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PDF IDT74FCT833BP Data sheet ( Hoja de datos )

Número de pieza IDT74FCT833BP
Descripción FAST CMOS PARITY BUS TRANSCEIVER
Fabricantes Integrated Device 
Logotipo Integrated Device Logotipo



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®
Integrated Device Technology, Inc.
FAST CMOS
PARITY BUS
TRANSCEIVER
IDT54/74FCT833A
IDT54/74FCT833B
FEATURES:
• Equivalent to AMD’s Am29833 bipolar parity bus
transceiver in pinout/function, speed and output drive
over full temperature and voltage supply extremes
• High-speed bidirectional bus transceiver for processor-
organized devices
• IDT54/74FCT833A equivalent to Am29833A speed and
output drive
• IDT54/74FCT833B 30% faster than Am29833A
• Buffered direction and three-state controls
• Error flag with open-drain output
• IOL = 48mA (commercial) and 32mA (military)
• TTL input and output level compatible
• CMOS output level compatible
• Substantially lower input current levels than AMD’s
bipolar Am29800 series (5µA max.)
• Available in plastic DIP, CERDIP, LCC and SOIC
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
DESCRIPTION:
The IDT54/74FCT833s are high-performance bus
transceivers designed for two-way communications. They
each contain an 8-bit data path from the R (port) to the T (port),
an 8-bit data path from the T (port) to the R (port), and a 9-bit
parity checker/generator. The error flag can be clocked and
stored in a register and read at the ERR output. The clear
(CLR) input is used to clear the error flag register.
The output enables OET and OER are used to force the
port outputs to the high-impedance state so that the device
can drive bus lines directly. In addition, OER and OET can be
used to force a parity error by enabling both lines
simultaneously. This transmission of inverted parity gives the
designer more system diagnostic capability. The devices are
specified at 48mA and 32mA output sink current over the
commercial and military temperature ranges, respectively.
FUNCTIONAL BLOCK DIAGRAM
RI
8
8 TI
OET
OER
CLK
CLR
8
S MUX
8
9
9-BIT
PARITY TREE
P
PARITY
DQ
Q
CP
CLR
ERR
2557 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1992 Integrated Device Technology, Inc.
7.21
MAY 1992
DSC-4621/2
1

1 page




IDT74FCT833BP pdf
IDT54/74FCT833A/B
FAST CMOS PARITY BUS TRANSCEIVER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS VLC = 0.2V; VHC = VCC – 0.2V
Symbol
Parameter
Test Conditions(1)
ICC Quiescent Power Supply Current Vcc = Max.; VIN VHC, VIN VLC
ICC
ICCD
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current(4)
Outputs Open
Vcc = Max.
VIN = 3.4V(3)
Vcc = Max.
VIN VLC
OET = OER = GND
VIN VHC
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
Vcc = Max.
Outputs Open
fCP = 10MHz
VIN VHC
VIN VLC
(FCT)
50% Duty Cycle
OET = GND
OER = VCC
VIN = 3.4V
VIN = GND
fi = 2.5MHz
One Bit Toggling
Vcc = Max.
Outputs Open
VIN VHC
VIN VLC
fCP = 10MHz
(FCT)
50% Duty Cycle
OET = GND
VIN = 3.4V
fi = 2.5MHz
OER = VCC
Eight Bits Toggling
VIN = GND
Min.
Typ.(2)
0.2
0.5
Max.
1.5
2.0
— 0.15 0.25
— 1.4 3.4
— 1.9 5.4
— 4.0 7.8(5)
— 6.2 16.8(5)
Unit
mA
mA
mA/
MHz
mA
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ICC DHNT + ICCD (fCP/2 + fiNi)
ICC = Quiescent Current
ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Output Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
2557 tbl 07
7.21 5

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