74AHC1G4212
12-stage divider and oscillator
Rev. 4 — 27 June 2019 Product data sheet
1. General description
74AHC1G4212 is a 12-stage divider and oscillator. It consists of a chain of 12 flip-flops. Each flip-
flop divides the frequency of the previous flip-flop by two, consequently the 74AHC1G4212 counts
up to 2
12
= 4096. The single inverting stage (X1 to X2) functions as a crystal oscillator or an input
buffer for an external oscillator. When used as a buffer the output X2 should be left floating. The
frequency of the output (Q) is the frequency applied to X1 divided by 4096. The divider advances
on the negative-going transition of X1.
The X1 input is overvoltage tolerant. This feature allows the use of this device as a voltage level
translator in mixed voltage environments.
2. Features and benefits
• Wide supply voltage range from 2.0 V to 5.5 V
• Overvoltage tolerant inputs to 5.5 V
• High noise immunity
• CMOS low power dissipation
• ESD protection:
• HBM JESD22-A114F: exceeds 2000 V
• CDM JESD22-C101E: exceeds 1000 V
• Latch-up performance exceeds 100 mA per JESD 78 Class II
• Specified from -40 °C to +85 °C and from -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
PackageType number
Temperature range Name Description Version
74AHC1G4212GW -40 °C to +125 °C TSSOP5 plastic thin shrink small outline package;
5 leads; body width 1.25 mm
SOT353-1
4. Marking
Table 2. Marking codes
Type number Marking[1]
74AHC1G4212GW C2
[1] The pin 1 indicator is located on the lower left corner of the device, below the marking code.
