74LCX125_V01 STMICROELECTRONICS | Alldatasheet
Document overview
- Manufacturer or author: Provided By alldatasheet.com(free datasheet download site)
- PDF pages: 16
Technical content
Datasheet sections
- 1 Logic symbols and I/O equivalent circuit
- 2 Pin settings
- 2.1 Pin connections
- 2.2 Pin description
- 2.3 Truth table
- 3 Maximum ratings
- 4 Electrical characteristics
- 5 Test circuit
- 6 Waveforms
- 7 Package information
- 8 Revision history
Features
■ 5 V tolerant inputs and outputs ■ High speed –t PD = 5.2 ns (max.) at VCC = 3 V ■ Power-down protection on inputs and outputs ■ Symmetrical output impedance –| I OH| = IOL = 24 mA (min.) at V CC = 3 V ■ PCI bus levels guaranteed at 24 mA ■ Balanced propagation delay –t PLH ≅ tPHL ■ Operating voltage range –V CC (opr.) = 2.0 V to 3.6 V ■ Pin and function compatible with 74 series 125 ■ Latch-up performance exceeds 500 mA (JESD 17) ■ ESD performance – HBM: 2000 V (MIL STD 883 method 3015) – MM: 200 V – CDM: 1000 V
Applications
■ Automotive ■ Industrial ■ Computer ■ Consumer
Description
The 74LCX125 device is a low-voltage CMOS quad bus buffer manufactured with sub-micron silicon gate and double-layer metal wiring C 2MOS technology. It is ideal for low-power and high- speed 3.3 V applications and can be interfaced to a 5 V signal environment for both inputs and outputs. The device requires the 3-state control input G to be set high to place the output in the high impedance state. It has the same speed performance at 3.3 V as the 5 V AC/ACT family, combined with lower power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2 kV ESD immunity and transient excess voltage. TSSOP14 SO-14 Table 1. Device summary
- Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC
Q001 and Q002 or equivalent.
1 Logic symbols and I/O equivalent circuit
Figure 1. IEC logic symbols Figure 2. Input and output equivalent circuit
2 Pin settings
2.1 Pin connections
Figure 3. Pin connections (top through view)
2.2 Pin description
2.3 Truth table
Table 2. Pin description
7 GND Ground (0 V)
14 V CC Positive supply voltage
Table 3. Truth table
3 Maximum ratings
rating conditions for extended periods may affect device reliability. Table 4. Absolute maximum ratings
- I O absolute maximum rating must be observed.
Table 5. Recommended operating conditions
- Truth table guaranteed: 1.5 V to 3.6 V.
4 Electrical characteristics
Table 6. DC specifications Table 7. Dynamic switching characteristics
- Number of outputs defined as “n”. Measured with “n-1” outputs switching from HIGH to LOW or LOW to
HIGH. The remaining output is measured in the LOW state.
3.3 CL = 50 pF
Table 8. AC electrical characteristics
- Skew is defined as the absolute value of the difference between the actual propagation delay for any two
- Parameter guaranteed by design.
Table 9. Capacitive characteristics
- C PD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the
be obtained by the following equation. I CC(opr) = CPD x VCC x fIN + ICC/4 (per gate).
5 Test circuit
Figure 4. Test circuit RT = ZOUT of pulse generator (typically 50 Ω ). Table 10. Test circuit
6 Waveforms
Figure 5. Propagation delay (f = 1 MHz; 50% duty cycle) Figure 6. Output enable and disable time (f = 1 MHz; 50% duty cycle)
Package information 74LCX125 10/16 Doc ID 4980 Rev 8
7 Package information
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark.
Figure 7. SO-14 package outline Table 11. SO-14 package mechanical data
Figure 8. TSSOP14 package outline Table 12. TSSOP14 package mechanical data
Figure 9. Tape and reel SO-14 outline Table 13. Tape and reel SO-14 mechanical data
Figure 10. Tape and reel TSSOP14 outline Table 14. Tape and reel TSSOP14 mechanical data
8 Revision history
Table 15. Document revision history temperature range and note 1. Updated Section 3: Maximum ratings (added cross-references). Removed “Operating temperature” from Table 5. Reformatted Section 7: Package information. Minor corrections throughout document.