SN74LVC1G123

Part: SN74LVC1G123 — Texas Instruments

Type: Single Retriggerable Monostable Multivibrator with Schmitt-Trigger Inputs

Description: Single retriggerable monostable multivibrator for 1.65–5.5 V VCC operation, with Schmitt-trigger A/B inputs, 5.5 V tolerant inputs, and a max tpd of 8 ns at 3.3 V.

Operating Conditions:

• Supply voltage: 1.65–5.5 V (1.5 V minimum for data retention only)
• Operating temperature: -40 to 125 °C
• Input voltage: 0–5.5 V
• External timing resistance: min 5 kΩ (min 1 kΩ at the other listed condition)

Absolute Maximum Ratings:

• Max supply voltage: 6.5 V
• Max input voltage: 6.5 V
• Continuous output current: ±50 mA
• Continuous current through VCC or GND: ±100 mA
• Input/output clamp current: -50 mA
• Storage temperature: -65 to 150 °C

Key Specs:

• VOH: VCC − 0.1 V min at IOH = −100 μA (VCC = 1.65–5.5 V); 3.8 V min at IOH = −32 mA (VCC = 4.5 V)
• VOL: 0.55 V max at IOL = 32 mA (VCC = 4.5 V)
• Input leakage (A, B, CLR): ±1 μA max at VI = 5.5 V or GND
• Ioff: ±10 μA max (VI or VO = 5.5 V, VCC = 0 V)
• Quiescent ICC: 20 μA max (VCC = 5.5 V)
• Input capacitance: 3 pF typ (VCC = 3.3 V)
• Minimum trigger pulse width (A, B, CLR): 8 ns at 1.8 V, 4 ns at 2.5 V, 3 ns at 3.3 V, 2.5 ns at 5 V
• Thermal resistance RθJA: 220 °C/W (DCT), 227 °C/W (DCU), 102 °C/W (YZP)

Features:

• Available in the TI NanoFree package
• 5 V VCC operation supported, with inputs accepting up to 5.5 V
• Supports mixed-mode voltage operation and down translation to VCC
• Schmitt-trigger A and B inputs for slow input transition rates
• Edge triggered from active-high or active-low gated logic inputs
• Retriggerable for output pulses up to 100% duty cycle
• Overriding clear terminates the output pulse
• Glitch-free power-up reset on outputs
• Ioff supports live insertion, partial-power-down mode, and back-drive protection
• Latch-up performance exceeds 100 mA per JESD 78, Class II
• ESD: 2000 V HBM, 1000 V CDM

Applications:

• AV receivers
• Blu-ray players and home theaters
• DVD recorders and players
• Desktop and notebook PCs
• Digital and internet radio players
• Digital video cameras
• Embedded PCs
• GPS personal navigation devices
• Mobile internet devices
• Network attached storage
• PDAs
• Server PSU
• Solid-state drives
• Video analytics servers
• Wireless headsets, keyboards, and mice

Package:

• DCT: SSOP (8), 2.95 mm × 2.80 mm
• DCU: VSSOP (8), 2.30 mm × 2.00 mm
• YZP: DSBGA (8), 1.91 mm × 0.91 mm

• Available in the Texas Instruments NanoFree ™ Package
• Supports 5V VCC Operation
• Inputs Accept Voltages to 5.5V
• Max tpd of 8ns at 3.3V
• Supports Mixed-Mode Voltage Operation on All Ports
• Supports Down Translation to VCC
• Schmitt-Trigger Circuitry on A and B Inputs for Slow Input Transition Rates
• Edge Triggered From Active-High or Active-Low Gated Logic Inputs
• Retriggerable for Very Long Output Pulses, Up to 100% Duty Cycle
• Overriding Clear Terminates Output Pulse
• Glitch-Free Power-Up Reset on Outputs
• I off Supports Live Insertion, Partial-Power-Down Mode, and Back-Drive Protection
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
• -2000V Human-Body Model (A114-A)
• -200V Machine Model (A115-A)
• -1000V Charged-Device Model (C101)

• AV Receivers
• Blu-ray Players and Home Theaters
• DVD Recorders and Players
• Desktop PCs or Notebook PCs
• Digital Radio and Internet Radio Players
• Digital Video Cameras (DVC)
• Embedded PCs
• GPS: Personal Navigation Devices
• Mobile Internet Devices
• Network Attached Storage (NAS)
• Personal Digital Assistant (PDA)
• Server PSU
• Solid-State Drive (SSD): Client and Enterprise
• Video Analytics Servers
• Wireless Headsets, Keyboards, and Mice

SN74LVC1G123

SCES586E - JULY 2004 - REVISED MARCH 2024

3

• 2

4

5

1

• A

• VCC

• Rext /C ext

• B

• GND

• CLR

• Cext

Q

6

7

8

See mechanical drawings for dimensions.

Figure 4-1. DCT Package 8-Pin SSOP Top View

A

8

1

VCC

2 B Rext /C ext 7

CLR

6

• Cext

3

5 GND Q 4

Figure 4-2. DCU Package 8-Pin VSSOP Top View

Figure 4-3. YZP Package 8-Pin DSBGA Bottom View

Table 4-1. Pin Functions

over recommended operating free-air temperature range (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

• (2) The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
• (3) The value of VCC is provided in the Recommended Operating Conditions table.

over operating free-air temperature range (unless otherwise noted) (1)

The SN74LVC1G123 can be used for many applications. The application shown here is a switch debounce circuit. Many switches produce multiple triggers when pressed, and the debounce circuit turns the many triggers into one. This circuit takes advantage of the retrigger capability of the SN74LVC1G123 in that the output pulse length only has to be longer than the longest individual bounce (typically less than 1 ms).