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Texas Instruments TLC59212IN
- Part No.:
- TLC59212IN
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC59212IN.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
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Product details
Overview
TLC59212IN from Texas Instruments is an 8-bit open-collector sink driver with latch, designed for 5-V logic-level control of high-voltage (up to 24 V) LED or relay loads. It features positive-edge-triggered D-type flip-flops per channel, 40 mA maximum sink current per output, and direct asynchronous clear (CLR). It is commonly used in multiplexed LED displays and industrial indicator arrays.
For engineers reviewing the TLC59212IN datasheet, TLC59212IN pinout, TLC59212IN application, or TLC59212IN equivalent, key selection criteria include its 20-pin PDIP package, latch-enabled parallel data retention, 24 V output voltage capability, and compatibility with 5 V microcontroller I/O interfaces.
Technical Context
The TLC59212IN implements eight independent D-type latches, each triggered on the rising edge of CLK and asynchronously reset by low-active CLR. Each latch drives a dedicated open-collector NPN output stage capable of sinking up to 40 mA at up to 24 V.
Its LBC3S (Lin BiCMOS) process enables high-voltage tolerance while maintaining TTL/CMOS-compatible input thresholds (Vt+ = 3.5 V, Vt− = 1.5 V), and it supports operation across –40°C to +85°C with supply voltage regulated between 4.5 V and 5.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V digital systems and stable latch operation |
| Output Voltage Max | 24 V - allows direct driving of common industrial LEDs, relays, and solenoids without external level-shifting |
| IOL Max | 40 mA per channel - sufficient for bright LED segments or small-signal relay coils |
| Input Thresholds | Vt+ = 3.5 V, Vt− = 1.5 V - provides robust noise margin against 5 V logic transitions |
| Propagation Delay | tPLH/tPHL ≤ 250 ns - supports clock rates up to ~2 MHz for static display updates |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood indicator applications |
| ESD Rating | HBM ±2000 V - meets JEDEC JESD22-A114A for handling in standard assembly environments |
Pinout & Package
20-pin plastic dual in-line package (PDIP), body size 24.33 mm × 6.35 mm, through-hole mounting with 2.54 mm pitch. RoHS-compliant lead finish, rated for industrial temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLR | Asynchronous clear input | Active-low global reset: forces all Y outputs high-impedance regardless of CLK or D states |
| D1–D8 | Data inputs | Parallel 8-bit latch inputs; each controls corresponding Y output state on next CLK rising edge |
| CLK | Clock input | Positive-edge-triggered latch enable; transfers Dn to Yn only on rising transition meeting tsu/th timing |
| Y1–Y8 | Open-collector outputs | Sink drivers: pull load cathodes to GND when active; require external pull-up to VLED (≤24 V) |
| VCC | Logic supply | Powers internal logic and input buffers; separate from VLED, enabling mixed-voltage system design |
| GND | Ground reference | Common return for logic and output current paths; must be low-impedance for stable switching |
Key Features
| Feature | Design Value |
|---|---|
| 8-bit latch architecture | Retains output states independently of MCU bus activity - enables stable LED patterns during host processor interrupts or sleep |
| 24 V open-collector outputs | Eliminates need for external high-side drivers or optocouplers when interfacing with 12 V/24 V industrial loads |
| Direct clear (CLR) input | Hardware-level emergency shutdown: disables all outputs synchronously without software intervention or clock dependency |
| LBC3S BiCMOS process | Combines bipolar output drive strength with CMOS input efficiency - achieves 40 mA sink current while limiting ICC to 20 μA (all ON) |
| –40°C to +85°C rating | Validated performance across full industrial temperature range - suitable for panel-mounted displays and factory-floor controllers |
Applications
| LED Display Multiplexing | Industrial Indicator Arrays |
|---|---|
Use Scenario: Driving 8-segment alphanumeric displays or dot-matrix panels where MCU GPIO count is limited. IC Role / Device Role / Timing Role: Sink driver and data latch - holds segment states during column scanning and responds to new patterns on CLK edges. Use Value: Reduces MCU I/O usage by 8× versus direct GPIO control; eliminates flicker via latch-retained brightness during refresh cycles. | Use Scenario: Controlling status LEDs, fault indicators, or pilot lights on PLC I/O modules or HMI panels. IC Role / Device Role / Timing Role: High-voltage interface buffer - translates 5 V logic signals into 12–24 V LED drive with current limiting via external resistors. Use Value: Enables direct connection to standard industrial LED types without discrete transistor stages or voltage translation circuitry. |
| Relay Driver Interface | Small-Signal Solenoid Control |
Use Scenario: Activating 5–24 V DC coil relays in automation cabinets or test equipment. IC Role / Device Role / Timing Role: Current-sinking switch - provides controlled turn-on/turn-off of relay coils using latched control bits and hardware reset. Use Value: Prevents unintended relay actuation during MCU boot or reset via CLR pin; supports fail-safe deactivation independent of firmware state. | Use Scenario: Driving miniature solenoids in vending machines, medical devices, or precision fluid valves. IC Role / Device Role / Timing Role: Precision current sink - delivers repeatable 20–40 mA drive pulses with fast turn-off (tPHL ≤ 250 ns) to minimize mechanical bounce. Use Value: Ensures consistent solenoid stroke timing and reduces thermal stress on coil windings via defined current limits and low VOL (0.55 V max). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit open-collector latch driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS273N | 8-bit D flip-flop with push-pull outputs (not open-collector); max VO = VCC = 5.5 V; no 24 V capability | Only suitable for 5 V loads; requires external transistors for >5 V LED/relay drive | Select if driving only 5 V logic-level loads and latch timing is more critical than voltage headroom |
| ULN2803APG | 8-channel Darlington array; no latch; TTL/CMOS compatible inputs; 500 mA per channel; slower switching (tOFF ≈ 250 μs) | Unlatched - requires continuous MCU output assertion; better for high-current but low-speed loads | Select when driving higher-current relays (>100 mA) and latch functionality is unnecessary |
Compared with SN74LS273N and ULN2803APG, the TLC59212IN uniquely combines latch retention, 24 V open-collector outputs, and 40 mA per channel in a single 20-pin PDIP - making it optimal for stable, mixed-voltage indicator systems where MCU resource conservation and hardware-level reset are required.
