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MC4024 Subcircuit

By popular request I finally rolled a subcircuit for my mid '60's MC4024 voltage-controlled multivibrator...

****************************************************************** .SUBCKT MC4024 VCX CX1 CX2 OUT VCCM VCCO GNDM GNDO R_R1 VCX N_1 1K R_R2 N_2 N_3 2.6K R_R4 VCCM N_4 250 R_R3 N_5 GNDM 1.1K R_R10 N_6 GNDM 150 R_R8 N_7 N_6 300 R_R6 N_8 N_9 250 R_R9 N_6 N_10 300 R_R5 VCCM N_11 250 R_R16 VCCM N_12 3.1K R_R15 N_13 N_14 900 R_R19 N_15 N_16 200 R_R18 VCCM N_15 4K R_R20 VCCO N_17 1.4K R_R22 N_18 N_19 250 R_R23 N_18 N_20 500 R_R14 N_21 GNDM 2K R_R13 N_22 GNDM 100 R_R12 N_23 GNDM 100 R_R11 N_24 GNDM 600 R_R21 VCCO N_25 100 R_R7 N_9 N_26 250 R_R17 N_27 N_28 750 Q_Q1 VCCM N_1 N_2 [GNDM] NPN4024 Q_Q2 N_4 N_13 CX1 [GNDM] NPN4024 Q_Q3 VCCM N_4 N_27 [GNDM] NPN4024 Q_Q4 VCCM N_11 N_13 [GNDM] NPN4024 Q_Q6 N_4 N_13 N_8 [GNDM] NPN4024 Q_Q7 N_11 N_27 N_26 [GNDM] NPN4024 Q_Q5 N_11 N_27 CX2 [GNDM] NPN4024 Q_Q21 N_29 N_29 OUT [GNDM] NPN4024 10X Q_Q20 N_25 N_17 N_29 [GNDM] NPN4024 10X Q_Q23 OUT N_18 GNDO [GNDM] NPN4024 10X Q_Q22 N_20 N_19 GNDO [GNDM] NPN4024 Q_Q19 N_17 N_16 N_18 [GNDM] NPN4024 Q_Q18 N_16 N_21 GNDM [GNDM] NPN4024 Q_Q17 N_15 N_28 N_21 [GNDM] NPN4024 Q_Q16 N_28 N_14 N_22 [GNDM] NPN4024 Q_Q15 N_14 N_14 N_23 [GNDM] NPN4024 Q_Q14 N_30 N_30 N_24 [GNDM] NPN4024 Q_Q13 N_12 N_12 N_30 [GNDM] NPN4024 Q_Q12 VCCM N_12 N_3 [GNDM] NPN4024 Q_Q11 CX2 N_3 N_10 [GNDM] NPN4024 Q_Q10 N_9 N_30 N_6 [GNDM] NPN4024 Q_Q8 CX1 N_3 N_7 [GNDM] NPN4024 Q_Q9 N_3 N_3 N_5 [GNDM] NPN4024 ****************************************************************** .MODEL NPN4024 NPN IS=3.860200f BF=120 NF=1.04845 VAF=61.1026 IKF=
  • 50m ISE=3.100000p NE=2.16533 BR=100m NR=1.04845 ISC=0
  • NC=1 RB=214.644 RBM=214.644 RE=721.4m RC=9.2065 CJE=1.249000p
  • VJE=900m MJE=500m TF=210.000000p XTF=1.85 VTF=1.585
  • ITF=50m PTF=0 CJC=1.000000p VJC=750m MJC=333m
  • XCJC=500m TR=10n CJS=6.3p VJS=750m MJS=
  • 500m XTB=1.5 EG=1.11 XTI=3 KF=0 AF=1 FC=500m
****************************************************************** .ENDS MC4024 ******************************************************************

...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson
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Close, 6½ ;-) ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

Reply to
Jim Thompson

26 in human years? One of your first then.

What's the oldest still in use or production?

Belated Happy Birthday to you and Gioacchino Rossini.

--

Reply in group, but if emailing add one more
zero, and remove the last word.
Reply to
Tom Del Rosso

Yes.

Quite a ways after my first, actually. The standard product OpAmps and comparators, some band-gaps (which I didn't have the brains to publish before Widler :-), the 1488/89 RS-232 driver/receiver set, several video and RF/IF, and oodles of automotive custom (non-catalog, see the patents for details) stuff predate my PLL works, of which the MC4024 was the first, then the MC4044 PFD, and all the following PECL equivalents.

I used to average 4-6 chip designs a year and I still do ~2 per year... of course they're quite a bit more complex than the "jelly-bean" stuff of my youth. That recent Long Island project was a doozy of analog complexity which I finished off in 3 months (with a few more months of occasional hand-holding so they could understand what I did... they're still calling as they try to write a test plan without having the test pads (or port routing) that I warned them they needed :-)

MC1530 OpAmp (*), still being made by Lansdale who bought the rights from Motorola.

(*) Designed it, bread-boarded it, then laid it out on a quadrille pad... 25.4u x 38.1u (1mil x 1.5mil) emitter sizes ;-)

And still being used as a teaching example at Rochester Institute of Technology, and also in India, as someone here pointed out.

See...

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The present Rochester project came about because RIT also was using the MC4024 as a teaching example.

Thanks! A disc with 7 of Rossini's Overtures is presently residing in my player... though I had no idea he was a "leaper"... he's just one of my favorite "rousers" to get my blood flowing... "La gazza ladra" is my favorite ;-) ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

=3D

0p

=A0 =A0 ...Jim Thompson

=A0 =A0| =A0 =A0mens =A0 =A0 |

=A0 | =A0 =A0 et =A0 =A0 =A0|

=A0|

=A0 =A0 =A0 |

I think Sandra Fluke would like one of these --- FOR FREE!

Reply to
brent

[snip]
[snip]

Took me a while for that to register... I didn't know her name, just as a Georgetown University law student ;-) ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

Hi Jim,

How was the MC1530 with respect to latchup issues? I recall reading that some "early" opamps, i.e. devices that didn't have current mirrors supplying the collectors of the input pair, were prone to latchup if the common mode voltage range was exceeded.

Reply to
bitrex

=A0 =A0 =A0 ...Jim Thompson

=A0 =A0 ...Jim Thompson

=A0 =A0| =A0 =A0mens =A0 =A0 |

=A0 | =A0 =A0 et =A0 =A0 =A0|

=A0|

=A0 =A0 =A0 |

LOL. You met her once? She must have wanted that multi vibrator pretty bad.

Reply to
brent

There _is_ a current mirror supporting the input pair in the MC1530, but no current mirror loads, just resistors... this was before we figured out how to make a lateral PNP... my old buddy (physicist) Jim Dunkley figured that out.

I don't remember any problems, but examining the schematic, connected as a unity follower, exceeding positive CMR would "stick" with output low, as least as long as the input was high.

But I see no nasty current paths unless the input exceeded VCC by

2*Vbe (~1.4V). (Keep in mind, this was before ESD... it's all bipolar and BIG junctions.)

The biggest customers right now are military and ancient industrial control systems so, if there were issues, I'd hear of it.

I've had inquiries about designing a lower power version, on a modern process, but no one wants to spend the money... they think it should be free ;-) ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

[snip]
[snip]

No! No! Just from the news reports ;-)

I was born in George Washington University Hospital, but that was in a different century ;-) ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.     Sometimes I even put it in the food.
Reply to
Jim Thompson

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