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Specifications for Cintra/Tektronix 909 "Scientist"

Manufacturer: Cintra Corp./Tektronix Inc.
Model Number: 909 Scientist
Serial Number: Two Units in Museum
#1: Model 909-01, Serial #4605
#2: Model 909-01, Serial #4220 (Non-Operational)
Date of Manufacture: #1: Late-1971
#2: Mid-1971
Manufactured In: USA, Sunnyvale, California
Original Price: Base Price $3,780 Cintra & Tek Intro. Price
$3,200 (Base Price, Tektronix, 9/71)
$3,700 (Tektronix Price for 909-03 (max. config.)
Weight: 24 Pounds
Size: 14 1/2" Wide, 15" Deep, 8 1/4" High
Power Requirement: Switch Selectable 115/230 VAC, 45 Watts
Display Technology: Nixie Tubes Mfg. by National Labs
2 - NL847 Sign (Mantissa & Exponent)
1 - NL939 0-9 w/Left & Right Decimal (MSD of Mantissa)
11 - NL846 0-9 w/Right Decimal (Mantissa)
2 - NL844 0-9 No Decimal (Exponent)
Special "x10" Exponential Notation Indicator
Logic Technology: Some LSI IC's made by Electronic Arrays
4 - CPN 3130-30, 1 - CPN 3130-31, 1 - CPN 3130-32
1 - CPN 3130-33, 1 - CPN 3130-34, 1- CPN 303-35
1 - CPN 3130-37
Large number of 7400-Series TTL & Some DTL Small and Medium-Scale IC's
Five plug-in Circuit Boards
Digits of Capacity: 10 mantissa, 2 exponent, both w/sign
Calculations made internally to 12 significant digits
Left-Justified, Left Entry, No lead/trailing zero suppression
Decimal Modes: Full floating or normalized scientific notation
Arithmetic Logic: Full Algebraic w/Precedence & Parentheses
Math Functions: Four Function,
Integerize, Pi Recall, Degree/Radian Conversion
Standard & Hyperbolic Trigonometric Functions w/ Inverse
Square Root, Square, Reciprocal, Triangle Formula
xy, Base e and Base 10 Logarithms
Constant: No
Memories: 26 Registers [Base & Option 01]
100 w/Option 02 or 03
Direct and Indirect Memory Access
Programmable: Yes, Learn Mode, Linear Only
85 Steps of Program Storage (Base/Option 02)
256 Steps w/Option 01 or 03
Peripherals: 8-bit Parallel Bus-Style Connection, up to 8 devices
- Model 941 Printer ($700)
- Model 944 Teletype Interface ($1,390)
- Model 923 Punched Card Reader ($350)
- Model 915 X/Y Plotter ($2,650)
- Model 926 Programmer ($1,495)
- Model 928 Instructor ($245)
- Model 905 Junction Box ($75)
- Model 920 f(x) Repeater ($150)
Performance: Add/Subtract: 0.6ms
Multiply, Divide: 3.0ms
Loge(x): 16ms
Trig. Functions: 100ms
Notes: Four different configurations:
- Model 909: Base Unit, 85 Steps, 26 Registers
- Model 909-01: 256 Steps, 26 Registers
- Model 909-02: 85 Steps, 100 Registers
- Model 909-03: 256 Steps, 100 Registers
The Model 911 Statistician replaced four keys with statistics-related functions.



Previous Machine: Canon L163
Next Machine: Sharp 363P

Related Machines: Tektronix 31

Advertising: Introducing the Tektronix Calculator Family [54K]
Cover of Tektronix Scientist 909 Operator's Manual [285K PDF]
The Cintra Scientist 909... [151K]
New Product Introduction Catalog Supplement - July 1971 [151K]
Tektronix Calculators and Periperals Catalog - Sept., 1971 [26 Pages] [139K]

Patents: US Patent Number 3,720,820 [Algebraic Math System]
US Patent Number 3,760,370 [Memory Register Addressing]

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