IDT74LVCH16501A
3.3VCMOS18-BITREGISTEREDTRANSCEIVERWITH5VOLTI/O
INDUSTRIALTEMPERATURERANGE
3.3V CMOS 18-BIT
IDT74LVCH16501A
REGISTERED BUS TRANSCEIVER
WITH 5V TOLERANT I/O
AND BUS-HOLD
FEATURES:
DESCRIPTION:
• Typical tSK(o) (Output Skew) < 250ps
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
This 18-bit registered transceiver is built using advanced dual metal
CMOS technology. This high-speed, low power 18-bit registered bus
transceivercombinesD-typelatchesandD-typeflip-flopstoallowdataflow
in transparent 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. For A-to-B data flow, the
device operates in transparent mode when LEAB is high. When LEAB is
low,theAdataislatchedifCLKABisheldatahighorlowlogiclevel. IfLEAB
islow,theAbusdataisstoredinthelatch/flip-floponthelow-to-hightransition
of CLKAB. OEAB performs the output enable function on the B port. Data
flow from B port to A port is similar but requires using OEBA, LEBA and
CLKBA.Flow-throughorganizationofsignalpinssimplifieslayout.Allinputs
are designed with hysteresis for improved noise margin.
• VCC = 3.3V ± 0.3V, Normal Range
• VCC = 2.7V to 3.6V, Extended Range
• CMOS power levels (0.4µ W typ. static)
• All inputs, outputs, and I/O are 5V tolerant
• Supports hot insertion
• Available in SSOP, TSSOP, and TVSOP packages
DRIVE FEATURES:
• High Output Drivers: ±24mA
• Reduced system switching noise
TheLVCH16501Ahasbeendesignedwitha ±24mAoutputdriver. This
driver is capable of driving a moderate to heavy load while maintaining
speedperformance.
The LVCH16501A has “bus-hold” which retains the inputs’ last state
whenevertheinputgoestoahighimpedance. Thispreventsfloatinginputs
and eliminates the need for pull-up/down resistors.
APPLICATIONS:
• 5V and 3.3V mixed voltage systems
• Data communication and telecommunication systems
FUNCTIONALBLOCKDIAGRAM
1
OEAB
30
CLKBA
28
LEBA
27
OEBA
55
CLKAB
2
LEAB
C
C
D
54
3
B1
A1
D
C
D
C
D
TO 17 OTHER CHANNELS
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
OCTOBER 1999
1
© 1999 Integrated Device Technology, Inc.
DSC-3688/1