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74LV245D-74LV245DB-74LV245N-74LV245PW
Octal bus transceiver 3-State
Product specification
Supersedes data of 1997 Feb 19
IC24 Data Handbook
1998 Apr 20
Philips Semiconductors Product specification
74LV245Octal bus transceiver (3-State)
FEATURES Wide operating voltage: 1.0 to 5.5 V Optimized for low voltage applications: 1.0 to 3.6 V Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V,
Tamb = 25°C Typical VOHV (output VOH undershoot) > 2 V at VCC = 3.3 V,
Tamb = 25°C Output capability: bus driver ICC category: MSI
DESCRIPTIONThe 74LV245 is a low-voltage Si-gate CMOS device and is pin and
function compatible with 74HC/HCT245.
The 74LV245 is an octal transceiver featuring non-inverting 3-State
bus compatible outputs in both send and receive directions. The
74LV245 features an output enable (OE) input for easy cascading
and a send/receive (DIR) input for direction control. OE controls the
outputs so that the buses are effectively isolated.
QUICK REFERENCE DATAGND = 0 V; Tamb = 25°C; tr = tf ≤ 2.5 ns
NOTE: CPD is used to determine the dynamic power dissipation (PD in μW)
PD = CPD VCC 2 fi (CL VCC 2 fo) where:
fi = input frequency in MHz; CL = output load capacitance in pF;
fo = output frequency in MHz; VCC = supply voltage in V;
(CL VCC2 fo) = sum of the outputs.
ORDERING INFORMATION
PIN DESCRIPTION
FUNCTION TABLE
NOTES:= HIGH voltage level= LOW voltage level= don’t care= high impedance OFF-state
Philips Semiconductors Product specification
74LV245Octal bus transceiver (3-State)
PIN CONFIGURATION
LOGIC SYMBOL (IEEE/IEC)
LOGIC SYMBOL
Philips Semiconductors Product specification
74LV245Octal bus transceiver (3-State)
RECOMMENDED OPERATING CONDITIONS
NOTE: The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to
VCC = 5.5V.
ABSOLUTE MAXIMUM RATINGS1, 2In accordance with the Absolute Maximum Rating System (IEC 134).
Voltages are referenced to GND (ground = 0V).
NOTES: Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
Philips Semiconductors Product specification
74LV245Octal bus transceiver (3-State)
DC ELECTRICAL CHARACTERISTICSOver recommended operating conditions. Voltages are referenced to GND (ground = 0V).
NOTE: All typical values are measured at Tamb = 25°C.
Philips Semiconductors Product specification
74LV245Octal bus transceiver (3-State)
AC CHARACTERISTICSGND = 0V; tr = tf ≤ 2.5ns; CL = 50pF; RL = 1KΩ
NOTES: Unless otherwise stated, all typical values are measured at Tamb = 25°C Typical values are measured at VCC = 3.3 V. Typical values are measured at VCC = 5.0 V.
AC WAVEFORMSVM = 1.5 V at VCC ≥ 2.7 V and ≤ 3.6 V
VM = 0.5 V × VCC at VCC < 2.7 V and ≥ 4.5 V
VOL and VOH are the typical output voltage drop that occur with the output load.
VX = VOL + 0.3 V at VCC ≥ 2.7 V and ≤ 3.6 V
VX = VOL + 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V
VY = VOH – 0.3 V at VCC ≥ 2.7V and ≤ 3.6 V
VY = VOH – 0.1 × VCC at VCC < 2.7 V and ≥ 4.5 V
Figure 1. Input (An, Bn) to output
(Bn, An) propagation delays and the output transition times.
Figure 2. 3-State enable and disable times.
