MC100E337FN 查看數據表（PDF） - Motorola => Freescale
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MC100E337FN Datasheet PDF : 5 Pages
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
3ĆBit Scannable Registered
Bus Transceiver
MC10E337
MC100E337
The MC10E/100E337 is a 3-bit registered bus transceiver with scan.
The bus outputs (BUS0–BUS2) are specified for driving a 25Ω bus; the
receive outputs (Q0 – Q2) are specified for 50Ω. The bus outputs feature
a normal HIGH level (VOH) and a cutoff LOW level — when LOW, the
outputs go to – 2.0V and the output emitter-follower is “off”, presenting a
high impedance to the bus. The bus outputs also feature edge slow-down
capacitors.
• Scannable Version of E336
• 25Ω Cutoff Bus Outputs
• 50Ω Receiver Outputs
• Scannable Registers
• Sync. and Async. Bus Enables
• Non-inverting Data Path
• 1500ps Max. Clock to Bus (Data Transmit)
• 1000ps Max. Clock to Q (Data Receive)
• Bus Outputs Feature Internal Edge Slow-Down Capacitors
• Additional Package Ground Pins
• Extended 100E VEE Range of – 4.2V to – 5.46V
• 75kΩ Input Pulldown Resistors
3-BIT SCANNABLE
REGISTERED
BUS TRANSCEIVER
FN SUFFIX
PLASTIC PACKAGE
CASE 776-02
Both drive and receive sides feature the same logic, including a loopback path to hold data. The HOLD/LOAD function is
controlled by Transmit Enable (TEN) and Receive Enable (REN) on the transmit and receive sides respectively, with a HIGH
selecting LOAD. Note that the implementation of the E337 Receive Enable differs from that of the E336.
A synchronous bus enable (SBUSEN) is provided for normal, non-scan operation. The asynchronous bus disable (ABUSDIS)
disables the bus immediately for scan mode.
The SYNCEN input is provided for flexibility when re-enabling the bus after disabling with ABUSDIS, allowing either
synchronous or asynchronous re-enabling. An alternative use is asynchronous-only operation with ABUSDIS, in which case
SYNCEN is tied LOW, or left open. SYNCEN is implemented as an overriding SET control (active-LOW) to the enable flip-flop.
Scan mode is selected by a HIGH at the SCAN input. Scan input data is shifted in through S_IN and output data appears at the
Q2 output.
All registers are clocked on the positive transition of CLK. Additional lead-frame grounding is provided through the Ground pins
(GND) which should be connected to 0V. The GND pins are not electrically connected to the chip.
PIN NAMES
Pin
A0 – A2
B0 – B2
S-IN
TEN, REN
SCAN
ABUSDIS
SBUSEN
SYNCEN
CLK
BUS0 – BUS2
Q0 – Q2
Function
Data Inputs A
Data Inputs B
Serial (Scan) Data Input
HOLD/LOAD Controls
Scan Control
Asynchronous Bus Disable
Synchronous Bus Enable
Synchronous Enable Control
Clock
25Ω Cutoff Bus Outputs
Receive Data Outputs (Q2 serves as SCAN_OUT in scan mode)
12/93
© Motorola, Inc. 1996
2–1
REV 2
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