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Renesas 74LS112FPEL-E
- Part No.:
- 74LS112FPEL-E
- Manufacturer:
- Renesas
- Category:
- Flip Flops
- Package:
- -
- Datasheet:
-
74LS112FPEL-E.pdf
- Description:
- DUAL JK FLIP-FLOP, SET AND RESET
- Quantity:
- Payment:
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Inventory:8,000
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Product details
Overview
74LS112FPEL-E from Renesas Electronics is a dual J-K negative-edge-triggered flip-flop with independent preset and clear inputs, operating at 5 V supply, supporting up to 30 MHz clock frequency, with propagation delays as low as 11 ns (tPLH) and 15 ns (tPHL), used in synchronous logic control, state machines, and digital counters.
For engineers reviewing the 74LS112FPEL-E datasheet, 74LS112FPEL-E pinout, 74LS112FPEL-E application, or 74LS112FPEL-E equivalent, this device serves as a foundational building block for edge-sensitive sequential logic in industrial control panels, test equipment timing circuits, and legacy TTL-based data path synchronization where deterministic negative-edge behavior and asynchronous set/reset are required.
Technical Context
The 74LS112FPEL-E implements two independent J-K flip-flops in a single SOP-16 package, each with separate clock (CK), J, K, preset (PR), and clear (CLR) inputs, and complementary Q/Q̅ outputs. Its negative-edge triggering ensures state changes only on the falling edge of CK, decoupling sampling from high-level noise.
All inputs meet LS-TTL voltage thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V), and outputs drive standard TTL loads (IOL = 8 mA, VOL ≤ 0.4 V). The device operates across –20°C to +75°C and supports guaranteed 30 MHz maximum clock frequency under recommended conditions (VCC = 4.75–5.25 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | 74LS (Low-power Schottky TTL), ensuring compatibility with legacy 5 V TTL systems and predictable fan-out. |
| Supply Voltage | 4.75–5.25 V - tight regulation required; operation outside this range risks undefined output states or latch-up. |
| Max Clock Frequency | 30 MHz - defines maximum synchronous state update rate for reliable operation in counter or shift-register designs. |
| tPLH/tPHL | 11/15 ns (typ.) - determines minimum clock-to-output delay for timing budgeting in pipeline stages. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - enables robust interfacing with CMOS outputs and other LS devices without level-shifting. |
| Output Drive | IOL = 8 mA, IOH = –400 µA - supports direct driving of up to 20 standard TTL inputs (fan-out = 20). |
| Operating Temperature | –20°C to +75°C - suitable for commercial and industrial environments excluding automotive or extended-temp applications. |
Pinout & Package
SOP-16 (JEITA package code PRSP0016DH-B, Renesas abbreviation FP), surface-mount, 1.27 mm pitch, 5.5 mm × 10.06 mm body size, Ni/Pd/Au-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 14, 15 | Inputs (1J, 1K, 1PR, 1CLR, 2J, 2K, 2PR, 2CLR, 2CK) | Asynchronous control (PR/CLR) and synchronous data (J/K) inputs for each flip-flop; all active-low except J/K. |
| 8 | GND | Signal and power reference ground; must be low-impedance connection to minimize switching noise coupling. |
| 9, 10, 11, 12, 13 | Outputs (2Q, 2Q̅, 1Q̅, 1Q, 1CK) | Complementary Q/Q̅ outputs per section; 1CK is shared clock input for first flip-flop (pin 13), 2CK for second (pin 12). |
| 16 | VCC | +5 V supply rail; requires local 0.1 µF ceramic decoupling capacitor placed within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent J-K flip-flops | Enables compact implementation of two-bit registers or toggle dividers without external gating or interconnect. |
| Negative-edge clock triggering | Eliminates metastability risk from asynchronous high-level noise on clock line; simplifies timing analysis in synchronous designs. |
| Asynchronous preset and clear | Allows immediate initialization or reset of each flip-flop regardless of clock state-critical for power-on sequencing and fault recovery. |
| LS-TTL compatible I/O | Guarantees interoperability with 74LS, 74ALS, and 74F families without interface buffers or level translators. |
| 30 MHz max clock frequency | Supports real-time control loops and data acquisition sampling rates up to 15 MHz per stage in cascaded configurations. |
Applications
| Industrial Control Logic | Test Equipment Timing |
|---|---|
|
Use Scenario: Synchronizing relay actuation signals in programmable logic controller (PLC) I/O modules where deterministic edge-triggered state updates prevent spurious transitions. IC Role / Device Role / Timing Role: Dual J-K flip-flop providing synchronized latching of sensor inputs and generation of timed output pulses for solenoid drivers. Use Value: Negative-edge triggering ensures immunity to clock-line ringing during high-noise factory floor operation, reducing false triggers by >95% versus positive-edge alternatives. |
Use Scenario: Generating precise, jitter-controlled clock dividers and pattern generators inside automated test equipment (ATE) for semiconductor wafer probing. IC Role / Device Role / Timing Role: Configured as toggle (J=K=1) or synchronous counter stages to produce sub-harmonic clocks and test stimulus waveforms. Use Value: 11 ns tPLH enables <10 ns timing resolution in 100 MHz-equivalent test vectors when cascaded with minimal skew. |
| Digital Counter Circuits | Legacy System Data Path Sync |
|
Use Scenario: Building decade counters and modulo-N counters in instrumentation front-ends where discrete logic replaces microcontroller GPIO for deterministic latency. IC Role / Device Role / Timing Role: J-K flip-flops wired in ripple or synchronous configuration to implement binary or BCD counting sequences. Use Value: Asynchronous preset/clear allows instant zero-reset on overflow detection without waiting for next clock edge-critical for real-time event capture. |
Use Scenario: Interfacing between legacy 8-bit microprocessors (e.g., Z80, 8085) and modern peripherals requiring handshake signal synchronization. IC Role / Device Role / Timing Role: Latching address strobes and data valid signals to align bus timing across mixed-speed subsystems. Use Value: LS-TTL-compatible thresholds and 8 mA sink capability enable direct connection to microprocessor control buses without additional drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual J-K flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LS112N | DIP-16 package; identical electrical specs but through-hole mounting and higher thermal resistance (θJA ≈ 65°C/W vs. SOP's 120°C/W). | Preferred for prototyping, breadboarding, or repair of legacy DIP-based PCBs; unsuitable for high-density SMT production. | Select SN74LS112N only when board layout or service requirements mandate through-hole assembly. |
| 74HC112D | CMOS family (2–6 V supply), lower ICC (4 µA typ.), but VIH/VIL incompatible with TTL; no guaranteed 5 V drive into TTL loads. | Used in battery-powered or mixed-voltage systems; requires level-shifting or pull-ups to interface with 74LS logic. | Choose 74HC112D only when supply flexibility or ultra-low static power is prioritized over drop-in TTL compatibility. |
Compared with SN74LS112N and 74HC112D, the 74LS112FPEL-E delivers verified LS-TTL interoperability in space-constrained SMT layouts while maintaining full functional equivalence to industry-standard 74LS112 logic behavior-making it the optimal choice for volume-manufactured industrial electronics requiring proven reliability and zero redesign effort.
Availability
74LS112FPEL-E is available at Aetrix Electronics and suitable for industrial control logic, test equipment timing, and digital counter circuits requiring stable component supply, long-term obsolescence management, and JEDEC-compliant SOP-16 sourcing.
Supply support for 74LS112FPEL-E 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The 74LS112FPEL-E belongs to Renesas' legacy TTL logic product line, designed specifically to support long-lifecycle industrial equipment upgrades and backward-compatible replacements for discontinued 74-series components.
FAQ
What is the maximum clock frequency supported by the 74LS112FPEL-E?
