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74ABT2245DB
Octal transceiver with direction pin with 30ohm series termination resistors 3-State
Product specification
Supersedes data of 1996 Sep 10 1998 Jan 16
IC23 Data Handbook
Philips Semiconductors Product specification
74ABT2245Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
FEATURES Octal bidirectional bus interface 3-State buffers Output capability: +12mA/–32mA Latch-up protection exceeds 500mA per Jedec Std 17 ESD protection exceeds 2000 V per MIL STD 833 Method 3015
and 200 V per Machine Model Power-up 3-State Live insertion/extraction permitted Same as 74ABT245-1 Outputs include series resistance of 30Ω, making external
termination resistors unnecessary Inputs are disabled during 3-State mode
DESCRIPTIONThe 74ABT2245 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed.
The 74ABT2245 device is an octal transceiver featuring
non-inverting 3-State bus compatible outputs in both send and
receive directions. The control function implementation minimizes
external timing requirements. The device features an Output Enable
(OE) input for easy cascading and a Direction (DIR) input for
direction control.
The 74ABT2245 is designed with 30Ω series resistance in both the
High and Low states of the output. This design reduces line noise in
applications such as memory address drivers, clock drivers, and bus
receivers/transmitters.
The 74ABT2245 is the same as the 74ABT245-1. The part number
has been changed to reflect industry standards.
QUICK REFERENCE DATA
ORDERING INFORMATION
PIN CONFIGURATION
PIN DESCRIPTION
Philips Semiconductors Product specification
74ABT2245Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
LOGIC SYMBOL
LOGIC SYMBOL IEEE/IEC
FUNCTION TABLE =High voltage level =Low voltage level =Don’t care =High impedance ”off” state
SCHEMATIC OF EACH OUTPUT
Philips Semiconductors Product specification
74ABT2245Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
ABSOLUTE MAXIMUM RATINGS1, 2
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 performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
Philips Semiconductors Product specification
74ABT2245Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
DC ELECTRICAL CHARACTERISTICS
NOTES: Not more than one output should be tested at a time, and the duration of the test should not exceed one second. This is the increase in supply current for each input at 3.4V. This parameter is valid for any VCC between 0V and 2.1V with a transition time of up to 10msec. From VCC = 2.1V to VCC = 5V ± 10%, a
transition time of up to 100μsec is permitted.
Philips Semiconductors Product specification
74ABT2245Octal transceiver with direction pin
and 30Ω series termination resistors (3-State)
AC CHARACTERISTICSGND = 0V; tR = tF = 2.5ns; CL = 50pF, RL = 500Ω
AC WAVEFORMSVM = 1.5V, VIN = GND to 3.0V
Waveform 1. Waveforms Showing the Input to Output
Propagation Delays
Waveform 2. Waveforms Showing the 3-State Output Enable
and Disable Times
TEST CIRCUIT AND WAVEFORMS
