHz
Note : The definition of the operation at the recommended operating conditions is to oscillate.
*
Electrical Characteristics
Item Current consumption Output frequency Output voltage Duty ratio Negative resistance 3
(VCC=2.7V, Ta=252C, Load : 2k // 10pF, fosc=26MHz unless otherwise specificd) Measurement conditions VCC=2.8V Min. Typ. Max. Unit 1.3 -30 0.8 0 1.05 60 0 0 0.2 0.3 1.5 30 mA ppm V % ppm ppm
Symbol Icc FO VOUT Duty RN f-VCC f-LO
*1
VCC=2.6V VCC=2.6~2.8V
*2
40 -100 -150 -0.2 -0.3
*
VIN=0.1Vrms, 26MHz VCC=2.7V0.1V RL=2k10% CL=10pF10%
Frequency stability-supply voltage variation 3
* Frequency stability-load variation 3 * * * * *
Note1 1: Output frequency satisfies the results measured by the correlation test boxes. Note2 2: Duty ratio is measured at the center of Vp-p. Note3 3: The items of 3 are only guaranteed by the desigh of the circuit.
MITSUMI
IC for XO MM1424, MM1624
Measuring Circuit
MM1424CUXX
10000pF A 2k VCC 10000pF 4 3 10pF VCC TP A 2k 10000pF 3 4 10pF
MM1424CCXX
10000pF
TP
MM1424 1 10pF X'tal 26MHz 2 10pF X'tal 26MHz
MM1424 2 1
47
47
* This load capacity (10pF) contains a capacity of a probe.
* This load capacity (10pF) contains a capacity of a probe.
MM1624CLXX
10000pF A 2k VCC 10000pF 4 3
TP 10pF
MM1624 1 10pF X'tal 26MHz 2
47
* This load capacity (10pF) contains a capacity of a probe.
MITSUMI
IC for XO MM1424, MM1624
Circuit diagram which is to measure the negative resistance. MM1424CUXX
10000pF 10000pF VCC 4 3 2k 10pF VCC 3 4 10000pF
MM1424CCXX
10000pF 2k 10pF
MM1424 1 1F 2 1F
MM1424 2 1
VIN
0.1Vrms 26MHz sine wave TP
VIN
0.1Vrms 26MHz sine wave
TP
MM1624CLXX
10000pF 10000pF VCC 4 3 2k 10pF
MM1624 1 1F 2
VIN
0.1Vrms 26MHz sine wave
TP

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