CD40161B-MIL - CMOS Sync 4-Bit Counter | Texas Instruments
MPN: CD40161B-MIL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.5 | $7,500.00 |
Drop-in alternatives for CD40161B-MIL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CD40161B
✅ Drop-In📋 Reference alternative (not in catalog)
CD40161BE
✅ Drop-In📋 Reference alternative (not in catalog)
CD40161BDR
✅ Drop-In📋 Reference alternative (not in catalog)
CD40161BMT
✅ Drop-In📋 Reference alternative (not in catalog)
74LS161AN
✅ Drop-In📋 Reference alternative (not in catalog)
CD40161BMS
✅ Drop-In📋 Reference alternative (not in catalog)
CD40161B-MIL Maximum Ratings & Electrical Characteristics
| Function | Synchronous Programmable 4-Bit Binary Counter with Asynchronous Clear |
| Supply Voltage Range | 3 V to 18 V |
| Operating Temperature Range | -55°C to +125°C |
| Package Type | 16-lead hermetic dual-in-line ceramic (F3A) |
| Propagation Delay (tpd) | 160 ns typical at 5V |
| Maximum Clock Frequency | 5.5 MHz at 5V |
| Output Drive Capability | 1 LSTTL load |
| Input Capacitance | 5 pF typical |
| Quiescent Current (IDD) | 0.04 µA typical at 5V |
| High-Level Output Current (IOH) | -0.4 mA at 5V |
| Low-Level Output Current (IOL) | 0.4 mA at 5V |
| Logic Family | CD4000 |
| Number of Bits | 4 |
| Clear Type | Asynchronous |
| RoHS Status | Compliant |
CD40161B-MIL Pin Configuration
| Pin 1 | P1 — Parallel data input 1 |
| Pin 2 | P2 — Parallel data input 2 |
| Pin 3 | P3 — Parallel data input 3 |
| Pin 4 | P4 — Parallel data input 4 |
| Pin 5 | PE — Parallel enable (active low) |
| Pin 6 | Q4 — Output 4 |
| Pin 7 | Q3 — Output 3 |
| Pin 8 | VSS — Ground |
| Pin 9 | Q2 — Output 2 |
| Pin 10 | Q1 — Output 1 |
| Pin 11 | CLK — Clock input (rising edge triggered) |
| Pin 12 | CLR — Asynchronous clear (active low) |
| Pin 13 | TE — Count enable (active low) |
| Pin 14 | CO — Carry output |
| Pin 15 | VDD — Positive supply |
| Pin 16 | NC — No connection |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
CD40161B-MIL is suitable for 6 applications: Frequency Divider, Digital Timer, Event Counter, State Machine, Test and Measurement, Aerospace and Defense.
Frequency Divider
The CD40161B-MIL can be used as a frequency divider in communication systems and test equipment. Its synchronous operation ensures glitch-free division, and the carry output allows cascading to achieve higher division ratios. For example, cascading two CD40161B-MIL counters can divide by up to 256. The wide supply voltage range (3V to 18V) makes it compatible with various logic levels. The military temperature range ensures reliable operation in harsh environments.
Recommended
Digital Timer
In industrial timers, the CD40161B-MIL counts clock pulses to measure time intervals. Its asynchronous clear allows immediate reset, and the programmable inputs enable setting a preset count. The counter's output can drive a display or trigger a relay. The low quiescent current (0.04 µA) is beneficial for battery-powered timers. The wide operating temperature range makes it suitable for outdoor industrial environments.
Recommended
Event Counter
The CD40161B-MIL can count events in data acquisition systems, such as counting pulses from sensors. Its synchronous design prevents metastability issues, and the carry output allows expansion to 8, 12, or more bits. The device's high noise immunity (CMOS) ensures reliable counting in electrically noisy environments. The military temperature range is ideal for aerospace and defense applications where reliability is critical.
Recommended
State Machine
The CD40161B-MIL can be used to implement simple state machines in control systems. By using the parallel load inputs, the counter can be preset to any state, and the outputs can be decoded to generate control signals. The asynchronous clear provides a reliable reset mechanism. The device's low power consumption is advantageous in portable equipment. The wide supply range allows interfacing with both 5V and 3.3V logic.
Recommended
Test and Measurement
In test equipment, the CD40161B-MIL is used in signal generators and counters. Its precise synchronous counting ensures accurate frequency measurement. The carry output enables cascading for extended range. The device's wide operating temperature range and hermetic package make it suitable for benchtop and field instruments. The low propagation delay (160ns) allows high-speed counting up to 5.5MHz.
Recommended
Aerospace and Defense
The CD40161B-MIL is specifically designed for military and aerospace applications. Its hermetic ceramic package and -55°C to +125°C temperature range ensure operation in extreme conditions. The device is used in avionics for timing and counting functions. Its CMOS technology provides low power consumption, critical for satellite and UAV systems. The device is also radiation-tolerant, making it suitable for space applications.
Recommended
Recommended Products Summary
Engineering reference data for CD40161B-MIL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CD40161B | CD40161BE | CD40161BDR | CD40161BMT | 74LS161AN | CD40161BMS |
|---|---|---|---|---|---|---|---|
| Package | 16-pin ceramic DIP (F3A) | 16-pin DIP (E) | 16-pin DIP (E) | 16-pin SOIC (NSR) | 16-pin TSSOP (PW) | 16-pin DIP | 16-pin ceramic DIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi | Renesas Electronics |
| Supply Voltage Range | 3V to 18V | 3V to 18V | 3V to 18V | 3V to 18V | 3V to 18V | 4.75V to 5.25V | 3V to 18V |
| Operating Temperature Range | -55°C to +125°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | -55°C to +125°C |
| Maximum Clock Frequency | 5.5 MHz at 5V | 5.5 MHz at 5V | 5.5 MHz at 5V | 5.5 MHz at 5V | 5.5 MHz at 5V | 25 MHz | 5.5 MHz at 5V |
| Propagation Delay | 160 ns at 5V | 160 ns at 5V | 160 ns at 5V | 160 ns at 5V | 160 ns at 5V | 18 ns | 160 ns at 5V |
| Clear Type | Asynchronous | Asynchronous | Asynchronous | Asynchronous | Asynchronous | Asynchronous | Asynchronous |
| Logic Family | CMOS | CMOS | CMOS | CMOS | CMOS | TTL | CMOS |
Key Differentiators
- Military temperature range and hermetic ceramic package (vs CD40161B)
- Pin-compatible with TTL 74LS161 (vs 74LS161AN)
- Wide supply voltage range (vs 74LS161AN)
Design Notes
Decouple the VDD pin with a 0.1µF ceramic capacitor placed as close to the pin as possible. For high-frequency noise, add a 10µF electrolytic capacitor in parallel. The CD40161B-MIL operates from 3V to 18V, but ensure the supply is stable and within the recommended range to avoid erratic counting.
Keep the clock input trace short and avoid routing it near high-current switching signals. Use a ground plane to minimize noise. The CLR input is asynchronous and active low; if not used, tie it to VDD to prevent accidental resets. Similarly, tie TE (count enable) to VSS when counting is always enabled.
Ensure the clock signal has a fast rise time (< 100ns) to avoid double counting. If the clock source is slow, use a Schmitt trigger buffer. Also, avoid floating inputs; all unused inputs should be tied to VDD or VSS. The carry output (CO) can be used to cascade counters, but ensure proper timing to avoid glitches.
Compliance Information
RoHS compliant per TI product page. Military-grade device, not AEC-Q100 qualified.
