74AHC1G4208GWH

74AHC1G4208 8-stage divider and oscillator Rev. 3 11 January 2022 Product data sheet 1. General description 74AHC1G4208 is a 8-stage divider and oscillator. It consists of a chain of 8 flip-flops. Each flip-flop divides the frequency of the previous flip-flop by two, consequently the 74AHC1G4208 counts 8 up to 2 = 256. 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 256. 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 Latch-up performance exceeds 100 mA per JESD 78 Class II ESD protection: HBM: ANSI/ESDA/Jedec JS-001 exceeds 2000 V CDM: ANSI/ESDA/Jedec JS-002 exceeds 1000 V Specified from -40 C to +85 C and from -40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74AHC1G4208GW -40 C to +125 C TSSOP5 plastic thin shrink small outline package 5 leads SOT353-1 body width 1.25 mm 4. Marking Table 2. Marking codes Type number Marking 1 74AHC1G4208GW C5 1 The pin 1 indicator is located on the lower left corner of the device, below the marking code.Nexperia 74AHC1G4208 8-stage divider and oscillator 5. Functional diagram X2 X1 Q FF1 FF2 FF8 1 4 D D D 8-STAGE X2 COUNTER X1 CP CP CP 2 Q1 Q2 Q8 Q aaa-029845 aaa-029846 Fig. 1. Logic symbol Fig. 2. Logic diagram 6. Pinning information 6.1. Pinning 74AHC1G4208 X1 1 5 V CC X2 2 GND 3 4 Q aaa-029847 Fig. 3. Pin configuration SOT353-1 (TSSOP5) 6.2. Pin description Table 3. Pin description Symbol Pin Description X1 1 clock input/oscillator pin X2 2 oscillator pin GND 3 ground (0 V) Q 4 divider output V 5 supply voltage CC 7. Functional description 1 2 4 8 16 32 64 128 256 512 768 1024 1280 1536 1792 X1 Q aaa-029848 Fig. 4. Timing diagram 74AHC1G4208 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2022. All rights reserved Product data sheet Rev. 3 11 January 2022 2 / 11