Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsLogic ICsLogic IC - Transducer Programmable converter/receiver/driver, Three-state PDIP 20

LTC1045

1045fc

APPLICATIO S

FEATURES

DESCRIPTIO

TYPICAL APPLICATIO

Programmable

Micropower Hex Translator/

Receiver/Driver

100ns/DIV 045 TA01a

■

TTL/CMOS to ±5V Analog Switch Drive

■

TTL to CMOS (3V to 15V V

)

■

ECL to CMOS (3V to 15V V

)

■

Ground Isolation Buffer

■

Low Power RS232 Line Receiver

Flat Ribbon Cable Driver/Receiver

–

TTL IN

1.4V

0.5V

XMT IN

XMT OUT 66-FT FLAT RIBBON CABLE

ADJACENT CONDUCTORS

= 150Ω

150Ω

–

SET

DIS

RCV IN

RCV OUT

TTL OUT

1045 TA01

–

SET

DIS

XMT IN (5V/DIV)

XMT OUT (1V/DIV)

RCV IN (1V/DIV)

RCV OUT (5V/DIV)

■

Efficiently Translate Voltage Levels

■

Internal Hysteresis for Noise Immunity

■

Output Latches Included

■

Three-State Outputs

■

Programmable Power/Speed

■

Power Can Be Completely Shut Off

■

±50V on Inputs with External 100k Limit Resistor

■

1.2µs Response at 100µA Supply Current

The LTC

1045 is a hex level translator manufactured using

Linear Technology’s enhanced LTCMOS

silicon gate

process. It consists of six high speed comparators with

output latches and three-state capability. Each compara-

tor’s plus input is brought out separately. The minus inputs

of comparators 1 to 4 are tied to V

TRIP1

while 5 and 6 are

tied to V

TRIP2

The I

SET

pin has several functions. When taken to V

the

outputs are latched and power is completely shut off.

Power/speed can be programmed by connecting I

SET

to V

–

through an external resistor.

, LTC and LT are registered trademarks of Linear Technology Corporation.

LTCMOS is a trademark of Linear Technology Corporation.

Summary of content (20 pages)