The 74LS112FPEL-E supports a maximum clock frequency of 30 MHz under recommended operating conditions (VCC = 4.75–5.25 V, TA = –20°C to +75°C). This value is guaranteed by Renesas' switching characteristics table and validated across production lots. Exceeding 30 MHz may result in setup/hold violations or metastability. The 74LS112FPEL-E achieves this performance using low-power Schottky TTL circuitry optimized for speed-power trade-offs typical of mid-1980s logic design.
Does the 74LS112FPEL-E support both synchronous and asynchronous operation?
Yes, the 74LS112FPEL-E supports fully asynchronous preset and clear inputs (active-low), which override clock and J/K states to force Q = H or Q = L immediately. Its clocked J-K functionality is strictly synchronous and negative-edge-triggered. This dual-mode behavior makes the 74LS112FPEL-E suitable for applications requiring both immediate state initialization (e.g., power-on reset) and precise edge-controlled sequencing (e.g., counter advancement).
What is the package type and lead finish of the 74LS112FPEL-E?
The 74LS112FPEL-E uses an SOP-16 package (JEITA code PRSP0016DH-B, Renesas abbreviation FP) with 1.27 mm pitch, 5.5 mm × 10.06 mm body dimensions, and Ni/Pd/Au-plated leads. This RoHS-compliant surface-mount package enables high-density PCB layouts and reflow soldering compatibility. The "EL" suffix indicates tape-and-reel packaging (2,000 pcs/reel), confirming its suitability for automated SMT assembly lines handling the 74LS112FPEL-E.
Can the 74LS112FPEL-E directly drive standard TTL loads?
Yes, the 74LS112FPEL-E can directly drive standard TTL loads: its outputs deliver IOL = 8 mA (sinking) and IOH = –400 µA (sourcing) at VCC = 4.75 V, meeting the input current requirements of up to 20 standard TTL inputs (fan-out = 20). This eliminates need for buffer stages in most 74LS-system designs. The 74LS112FPEL-E maintains VOH ≥ 2.7 V and VOL ≤ 0.4 V under these load conditions, ensuring noise margins exceed 0.4 V.
Is the 74LS112FPEL-E pin-compatible with other 74LS112 variants?
Yes, the 74LS112FPEL-E shares identical pinout and logic function with all HD74LS112 family members-including HD74LS112P (DIP-16) and HD74LS112RPEL (SOP-16 JEDEC variant)-as confirmed by Renesas' official pin arrangement diagram and function table. All variants use the same 16-pin assignment for VCC, GND, CK, J, K, PR, CLR, Q, and Q̅ signals. The 74LS112FPEL-E differs only in package outline (JEITA SOP) and taping specification, not electrical or mechanical pin mapping.
74LS112FPEL-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Type:
- -
- Output Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Clock Frequency:
- -
- Max Propagation Delay @ V, Max CL:
- -
- Trigger Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Current - Quiescent (Iq):
- -
- Input Capacitance:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74LS112FPEL-E FAQ
1.How can I place an order for 74LS112FPEL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LS112FPEL-E 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 74LS112FPEL-E reliable?
The price and inventory of 74LS112FPEL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LS112FPEL-E is usually 5 days.
3.What payment methods are accepted for 74LS112FPEL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LS112FPEL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LS112FPEL-E?
74LS112FPEL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LS112FPEL-E 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 74LS112FPEL-E?
For technical support, including 74LS112FPEL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LS112FPEL-E requirements.
6.How does Aetrix verify that 74LS112FPEL-E is sourced from the original manufacturer or authorized distributors?
All 74LS112FPEL-E 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 74LS112FPEL-E meets industry standards.
7.What is the process for return or replacement of 74LS112FPEL-E?
All 74LS112FPEL-E units undergo pre-shipment inspection (PSI). If there is an issue with 74LS112FPEL-E, 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 74LS112FPEL-E part is unused and in its original packaging.
Return procedure for 74LS112FPEL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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