My Inquiry
My Account
Analog Devices Inc. LTC1045CSW#PBF
- Part No.:
- LTC1045CSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
LTC1045CSW#PBF.pdf
- Description:
- IC TRANSLTR UNIDIRECTIONAL 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,375
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1045CSW#PBF from Analog Devices (formerly Linear Technology) is a micropower hex level translator IC with six independent comparator-based translators, three-state outputs, programmable bias current via external resistor, and full power shutdown capability. It supports TTL/CMOS-to-±5V analog switch drive, ECL-to-CMOS translation (3V–15V VCC), and ground-isolated buffering. Used in RS232 line receivers and flat ribbon cable driver/receiver systems.
For engineers reviewing the LTC1045CSW#PBF datasheet, LTC1045CSW#PBF pinout, LTC1045CSW#PBF application, or LTC1045CSW#PBF equivalent, key selection considerations include its 20-lead SO Wide package, ±50V input tolerance with 100kΩ limiting resistor, 1.2µs response at 100µA supply current, internal hysteresis for noise immunity, and dual trip-point architecture (VTRIP1 for IN1–IN4, VTRIP2 for IN5–IN6).
Technical Context
The LTC1045CSW#PBF integrates six high-speed comparators with output latches and three-state capability in a single monolithic CMOS die. Each comparator features a dedicated positive input (IN1–IN6), shared negative inputs grouped as VTRIP1 (pins 9, IN1–IN4) and VTRIP2 (pin 8, IN5–IN6), enabling flexible threshold configuration across two independent voltage windows.
Power/speed trade-off is controlled via ISET (pin 12): connecting ISET to V– through an external resistor sets bias current (100µA–3.5mA), directly modulating propagation delay (1.2µs–100ns) and hysteresis (7mV–20mV). Forcing ISET to V+ shuts down linear circuitry while retaining CMOS output state latch functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Supply Voltage Range | 4.5V to 15V differential between V+ and V–; VOH–VOL ≥ 3V - enables wide-rail logic translation including ±5V analog switch drive |
| Input Voltage Range | V– to (V+ – 2V) on VTRIP pins; inputs tolerate ±50V with 100kΩ external limiting resistor - supports high-voltage isolation and fault-tolerant sensing |
| Supply Current (Active) | 2.5mA to 4.5mA typical at RSET = 10kΩ - programmable quiescent current allows optimization for speed vs. micropower operation |
| Supply Current (Shutdown) | 10nA typical when ISET = V+ - near-zero static power enables battery-backed or always-on isolation applications |
| Response Time | 1.2µs at 100µA supply current; 100ns at full bias - selectable delay supports timing-critical and ultra-low-power use cases |
| Hysteresis | 7mV to 20mV, adjustable via RSET - improves noise immunity without external components in noisy industrial environments |
| Output Drive | VOH ≥ 2.4V @ –360µA; VOL ≤ 0.4V @ 1.6mA - meets TTL/CMOS logic thresholds across full temperature range (–40°C to +85°C) |
Pinout & Package
Package: 20-lead plastic small-outline wide (SO WIDE), 0.300-inch body width, JEDEC MS-013 compliant. Pin pitch: 0.050 inch (1.27 mm). RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VOH) | Output High Reference | Defines high-level output voltage rail; must be ≤ V+ and ≥ (V– + 3V); sets VOH switching threshold |
| 2–7 (IN1–IN6) | Comparator Positive Inputs | Six independent signal inputs; each drives one translator stage; no internal clamping diodes |
| 8 (VTRIP2) | Trip Reference for IN5/IN6 | Common negative input for comparators 5 and 6; programmable threshold within V– to (V+ – 2V) |
| 9 (VTRIP1) | Trip Reference for IN1–IN4 | Common negative input for comparators 1–4; independent of VTRIP2 for dual-threshold designs |
| 10 (V–) | Negative Supply Rail | Ground or negative reference for comparator core; also used as low-level output reference (VOL) |
| 11 (VOL) | Output Low Reference | Defines low-level output voltage rail; must be ≥ V– and ≤ (V+ – 3V); sets VOL switching threshold |
| 12 (ISET) | Bias/Shutdown Control | Three functions: (1) RSET to V– programs bias current, (2) forced to V+ shuts off linear circuitry, (3) forces output latch |
| 13 (DISABLE) | Three-State Enable | Active-high control; when high, all six outputs enter high-impedance state for bus sharing |
