1
IDT74FCT163601A
3.3V CMOS 18-BIT UNIVERSAL BUS TRANSCEIVER INDUSTRIAL TEMPERATURE RANGE
JANUARY 2004INDUSTRIAL TEMPERATURE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
© 2004 Integrated Device Technology, Inc. DSC-3251/7
FEATURES:
• 0.5 MICRON CMOS Technology
• Typical tSK(o) (Output Skew) < 250ps
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
•VCC = 3.3V ± 0.3V, Normal Range, or VCC = 2.7V to 3.6V, Extended
Range
• CMOS power levels (0.4μ μ
μ μ
μ W typ. static)
• Rail-to-rail output swing for increased noise margin
• Low Ground Bounce (0.3V typ.)
• Inputs (except I/O) can be driven by 3.3V or 5V components
• Available in TSSOP package
FUNCTIONAL BLOCK DIAGRAM
IDT74FCT163601A
3.3V CMOS 18-BIT
UNIVERSAL BUS
TRANSCEIVER WITH
3-STATE OUTPUTS
DESCRIPTION:
The FCT163601/A 18-bit registered transceiver is built using advanced
dual metal CMOS technology. These 18-bit universal bus transceivers
combine D-type latches and D-type flip-flops to allow data flow in transpar-
ent, latched and clocked modes.
Data flow in each direction is controlled by output-enable (OEAB and
OEBA), latch-enable (LEAB and LEBA), and clock (CLKAB and CLKBA)
inputs. The clock can be controlled by the clock-enable (CLKENAB and
CLKENBA) inputs. For A-to-B data flow, the device operates in the
transparent mode when LEAB is high. When LEAB is low, the A data is
latched if CLKAB is held at a high or low logic level. If LEAB is low, the A-
bus data is stored in the latch/flip-flop on the low-to-high transition of CLKAB.
Output enable OEAB is active low. When OEAB is low, the outputs are active.
When OEAB is high, the outputs are in the high-impedance state.
Data flow for B to A is similar to that of A to B but uses OEBA, LEBA, CLKBA
and CLKENBA.
The FCT163601 has series current limiting resistors. These offer low
ground bounce, minimal undershoot, and controlled output fall times-
reducing the need for external series terminating resistors.
LEAB
CLKAB
LEBA
CLKBA
CLKENAB
OEAB
A1
TO 17 OTHER CHANNELS
OEBA
CE
1D
C1
CLK
CE
1D
C1
CLK
CLKENBA
1
56
55
2
28
30
29
27
354 B1