SC28C94A1A NXP Semiconductors, SC28C94A1A Datasheet - Page 30

• Manufacturer Part Number: SC28C94A1A
• Description: UART Interface IC UART QUAD W/FIFO
• Manufacturer: NXP Semiconductors
• Type: Quad UARTr

Specifications of SC28C94A1A

• Number Of Channels: 4
• Data Rate: 1 Mbps
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Supply Current: 35 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package / Case: PLCC-52
• Description/function: Quad UART
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 5 V
• Lead Free Status / Rohs Status: Details
• Other names: SC28C94A1A,512

Philips Semiconductors
2006 Aug 09
Quad universal asynchronous receiver/transmitter (QUART)
NOTE: I/O PIN DATA IS NOT LATCHED
I/O as Output
NOTES:
1. INCLUDES I/O WHEN USED AS TxRDY or RxDY/FFULL OUTPUTS AS WELL AS IRQN.
2. THE TEST FOR OPEN DRAIN OUTPUTS IS INTENDED TO GUARANTEE SWITCHING OF THE OUTPUT TRANSISTOR. MEASUREMENT OF THIS RESPONSE IS
REFERENCED FROM THE MIDPOINT OF THE SWITCHING SIGNAL, V
SURES TRUE SWITCHING HAS OCCURRED. BEYOND THIS LEVEL, THE EFFECTS OF EXTERNAL CIRCUITRY AND TEST ENVIRONMENT ARE PRONOUNCED
AND CAN GREATLY AFFECT THE RESULTANT MEASUREMENT.
I/O as Input
WRN
RDN
CEN
I/O PINS MUST BE STABLE FOR NON-CHANGING BUS DATA DURING THE READ.
INTERRUPT
INTERRUPT
OUTPUT
OUTPUT
WRN
RDN
RESET
1
1
t
PS
OLD DATA
V
M
Figure 12. Interrupt Timing
t
Figure 11. I/O Port Timing
PD
Figure 10. Reset Timing
M
, TO A POINT 0.5V ABOVE V
t
IR
t
IR
t
30
RES
OL
. THIS POINT REPRESENTS NOISE MARGIN THAT AS-
t
PD
V
t
PH
OL
V
OL
+0.5V
SD00169
+0.5V
V
OL
NEW DATA
V
OL
SC28C94
SD00170
Product data sheet
SD00171