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CBT3251
CBT3251 1-of-8 FET multiplexer/demultiplexer
Preliminary data 2002 Sep 09
Philips Semiconductors Preliminary data
CBT32511-of-8 FET multiplexer/demultiplexer
FEATURES 5 Ω switch connection between two ports TTL-compatible input levels Minimal propagation delay through the switch ESD protection exceeds 2000 V HBM per JESD22-A114,
200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101 Latch-up testing is done to JESDEC Standard JESD78 which
exceeds 100 mA
DESCRIPTIONThe CBT3251 is a 1-of-8 high-speed TTL-compatible FET
multiplexer/demultiplexer. The low on resistance of the switch allows
inputs to be connected to outputs without adding propagation delay
or generating additional ground bounce noise.
When output enable (OE) is low, the CBT3251 is enabled. S0, S1,
and S2 select one of the B outputs for the A-input data.
The CBT3251 is characterized for operation from –40 to +85°C.
PIN CONFIGURATION
PIN DESCRIPTION
ORDERING INFORMATIONStandard packing quantities and other packaging data is available at www.philipslogic.com/packaging.
Philips Semiconductors Preliminary data
CBT32511-of-8 FET multiplexer/demultiplexer
LOGIC DIAGRAM (positive logic)
FUNCTION TABLE
Philips Semiconductors Preliminary data
CBT32511-of-8 FET multiplexer/demultiplexer
ABSOLUTE MAXIMUM RATINGS1
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 negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
NOTE: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation.
DC ELECTRICAL CHARACTERISTICS
NOTES: All typical values are at VCC = 5 V, Tamb = 25 °C. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND Measured by the voltage drop between the A and the B terminals at the indicated current through the switch.
On-state resistance is determined by the lowest voltage of the two (A or B) terminals.
Philips Semiconductors Preliminary data
CBT32511-of-8 FET multiplexer/demultiplexer
AC CHARACTERISTICSTamb = –40 to +85 °C; CL = 50 pF
NOTE: The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance,
when driven by an ideal voltage source (zero output impedance).
AC WAVEFORMSVM = 1.5V, VIN = GND to 3.0V
Waveform 1. Input to Output Propagation Delays
Waveform 2. 3-State Output Enable and Disable Times
NOTES:
TEST CIRCUIT AND WAVEFORMS
NOTES: All input pulses are supplied by generators having the following
characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. The outputs are measured one at a time with one transition per
measurement.
Philips Semiconductors Preliminary data
CBT32511-of-8 FET multiplexer/demultiplexer
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