| 14–19 (OUT1–OUT6) | Translator Outputs | CMOS-compatible buffered outputs with latch and three-state capability; driven by respective comparators |
| 20 (V+) | Positive Supply Rail | Main comparator supply; must be ≥ (V– + 4.5V); maximum differential to any other supply pin is 15V |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Power/Speed Trade-off | External RSET on ISET pin adjusts supply current from 100µA to 3.5mA, scaling response time from 1.2µs to 100ns |
| Complete Power Shutdown | ISET forced to V+ disables comparator core while preserving output latch state - <10nA supply current, zero DC dissipation |
| Dual Independent Trip Points | VTRIP1 (pin 9) sets thresholds for first four channels; VTRIP2 (pin 8) sets thresholds for last two - enables multi-level detection |
| ±50V Input Tolerance | Inputs withstand ±50V with 100kΩ series resistor - eliminates need for external protection in high-voltage industrial I/O |
| Three-State Outputs with Fast Enable | DISABLE pin asserts Hi-Z in 165ns; releases to active state in 200ns - suitable for shared data bus interfacing |
Applications
| RS232 Line Receiver | Flat Ribbon Cable Driver/Receiver |
|---|---|
Use Scenario: Converting ±3V to ±15V RS232 signals to 0V/5V TTL logic in embedded serial interfaces. IC Role / Device Role / Timing Role: Level translator and receiver buffer with internal hysteresis to reject line noise and ground bounce. Use Value: Eliminates discrete resistor networks and Schmitt triggers; supports 20ft cable runs with 150Ω characteristic impedance matching. |
Use Scenario: Driving and receiving 6-bit parallel data over 66-ft flat ribbon cables in industrial backplanes. IC Role / Device Role / Timing Role: Hex translator with matched propagation delay and ground-isolation capability between subsystems. Use Value: Enables bidirectional communication across isolated grounds while maintaining signal integrity at 100ns/div edge rates. |
| Ground Isolation Buffer | Analog Switch Driver |
Use Scenario: Interfacing TTL/CMOS logic between two systems with non-common or floating grounds (e.g., motor drive and controller). IC Role / Device Role / Timing Role: Voltage translator with common-mode input range spanning V– to (V+ – 2V), allowing logic threshold referencing to either ground domain. Use Value: Prevents ground loop currents while preserving logic levels; supports up to ±10V ground offset without external level shifters. |
Use Scenario: Driving CD4016-type analog switches requiring ±5V control signals from 5V microcontroller GPIOs. IC Role / Device Role / Timing Role: Translating 0V/5V logic to ±5V switch gate drive with fast edge rates and low output impedance. Use Value: Enables rail-to-rail analog signal switching without external charge pumps or discrete MOSFET drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex level translator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX3001EAP+T | 6-channel, 3.3V/5V dual-supply translator; no shutdown mode; fixed 3.5ns propagation delay; no programmable hysteresis | Optimized for high-speed digital buses (e.g., SPI, I²C); lacks ±50V input tolerance and ground-isolation flexibility | Select when deterministic sub-ns timing is required and high-voltage robustness is not needed. |
| SN74LVC8T245RHLR | Octal bus transceiver with auto-direction sensing; 1.65V–5.5V VCC; no independent trip points; no analog switch drive capability | Designed for bidirectional data bus translation; lacks comparator-based threshold control and analog interface support | Select for general-purpose logic-level shifting where direction control and wide VCC range outweigh precision threshold needs. |
Compared with MAX3001EAP+T and SN74LVC8T245RHLR, the LTC1045CSW#PBF uniquely combines programmable speed/power, dual trip-point comparators, ±50V input tolerance, and true analog switch drive capability - making it irreplaceable in isolated industrial I/O and high-voltage sensor interface designs.
Availability
LTC1045CSW#PBF is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and test equipment requiring stable component supply, long-term lifecycle continuity, and guaranteed RoHS-compliant sourcing.
