CD74HC377PWRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
CD74HC377PWRE4 is an 8-bit D-type flip-flop register from Texas Instruments in the HC/UH logic family, featuring a common clock enable (hold mode) for selective latching of 8 parallel data inputs. Operates at up to 20 MHz clock frequency with 4 mA output drive current and 50 pF load capacitance rating, suitable for data bus buffering and output port expansion. Available in automotive-grade TSSOP-20 tape-and-reel packaging for high-reliability production.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC377PWRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC377PWRE4?
- 8-bit parallel D flip-flop with common clock enable (hold mode) allows selective data capture without requiring external gating logic
- 20 MHz maximum operating frequency with HC/UH family noise immunity suits medium-speed data bus and output latch applications
- TSSOP-20 package with 4 mA output drive current (IOL) enables direct LED or bus line driving in space-constrained digital designs
What is CD74HC377PWRE4 used for?
The CD74HC377PWRE4 is used as an output port expander and data bus latch in microcontroller and FPGA peripheral designs, where 8 parallel data bits must be captured on a clock edge and held stable between updates. Its hold-mode clock enable is particularly useful in memory-mapped I/O architectures where the latch must retain its state while the data bus serves other devices, and the TSSOP-20 package saves board area in densely populated control boards.
What are the specifications of CD74HC377PWRE4?
| YTEOL | 0 |
| Additional Feature | WITH HOLD MODE |
| Family | HC/UH |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | D FLIP-FLOP |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.004A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 53ns |
| Propagation Delay (tpd) | 265ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 23MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Where can I find the CD74HC377PWRE4 datasheet?
CD74HC377PWRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC377PWRE4?
Compatible alternatives and drop-in replacements for CD74HC377PWRE4:
Flip-Flop, HC Series, 8-Func, Positive Edge Triggered, 8-Bit, True Output, CMOS, PDSO20
Frequently Asked Questions
How does the clock enable (hold mode) of CD74HC377PWRE4 simplify output port design compared to a simple D flip-flop array?
The active-low clock enable (E) input on CD74HC377PWRE4 allows all 8 flip-flops to ignore clock edges when E is high, effectively freezing the output state without requiring external AND gates on each clock line. This built-in hold mode reduces the gate count and routing complexity in output port expander designs, saving at least one 8-input AND gate package and the associated propagation delay compared to gating the clock externally with a discrete 74HC08.
At 20 MHz operating frequency, what is the maximum propagation delay of CD74HC377PWRE4, and how does that affect timing margins?
CD74HC377PWRE4 is rated for up to 20 MHz at 50 pF load with a typical propagation delay of approximately 10 ns to 15 ns from clock rising edge to Q output at 5 V supply. In a 20 MHz system with a 50 ns clock period, this leaves roughly 35 ns of timing margin for setup and hold requirements of downstream logic, which is adequate for most 3.3 V and 5 V bus interfaces. Derate the maximum frequency to approximately 12 MHz at 3.3 V supply to maintain equivalent timing margins.
Can CD74HC377PWRE4 directly drive LEDs or resistive loads from its outputs at 4 mA current sink?
With a maximum output low current (IOL) of 4 mA, each output of CD74HC377PWRE4 can sink sufficient current to drive a standard LED with a 330-ohm series resistor from 5 V, resulting in approximately 10 mA forward current — which exceeds the 4 mA rated limit. For safe LED driving without exceeding IOL, use a 680-ohm to 1 kohm series resistor to limit sink current below 4 mA, or buffer the output with a dedicated LED driver capable of 20 mA to 40 mA per channel.
How does CD74HC377PWRE4 fit into a microcontroller output expansion design with address-decoded chip selects?
In an address-decoded output expansion scheme, the active-low write strobe from the microcontroller address decoder connects to the CD74HC377PWRE4 clock input, while the E pin ties to ground to always enable clocking. The 8 data bus lines connect to the D inputs, and the decoded chip select pulse latches the data into the flip-flops in a single 50 ns write cycle. Multiple CD74HC377PWRE4 devices can expand to 16, 24, or 32 parallel output bits by assigning each its own decode address, sharing the same 8-bit data bus.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit