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74HC1G126GV-74HCT1G126GW
Bus buffer/line driver; 3-state
General descriptionThe 74HC1G126 and 74HCT1G126 are high-speed, Si-gate CMOS devices. They
provide one non-inverting buffer/line driver with 3-state output. The 3-state output is
controlled by the output enable input pin (OE). A LOW at pin OE causes the output as
assume a high-impedance OFF-state.
The HC device has CMOS input switching levels and supply voltage range 2 V to 6 V.
The HCT device has TTL input switching levels and supply voltage range 4.5 V to 5.5 V.
The bus driver output currents are equal to those of the 74HC126 and 74HCT126.
Features Symmetrical output impedance High noise immunity Low power dissipation Balanced propagation delays SOT353-1 and SOT753 package options
Ordering information Marking
74HC1G126; 74HCT1G126
Bus buffer/line driver; 3-state
Rev. 04 — 20 July 2007 Product data sheet
Table 1. Ordering information74HC1G126GW −40 °C to +125°C TSSOP5 plastic thin shrink small outline package; 5 leads;
body width 1.25 mm
SOT353-1
74HCT1G126GW
74HC1G126GV −40 °C to +125°C SC-74A plastic surface-mounted package; 5 leads SOT753
74HCT1G126GV
Table 2. Marking codes74HC1G126GW HN
74HCT1G126GW TN
74HC1G126GV H26
74HCT1G126GV T26
NXP Semiconductors 74HC1G126; 74HCT1G126
Bus buffer/line driver; 3-state Functional diagram Pinning information
6.1 Pinning
6.2 Pin description Functional description
Table 3. Pin description 1 output enable input 2 data input
GND 3 ground (0V) 4 data output
VCC 5 supply voltage
Table 4. Function table= HIGH voltage level; L= LOW voltage level; X= don’t care; Z= high-impedance OFF-state L
HHH Z
NXP Semiconductors 74HC1G126; 74HCT1G126
Bus buffer/line driver; 3-state Limiting values[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] Above 55 °C the value of Ptot derates linearly with 2.5 mW/K.
Recommended operating conditions
10. Static characteristics
Table 5. Limiting valuesIn accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).[1]
VCC supply voltage −0.5 +7.0 V
IIK input clamping current VI < −0.5 V or VI >VCC + 0.5V - ±20 mA
IOK output clamping current VO< −0.5 V or VO >VCC + 0.5V - ±20 mA output current −0.5 V < VO
ICC supply current - 70 mA
IGND ground current −70 - mA
Tstg storage temperature −65 +150 °C
Ptot total power dissipation Tamb = −40°Cto +125°C [2]- 200 mW
Table 6. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V input voltage 0 - VCC 0- VCC V output voltage 0 - VCC 0- VCC V
Tamb ambient temperature −40 +25 +125 −40 +25 +125 °C
Δt/ΔV input transition rise
and fall rate
VCC = 2.0 V - - 625 - - - ns/V
VCC = 4.5 V - - 139 - - 139 ns/V
VCC = 6.0 V - - 83 - - - ns/V
Table 7. Static characteristics
Voltages are referenced to GND (ground = 0 V). All typical values are measured at Tamb =25 °C.
For type 74HC1G126
VIH HIGH-level input
voltage
VCC = 2.0 V 1.5 1.2 - 1.5 - V
VCC = 4.5 V 3.15 2.4 - 3.15 - V
VCC = 6.0 V 4.2 3.2 - 4.2 - V
VIL LOW-level input
voltage
VCC = 2.0 V - 0.8 0.5 - 0.5 V
VCC = 4.5 V - 2.1 1.35 - 1.35 V
VCC = 6.0 V - 2.8 1.8 - 1.8 V
NXP Semiconductors 74HC1G126; 74HCT1G126
Bus buffer/line driver; 3-state
VOH HIGH-level output
voltage = VIH or VIL
IO = −20 μA; VCC = 2.0 V 1.9 2.0 - 1.9 - V
IO = −20 μA; VCC = 4.5 V 4.4 4.5 - 4.4 - V
IO = −20 μA; VCC = 6.0 V 5.9 6.0 - 5.9 - V
IO = −6.0 mA; VCC = 4.5 V 3.84 4.32 - 3.7 - V
IO = −7.8 mA; VCC = 6.0 V 5.34 5.81 - 5.2 - V
VOL LOW-level output
voltage = VIH or VIL
IO = 20 μA; VCC = 2.0 V - 0 0.1 - 0.1 V
IO = 20 μA; VCC = 4.5 V - 0 0.1 - 0.1 V
IO = 20 μA; VCC = 6.0 V - 0 0.1 - 0.1 V
IO = 6.0 mA; VCC = 4.5 V - 0.15 0.33 - 0.4 V
IO = 7.8 mA; VCC = 6.0 V - 0.16 0.33 - 0.4 V input leakage current VI =VCCor GND; VCC= 6.0V - - 1.0 - 1.0 μA
IOZ OFF-state output
current
VI = VIH or VIL; VO = VCC or
GND; VCC = 6.0 V 5 - 10 μA
ICC supply current VI =VCCor GND; IO =0A;
VCC= 6.0V - 10 - 20 μA input capacitance - 1.5 - - - pF
For type 74HCT1G126
VIH HIGH-level input
voltage
VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - V
VIL LOW-level input
voltage
VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 V
VOH HIGH-level output
voltage = VIH or VIL; VCC = 4.5 V
IO = −20μA 4.4 4.5 - 4.4 - V
IO = −6.0 mA 3.84 4.32 - 3.7 - V
VOL LOW-level output
voltage = VIH or VIL; VCC = 4.5 V
IO = 20μA - 0 0.1 - 0.1 V
IO = 6.0 mA - 0.16 0.33 - 0.4 V input leakage current VI =VCCor GND; VCC= 5.5V - - 1.0 - 1.0 μA
IOZ OFF-state output
current
VI = VIH or VIL; VO = VCC or
GND; VCC = 5.5 V 5 - 10
ICC supply current VI =VCCor GND; IO =0A;
VCC= 5.5V - 10 - 20 μA
ΔICC additional supply
current
per input; VCC= 4.5Vto 5.5V; =VCC− 2.1 V; IO =0A - 500 - 850 μA input capacitance - 1.5 - - - pF
Table 7. Static characteristics …continued
Voltages are referenced to GND (ground = 0 V). All typical values are measured at Tamb =25 °C.
NXP Semiconductors 74HC1G126; 74HCT1G126
Bus buffer/line driver; 3-state
11. Dynamic characteristics
[1] tpd is the same as tPLH and tPHL.
ten is the same as tPZL and tPZH.
tdis is the same as tPLZ and tPHZ.
[2] CPD is used to determine the dynamic power dissipation PD (μW). =CPD× VCC2×fi+∑(CL× VCC2×fo) where:= input frequency in MHz= output frequency in MHz= output load capacitance in pF
VCC= supply voltage in Volts(CL× VCC2× fo) = sum of outputs
Table 8. Dynamic characteristics
GND = 0 V; tr = tf ≤ 6.0 ns; CL=50 pF unless otherwise specified. All typical values are measured at Tamb =25 °C. For test
circuit see Figure7
For type 74HC1G126
tpd propagation delayAto Y; see Figure5 [1]
VCC = 2.0 V - 24 125 - 150 ns
VCC = 4.5 V - 10 25 - 30 ns
VCC = 5.0 V; CL =15pF - 9 - - - ns
VCC = 6.0 V - 9 21 - 26 ns
ten enable time OEto Y; see Figure6 [1]
VCC = 2.0 V - 24 155 - 190 ns
VCC = 4.5 V - 10 31 - 38 ns
VCC = 6.0 V - 8 26 - 32 ns
tdis disable time OEto Y; see Figure6 [1]
VCC = 2.0 V - 16 155 - 190 ns
VCC = 4.5 V - 12 31 - 38 ns
VCC = 6.0 V - 11 26 - 32 ns
CPD power dissipation
capacitance= GNDto VCC [2] -30- - - pF
For type 74HCT1G126
tpd propagation delayAto Y; see Figure5 [1]
VCC = 4.5 V - 11 30 - 36 ns
VCC = 5.0 V; CL =15pF - 10 - - - ns
ten enable time OEto Y; see Figure 6; VCC = 4.5 V [1] - 10 35 - 42 ns
tdis disable time OEto Y; see Figure 6; VCC = 4.5 V [1] - 12 31 - 38 ns
CPD power dissipation
capacitance= GNDto VCC− 1.5V [2] -27- - - pF
NXP Semiconductors 74HC1G126; 74HCT1G126
Bus buffer/line driver; 3-state
12. Waveforms
Table 9. Measurement points
74HC1G126 0.5 × VCC GND to VCC 0.5 × VCC
74HCT1G126 1.3 V GND to 3.0 V 1.3 V