Availability
TLC59212IN is available at Aetrix Electronics and suitable for LED display multiplexing, industrial indicator arrays, relay driver interfaces, small-signal solenoid control, and embedded status lighting requiring stable component supply and long-term industrial-grade availability.
Supply support for TLC59212IN 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The TLC59212IN belongs to TI's legacy logic and interface driver product line, engineered specifically for robust, latch-based high-voltage digital output expansion in space-constrained industrial control and display applications.
FAQ
What is the maximum output voltage the TLC59212IN can safely switch?
The TLC59212IN supports up to 24 V at its Y1–Y8 open-collector outputs. This rating is specified under recommended operating conditions and verified per absolute maximum ratings (VO = 30 V non-operational limit). When driving LEDs or relays, ensure the external pull-up voltage (VLED) does not exceed 24 V for reliable long-term operation. The device maintains this rating across its full –40°C to +85°C temperature range.
Does the TLC59212IN require external current-limiting resistors for LED loads?
Yes, the TLC59212IN requires external series resistors for each LED load. Its outputs are open-collector sinks - they pull the LED cathode to GND but do not regulate current. The resistor value is calculated using VLED − VL − VOL, where VL is LED forward voltage and VOL is the output saturation voltage (≤0.55 V at 40 mA). For example, with VLED = 5 V, VL = 2.4 V, and VOL = 0.35 V, a 55 Ω resistor sets ILED ≈ 40 mA. The TLC59212IN itself does not provide constant-current regulation.
Can the TLC59212IN operate with a 3.3 V microcontroller interface?
No - the TLC59212IN is designed for 5 V operation only. Its input thresholds (Vt+ = 3.5 V, Vt− = 1.5 V) and recommended VCC range (4.5 V to 5.5 V) require a 5 V logic supply. A 3.3 V MCU cannot reliably meet the VIH minimum (≥3.5 V) without level-shifting. Direct connection risks metastability or incomplete latch triggering. Use a TI SN74LVC4245 or similar bidirectional level shifter if interfacing with 3.3 V systems.
How does the CLR pin function in the TLC59212IN?
The CLR pin on the TLC59212IN is an asynchronous, active-low direct clear input. When pulled low, it forces all eight Y outputs into high-impedance (OFF) state immediately - independent of CLK timing or D-input states. This provides hardware-level fail-safe shutdown. Pulling CLR high restores normal operation, and subsequent CLK edges resume latching of D1–D8 data. No internal pull-up exists; an external 10 kΩ pull-up to VCC is recommended for default-enable behavior.
Is the TLC59212IN pin-compatible with other TI 20-pin latch drivers like the TLC5916 or TLC5928?
No - the TLC59212IN is not pin-compatible with TLC5916 or TLC5928. While all are 20-pin drivers, their pinouts differ significantly: TLC5916 uses SPI interface with SDI/SCLK/LE pins; TLC5928 has different power pin locations (VCC at Pin 1, GND at Pin 20) and lacks dedicated CLR. The TLC59212IN places CLR at Pin 1, GND at Pin 11, and VCC at Pin 20 - matching only the TLC59211 and TLC59213 in its family. Always verify pin mapping before PCB layout reuse.
TLC59212IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Master Reset
- Type:
- D-Type
- Output Type:
- Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- 210ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- -, 40mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Quiescent (Iq):
- 5 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
TLC59212IN FAQ
1.How can I place an order for TLC59212IN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC59212IN 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 TLC59212IN reliable?
The price and inventory of TLC59212IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC59212IN is usually 5 days.
3.What payment methods are accepted for TLC59212IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC59212IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC59212IN?
TLC59212IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC59212IN 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 TLC59212IN?
For technical support, including TLC59212IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC59212IN requirements.
6.How does Aetrix verify that TLC59212IN is sourced from the original manufacturer or authorized distributors?
All TLC59212IN 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 TLC59212IN meets industry standards.
7.What is the process for return or replacement of TLC59212IN?
All TLC59212IN units undergo pre-shipment inspection (PSI). If there is an issue with TLC59212IN, 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 TLC59212IN part is unused and in its original packaging.
Return procedure for TLC59212IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC59212IN Tags
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