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87C751 Datasheet(PDF) 7 Page - NXP Semiconductors |
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87C751 Datasheet(HTML) 7 Page - NXP Semiconductors |
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7 / 24 page  Philips Semiconductors Product specification 83C751/87C751 80C51 8-bit microcontroller family 2K/64 OTP/ROM, I2C, low pin count 1998 May 01 7 NOTES TO DC ELECTRICAL CHARACTERISTICS: 1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise noted. 2. Under steady state (non-transient) conditions, IOL must be externally limited as follows: Maximum IOL per port pin: 10mA (NOTE: This is 85 °C spec.) Maximum IOL per 8-bit port: 26mA Maximum total IOL for all outputs: 67mA If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions. 3. Pins of ports 1 and 3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its maximum value when VIN is approximately 2V. 4. Power-down ICC is measured with all output pins disconnected; port 0 = VCC; X2, X1 n.c.; RST = VSS. 5. Active ICC is measured with all output pins disconnected; X1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC – 0.5V; X2 n.c.; RST = port 0 = VCC. ICC will be slightly higher if a crystal oscillator is used. 6. Idle ICC is measured with all output pins disconnected; X1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC – 0.5V; X2 n.c.; port 0 = VCC; RST = VSS. AC ELECTRICAL CHARACTERISTICS Tamb = 0°C to +70°C or –40°C to +85°C, VCC = 5V ±10% for 87C751, VCC = 5V ±10% for 83C751, VSS = 0V1, 2 12MHz CLOCK VARIABLE CLOCK SYMBOL PARAMETER MIN MAX MIN MAX UNIT 1/tCLCL Oscillator frequency: 3.5 12 MHz 3.5 16 MHz External Clock (Figure 1) tCHCX High time 20 20 ns tCLCX Low time 20 20 ns tCLCH Rise time 20 20 ns tCHCL Fall time 20 20 ns NOTES: 1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise noted. 2. Load capacitance for ports = 80pF. |
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