SM8951B Datasheet, PDF (9/18 Pages) SyncMOS Technologies,Inc – 8-Bits Micro-controller

SyncMOS Technologies International, Inc.
SM8951B
8-Bits Micro-controller
With4KBFlashROM&128bytesRAM embedded
ITL
Transition current High to Low Port 1,2,3
See note 4
VCC = 3.6V, VIN = 2.0 V
-75
400
μA
ILI
Input leakage current P0, /EA
VCC = 3.0V ~3.6V,
0.45V<VIN<VCC
-10
10
μA
VOL1
Output LOW voltage, Port 0,ALE, /PSEN
OUTPUT
IOL = 6mA，VCC =3.3V
0.4
V
VOL2
Output Low voltage Port 1,2,3
IOL = 5mA，VCC =3.3V
0.4
V
VOH1 Output High voltage Port0, ALE, /PSEN
IOH =-300uA，VCC =3.3V 2.4
V
VOH2 Output High voltage Port 1,2,3
IOH =-20μA，VCC =3.3V
2.4
V
ISK1
Sink Current Port 1, 2, 3
VCC = 3.3V, VIN = 0.4 V
6
mA
ISK2
Sink Current Port 0,ALE, /PSEN
VCC = 3.3V, VIN = 0.4 V
8
mA
ISR1
Source Current Port 1, 2, 3
VCC = 3.3V, VIN = 2.4 V
-80
uA
ISR2
Source Current Port 0,ALE, /PSEN
VCC = 3.3V, VIN = 2.4 V
-8
mA
RRST
CIO
Internal RESET pull-down resistor
Pin capacitance
50
300
kΩ
Test freq=1MHz, TA=25℃
10
pF
NOTES FOR DC ELECTRICAL CHARACTERISTICS
1. The operating supply current is measured with all output disconnected;
XTAL1 driven with tr = tf = 5ns; VIL = VSS+0.5V; VIH=VCC-0.5V; XTAL2 not connect;
/EA=RST=Port0=VDD;
2. The IDLE MODE supply current is measured with all output pins disconnected;
XTAL1 driven with tr = tf = 5ns; VIL = VSS+0.5V; VIH=VCC-0.5V; XTAL2 not connect;
/EA=Port0=VDD;
3. The POWER-DOWN MODE supply current is measured with all output pins disconnected;
VIL = VSS+0.5V; VIH=VCC-0.5V; XTAL2 not connect; /EA= Port0=VDD;
4. Port 1, 2, 3, and 4 sources a transition current when they are being externally driven from HIGH to LOW. The transition current reaches its
maximum value when VIN is approximately 2V.
5. Capacities loading on port 0 and 2 may cause spurious noise to be superimposed on VOL of ALE and port 1, 3, and 4. The noise is due to external
bus capacitance discharging into port 0 and port 2 pins when these pins make 1-to-0 transitions during bus operations. In the worst cases
(capacitive loading > 100pF), the noise pulse on the ALE pin may exceed 0.8V. In such cases, it may be desirable to qualify ALE with a Schmitt
Trigger, or use an address latch with a Schmitt trigger STROBE input.
ICC Active mode test circuit
ICC ^Vcc
Vcc
VCC
RST
PO ⁸
SM8951B ^EA
(NC)
Clock Signal
XTAL2
XTAL1
VSS
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M022Ver:BSM8951B
9
06/2009