PAGE 1
LTC1045 Programmable Micropower Hex Translator/ Receiver/Driver U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Efficiently Translate Voltage Levels Internal Hysteresis for Noise Immunity Output Latches Included Three-State Outputs Programmable Power/Speed Power Can Be Completely Shut Off ±50V on Inputs with External 100k Limit Resistor 1.
PAGE 2
LTC1045 W U PACKAGE/ORDER INFORMATION W W U W (Notes 1, 2) Total Supply Voltage (V +, V TOP VIEW to V –, V .............. 18V Output High Voltage (VOH) ...................................... ≤ V + Input Voltage ....................................18V to (V – – 0.3V) Output Short-Circuit Duration (VOH – VOL ≤ 10V) ................................... Continuous ESD (MIL-STD-883, Method 3015) .................... 2000V Operating Temperature Range .................
PAGE 3
LTC1045 AC ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. V + = VOH = 5V, V – = VOL = 0V, unless otherwise specified.
PAGE 4
LTC1045 U U U PIN FUNCTIONS VOH (Pin 1): High Level to which the Output Switches. VOL (Pin 11): Low Level to which the Output Switches. IN1 to IN7 (Pins 2 to 7): Six Comparator Inputs; Voltage Range = V – to V – + 18V. ISET (Pin 12): This has three functions: 1) RSET from this pin to V – sets bias current, 2) when forced to V + power is shut off completely and 3) when forced to V + outputs are latched. VTRIP2 (Pin 8): Trip Point for Last Two Comparators (Inputs 5,6); Voltage Range = V – to V + – 2V.
PAGE 5
LTC1045 W BLOCK DIAGRAM V OH V+ 20 1 V+ V OH + IN1 2 LEVEL SHIFT 19 OUT1 LATCH – DIS V BIAS V– LE VOL V+ V OH + IN2 3 18 OUT2 – DIS VBIAS LE V– V OL V+ V OH + IN3 4 17 OUT3 – DIS VBIAS LE V– V OL V+ V OH + IN4 5 16 OUT4 – DIS VBIAS LE V– V OL V+ V OH + IN5 6 15 OUT5 – DIS VBIAS LE V– V OL V+ V OH + IN6 7 14 OUT6 – DIS VBIAS LE V– V OL 13 DISABLE VREF ≈ 1.
PAGE 6
LTC1045 U U W U APPLICATIONS INFORMATION The LTC1045 consists of six voltage translators and associated control circuitry (see Block Diagram). Each translator has a linear comparator input stage with the positive input brought out separately. The negative inputs of the first four comparators are tied in common to VTRIP1 and the negative inputs of the last two comparators are tied in common to VTRIP2.
PAGE 7
LTC1045 U W U U APPLICATIONS INFORMATION Because of this diode, VOH must not be greater than V +. Lastly, the maximum voltage between any two power supply pins must not exceed 15V operating or 18V absolute maximum. For example, if V + = 5V, V – or VOL should be no more negative than – 10V. Note that VOL should not be more negative than – 10V even if the VOH to VOL differential does not exceed the 15V maximum. In this case the V + to VOL differential sets the limit.
PAGE 8
LTC1045 U TYPICAL APPLICATIONS ECL to CMOS/TTL Logic 5V V+ ECL IN V OH THREESTATE BUFFER + IN COMP LATCH OUT – VTRIP V– ISET VOL CMOS/TTL (VCC = 5V) DIS 1045 TA02 30k ~ –1.3V 10k –5.2V TTL/CMOS (VCC = 5V) to High Voltage CMOS (VCC = 15V) 15V V+ TTL/CMOS (VCC = 5V) V OH THREESTATE BUFFER + IN COMP VTRIP LATCH OUT – V– ISET VOL CMOS (VCC = 15V) DIS ~1.
PAGE 9
LTC1045 U TYPICAL APPLICATIONS TTL/CMOS (VCC = 5V) to Low Voltage CMOS (VCC = 3V) TTL/CMOS (VCC = 5V) IN 5V 3V V+ V OH THREESTATE BUFFER + COMP VTRIP LATCH OUT – V– ISET VOL CMOS (VCC = 3V) DIS ~1.5V 1045 TA05 100k TTL/CMOS Logic Levels to ±5V Analog Switch Driver 5V V+ TTL/CMOS (VCC = 5V) IN + VTRIP – V OH VDD THREESTATE BUFFER COMP LATCH ±5V IN SW ±5V OUT OUT VSS V– ISET VOL CMOS ANALOG SWITCH (CD4016 FOR EXAMPLE) DIS ~1.
PAGE 10
LTC1045 U TYPICAL APPLICATIONS Logic Ground Isolation when Two Grounds are within LTC1045 Common Mode Range SYSTEM A SYSTEM B VCC B = 5V VCC A = 5V V+ TTL/CMOS LOGIC IN V OH THREESTATE BUFFER + 2.7k COMP VTRIP VTRIP = 1.35V LATCH OUT LOGIC OUT – 1k SETS LOGIC THRESHOLD REFERRED TO GND A GND A V– ISET VOL DIS GND B V – = –5V 1045 TA08 (GND B – V – + VTRIP) ≤ GND A ≤ (GND B + VCC B – 2V – VTRIP) Coax Cable Driver/Receiver 5V 5V 20 TTL IN XMT IN V+ + 1 VOH VOL 1.
PAGE 11