Supply support for LTC1045CSW#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains full product support, datasheet archives, and application engineering resources for legacy Linear parts.
The LTC1045CSW#PBF belongs to Linear's precision analog translator family, designed specifically for robust level-shifting in electrically noisy, ground-isolated, and high-voltage industrial environments.
FAQ
What is the absolute maximum supply voltage rating for LTC1045CSW#PBF?
The LTC1045CSW#PBF has an absolute maximum total supply voltage (V+ to V–) of 18V, with a recommended operating differential of ≤15V. The VOH–VOL differential must be ≥3V and ≤15V. Exceeding these limits risks permanent damage due to internal parasitic diode conduction or oxide breakdown. Always observe Note 2 in the datasheet regarding differential voltage constraints between any two power pins.
How does the ISET pin function in LTC1045CSW#PBF beyond setting bias current?
In addition to programming bias current via an external resistor to V–, the ISET pin on the LTC1045CSW#PBF serves two critical roles: (1) forcing ISET to V+ completely shuts off the comparator core while retaining CMOS output latch state, reducing supply current to 10nA; (2) the rising edge of ISET triggers output latching with 80ns setup time, enabling precise data capture in asynchronous systems.
Can LTC1045CSW#PBF drive analog switches like the CD4016 directly?
Yes, the LTC1045CSW#PBF is explicitly designed for ±5V analog switch drive. With V+ = 5V, V– = –5V, VOH = 5V, and VOL = –5V, its outputs deliver rail-to-rail control signals compatible with CD4016 gate thresholds. Its low output resistance (ROH ≈ 260Ω, ROL ≈ 100Ω) ensures fast switch turn-on/turn-off without external buffers - confirmed in Typical Application TA06.
What is the purpose of separate VTRIP1 and VTRIP2 pins on LTC1045CSW#PBF?
VTRIP1 (pin 9) sets the common negative input threshold for comparators IN1–IN4, while VTRIP2 (pin 8) sets the threshold for IN5–IN6. This dual-trip architecture allows independent voltage window detection - for example, using IN1–IN4 to monitor a 0–3V sensor range and IN5–IN6 to detect overvoltage events above 4V - without external resistive dividers or additional ICs.
Does LTC1045CSW#PBF require external pull-down resistors on its inputs?
No, the LTC1045CSW#PBF inputs have no internal clamping diodes and do not require external pull-downs for normal operation. However, in floating-input scenarios (e.g., unused channels), a weak pull-down (e.g., 100kΩ to V–) is recommended to prevent undefined states and reduce susceptibility to EMI - as noted in Typical Application TA12 for RS232 receiver use.
LTC1045CSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Unidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 6
- Voltage - VCCA:
- 4.5 V ~ 15 V
- Voltage - VCCB:
- 3 V ~ 15 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Programmable Power/Speed
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC (0.295", 7.50mm Width)
LTC1045CSW#PBF FAQ
1.How can I place an order for LTC1045CSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1045CSW#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC1045CSW#PBF reliable?
The price and inventory of LTC1045CSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1045CSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1045CSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1045CSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1045CSW#PBF?
LTC1045CSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1045CSW#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC1045CSW#PBF?
For technical support, including LTC1045CSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1045CSW#PBF requirements.
6.How does Aetrix verify that LTC1045CSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1045CSW#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC1045CSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1045CSW#PBF?
All LTC1045CSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1045CSW#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC1045CSW#PBF part is unused and in its original packaging.
Return procedure for LTC1045CSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1045CSW#PBF Tags
-
74LVC1T45GW,125
Nexperia USA Inc.
-
74LVCH2T45DC,125
Nexperia USA Inc.
-
SN74LVC1T45DBVR
Texas Instruments
-
SN74LVC1T45DRLR
Texas Instruments
-
SN74LVC1T45DPKR
Texas Instruments
-
SN74LVC2T45DCTR
Texas Instruments
-
74LVC2T45GT,115
Nexperia USA Inc.
-
SN74LVC1T45YZPR
Texas Instruments
-
LSF0102DCUR
Texas Instruments
-
SN74LVC1T45DCKR
Texas Instruments
-
TXS0102DCTR
Texas Instruments
-
FXLP34P5X
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