LTC1045 U TYPICAL APPLICATIONS ±5V Analog Switch Driver 5V 5V 1 VOH 2 IN1 LTC1045 + V+ 14 20 CD4016 1 SW A 2 ±5V 13 OUT1 19 – 3 3 IN2 + SW B 4 ±5V 9 ±5V 11 ±5V 5 OUT2 18 – 8 4 IN3 TTL OR CMOS LOGIC INPUTS + SW C 6 OUT3 17 – 10 5 IN4 + SW D 12 OUT4 16 – 7 6 IN5 + 1045 TA09 OUT5 15 – 7 IN6 + –5V OUT6 14 – 8 VTRIP2 9 VTRIP1 10 V– DIS ISET VOL 13 12 11 ~1.
PAGE 12
LTC1045 U TYPICAL APPLICATIONS Logic Systems DC Isolation SYSTEM A SYSTEM B SYSTEM B POWER SUPPLY 1 VOH 2 IN1 LTC1045 + V+ 20 OUT1 19 – 3 IN2 + OUT2 18 – 4 IN3 + OUT3 17 – TTL OR CMOS 5 IN4 + CMOS OR TTL OUT4 16 – 6 IN5 + OUT5 15 – 7 IN6 + OUT6 14 – SYSTEM A POWER SUPPLY VTRIP* 8 VTRIP2 DIS 13 THREE-STATE CONTROL 1µF 9 VTRIP1 ISET 12 1µF** 10 V– VOL 11 † 100k SYSTEM A GND * SET VTRIP TO HALF WAY BETWEEN VOH AND VOL OF SYSTEM A ** SHUNTS COMMON MODE SIGNAL † PROVIDES
PAGE 13
LTC1045 U TYPICAL APPLICATIONS 24V Relay Supply from 12V/15V Supply V+ 1 VOH V+ LTC1045 2 IN1 + 20 OUT1 19 – 3 IN2 + OUT2 18 – 4 IN3 + OUT3 17 – 5 IN4 V+ + OUT4 16 – 6 IN5 1N4148 + 1N4148 OUT5 15 – V+ 10k 7 IN6 24V + 1µF + 10µF RL ≥ 1k OUT6 14 – 10k 10k 8 VTRIP2 9 VTRIP1 10 13 DIS 12 ISET V– 11 VOL 100k 10k 1045 TA13 1000pF RS232 Receiver 5V 20 30V 100k 2 V+ + –30V 9 0.
PAGE 14
LTC1045 U TYPICAL APPLICATIONS LED Driver V+ 5V TO 15V 1 VOH V+ LTC1045 2 IN1 + 20 OUT1 19 – 3 IN2 + OUT2 18 – 4 IN3 + OUT3 17 – LOW TURNS LED ON 5 IN4 + OUT4 16 TO LEDs – 6 IN5 + OUT5 15 – 7 IN6 + OUT6 14 – 8 VTRIP2 DIS 9 VTRIP1 10 ISET V– VOL 13 12 11 ≈ 1.5V 100k V+ 5V REF LED 6 – 5 + 100Ω 3 + 1 358 2 8 7 358 2N2905 (USE HEAT SINK) 4 2N2222 – ≈ 1.
PAGE 15
LTC1045 U TYPICAL APPLICATIONS Multiwindow Comparator and Display V+ 5V 1 V OH 2 IN1 VREF LTC1045 + 20 V+ OUT1 19 – R VH 3 IN2 + VIN > VREF OUT2 18 – 10k 4 IN3 + OUT3 17 – 10k 5 IN4 + OUT4 16 – 10k 6 IN5 + OUT5 15 – 10k 7 IN6 + OUT6 14 GI MV 57164* BAR GRAPH DISPLAY – 8 VTRIP2 DIS 9 VTRIP1 ISET VIN 10 1 V– VOH 10k 2 IN1 VOL LTC1045 + V+ 13 12 11 20 OUT1 19 – 10k 3 IN2 + OUT2 18 – 10k 4 IN3 + OUT3 17 – 10k 5 IN4 + OUT4 16 – 10k 6 IN5 + OUT5 15 –
PAGE 16
LTC1045 U TYPICAL APPLICATIONS ECL to CMOS from Single 5V Supply 5V 1 VOH 2 IN1 ECL IN LTC1045 + V+ 20 OUT1 19 – 3 IN2 ECL IN + OUT2 18 – 4 IN3 ECL IN + OUT3 17 – 5 IN4 ECL IN + OUT4 16 – 10k 6 IN5 5V CMOS OUT CMOS OUT CMOS OUT CMOS OUT 1µF + 1N4148 OUT5 15 – 10k 10k 7 IN6 + 1N4148 OUT6 14 + 10µF – 8 VTRIP2 DIS 9 VTRIP1 10 ISET V– VOL 13 12 11 22k ≈ –3.3V 51k ≈ –1.29V 10k 0.
PAGE 17
LTC1045 U PACKAGE DESCRIPTION J Package 20-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) 1.060 (26.924) MAX CORNER LEADS OPTION (4 PLCS) 0.023 – 0.045 (0.584 – 1.143) HALF LEAD OPTION 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 0.220 – 0.310 0.025 (5.588 – 7.874) (0.635) RAD TYP 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 0.005 (0.127) MIN 0.300 BSC (0.762 BSC) 0.200 (5.080) MAX 0.015 – 0.060 (0.381 – 1.524) 0.008 – 0.018 (0.203 – 0.
PAGE 18
LTC1045 U PACKAGE DESCRIPTION N Package 20-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 1.040* (26.416) MAX 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 0.255 ± 0.015* (6.477 ± 0.381) 0.130 ± 0.005 (3.302 ± 0.127) 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) ( +0.035 0.325 –0.015 +0.889 8.255 –0.381 ) 0.045 – 0.065 (1.143 – 1.651) 0.020 (0.508) MIN 0.065 (1.651) TYP 0.125 (3.175) MIN 0.005 (0.
PAGE 19
LTC1045 U PACKAGE DESCRIPTION SW Package 20-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) 0.496 – 0.512* (12.598 – 13.005) 20 19 18 17 16 15 14 13 12 11 0.394 – 0.419 (10.007 – 10.643) NOTE 1 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 × 45° (0.254 – 0.737) 1 2 3 4 5 6 7 8 9 0.093 – 0.104 (2.362 – 2.642) 10 0.037 – 0.045 (0.940 – 1.143) 0° – 8° TYP 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 0.050 (1.270) BSC 0.014 – 0.
PAGE 20
LTC1045 U TYPICAL APPLICATION Power MOSFET Driver Low Power Consumption Stepper Motor Driver +VM 1 ∅1 VOH LTC1045 2 IN1 + V+ B 20 OUT1 19 – ∅1 TTL STEPPER MOTOR PHASE SIGNALS 3 IN2 + RH BUZ171 ** 4-PHASE BIFILAR STEPPER MOTOR OUT2 18 – ∅2 4 IN3 + OUT3 17 – ∅2 5 IN4 + * OUT4 16 * – 5V 6 IN5 + 51k ≈ 1.4V – 7 IN6 + 20k STEP A CLOCK BUZ71A BUZ71A ** OUT5 15 ** BUZ71A ** BUZ71A ** OUT6 14 – C 8 VTRIP2 DIS 13 MOTOR GND 9 VTRIP1 RP 0.